./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/sll-simple-white-blue-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 b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:46:49,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:46:49,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:46:49,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:46:49,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:46:49,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:46:49,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:46:49,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:46:49,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:46:49,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:46:49,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:46:49,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:46:49,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:46:49,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:46:49,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:46:49,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:46:49,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:46:49,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:46:49,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:46:49,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:46:49,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:46:49,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:46:49,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:46:49,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:46:49,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:46:49,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:46:49,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:46:49,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:46:49,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:46:49,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:46:49,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:46:49,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:46:49,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:46:49,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:46:49,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:46:49,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:46:49,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:46:49,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:46:49,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:46:49,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:46:49,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:46:49,136 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:46:49,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:46:49,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:46:49,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:46:49,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:46:49,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:46:49,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:46:49,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:46:49,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:46:49,167 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:46:49,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:46:49,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:46:49,169 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:46:49,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:46:49,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:46:49,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:46:49,169 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:46:49,169 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:46:49,170 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:46:49,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:46:49,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:46:49,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:46:49,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:46:49,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:46:49,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:46:49,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:46:49,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:46:49,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:46:49,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:46:49,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:46:49,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:46:49,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:46:49,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2021-12-14 19:46:49,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:46:49,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:46:49,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:46:49,425 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:46:49,426 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:46:49,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-12-14 19:46:49,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbdbdd5e6/45fbf6fd6c084d2aadebc7b369bd7bd7/FLAG9a74bbdea [2021-12-14 19:46:50,016 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:46:50,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-12-14 19:46:50,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbdbdd5e6/45fbf6fd6c084d2aadebc7b369bd7bd7/FLAG9a74bbdea [2021-12-14 19:46:50,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbdbdd5e6/45fbf6fd6c084d2aadebc7b369bd7bd7 [2021-12-14 19:46:50,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:46:50,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:46:50,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:46:50,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:46:50,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:46:50,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20cf8cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50, skipping insertion in model container [2021-12-14 19:46:50,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:46:50,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:46:50,831 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-12-14 19:46:50,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:46:50,848 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:46:50,898 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-12-14 19:46:50,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:46:50,925 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:46:50,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50 WrapperNode [2021-12-14 19:46:50,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:46:50,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:46:50,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:46:50,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:46:50,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,973 INFO L137 Inliner]: procedures = 119, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 111 [2021-12-14 19:46:50,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:46:50,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:46:50,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:46:50,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:46:50,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:50,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:51,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:51,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:46:51,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:46:51,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:46:51,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:46:51,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (1/1) ... [2021-12-14 19:46:51,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:46:51,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:46:51,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 19:46:51,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 19:46:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:46:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:46:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:46:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:46:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 19:46:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 19:46:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:46:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 19:46:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:46:51,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:46:51,213 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:46:51,218 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:46:51,533 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:46:51,539 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:46:51,539 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-14 19:46:51,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:46:51 BoogieIcfgContainer [2021-12-14 19:46:51,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:46:51,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:46:51,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:46:51,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:46:51,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:46:50" (1/3) ... [2021-12-14 19:46:51,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb944f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:46:51, skipping insertion in model container [2021-12-14 19:46:51,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:50" (2/3) ... [2021-12-14 19:46:51,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb944f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:46:51, skipping insertion in model container [2021-12-14 19:46:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:46:51" (3/3) ... [2021-12-14 19:46:51,548 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2021-12-14 19:46:51,552 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:46:51,557 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-12-14 19:46:51,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:46:51,596 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 [2021-12-14 19:46:51,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-12-14 19:46:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 53 states have (on average 2.150943396226415) internal successors, (114), 98 states have internal predecessors, (114), 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) [2021-12-14 19:46:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:46:51,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:51,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:46:51,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-14 19:46:51,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787871526] [2021-12-14 19:46:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:51,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:51,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:51,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:51,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787871526] [2021-12-14 19:46:51,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787871526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:51,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:51,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:46:51,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947896409] [2021-12-14 19:46:51,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:51,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:46:51,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:46:51,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:46:51,791 INFO L87 Difference]: Start difference. First operand has 99 states, 53 states have (on average 2.150943396226415) internal successors, (114), 98 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:46:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:51,900 INFO L93 Difference]: Finished difference Result 127 states and 135 transitions. [2021-12-14 19:46:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:46:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-14 19:46:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:51,911 INFO L225 Difference]: With dead ends: 127 [2021-12-14 19:46:51,911 INFO L226 Difference]: Without dead ends: 123 [2021-12-14 19:46:51,912 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 [2021-12-14 19:46:51,915 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 85 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:51,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 110 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:46:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-14 19:46:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-12-14 19:46:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 93 states have internal predecessors, (100), 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) [2021-12-14 19:46:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-12-14 19:46:51,947 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 3 [2021-12-14 19:46:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:51,947 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-12-14 19:46:51,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:46:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-12-14 19:46:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:46:51,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:51,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:46:51,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:46:51,949 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-14 19:46:51,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:51,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033625158] [2021-12-14 19:46:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:51,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:51,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:51,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033625158] [2021-12-14 19:46:51,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033625158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:51,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:51,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:46:51,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459508834] [2021-12-14 19:46:51,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:51,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:46:51,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:51,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:46:51,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:46:51,994 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:46:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:52,114 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2021-12-14 19:46:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:46:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-14 19:46:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:52,119 INFO L225 Difference]: With dead ends: 121 [2021-12-14 19:46:52,120 INFO L226 Difference]: Without dead ends: 121 [2021-12-14 19:46:52,120 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 [2021-12-14 19:46:52,121 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 81 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:52,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 106 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:46:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-14 19:46:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-12-14 19:46:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 91 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-12-14 19:46:52,129 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 3 [2021-12-14 19:46:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:52,129 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-12-14 19:46:52,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:46:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-12-14 19:46:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:46:52,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:52,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:52,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:46:52,131 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash 59263661, now seen corresponding path program 1 times [2021-12-14 19:46:52,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:52,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742993021] [2021-12-14 19:46:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:52,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:52,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:52,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742993021] [2021-12-14 19:46:52,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742993021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:52,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:52,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:46:52,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733204614] [2021-12-14 19:46:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:52,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:46:52,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:46:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:46:52,207 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-12-14 19:46:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:52,336 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2021-12-14 19:46:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:46:52,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2021-12-14 19:46:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:52,338 INFO L225 Difference]: With dead ends: 95 [2021-12-14 19:46:52,338 INFO L226 Difference]: Without dead ends: 95 [2021-12-14 19:46:52,338 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 [2021-12-14 19:46:52,339 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 123 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:52,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 40 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:46:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-14 19:46:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2021-12-14 19:46:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 86 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2021-12-14 19:46:52,346 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 8 [2021-12-14 19:46:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:52,346 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2021-12-14 19:46:52,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-12-14 19:46:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2021-12-14 19:46:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:46:52,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:52,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:52,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:46:52,347 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:52,348 INFO L85 PathProgramCache]: Analyzing trace with hash 59263662, now seen corresponding path program 1 times [2021-12-14 19:46:52,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:52,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560906480] [2021-12-14 19:46:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:52,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:52,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:52,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560906480] [2021-12-14 19:46:52,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560906480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:52,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:52,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:46:52,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481307998] [2021-12-14 19:46:52,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:52,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:46:52,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:46:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:46:52,426 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-12-14 19:46:52,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:52,575 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2021-12-14 19:46:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:46:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 [2021-12-14 19:46:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:52,577 INFO L225 Difference]: With dead ends: 117 [2021-12-14 19:46:52,577 INFO L226 Difference]: Without dead ends: 117 [2021-12-14 19:46:52,577 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 [2021-12-14 19:46:52,578 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 126 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:52,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 57 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:46:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-14 19:46:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2021-12-14 19:46:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.5) internal successors, (114), 101 states have internal predecessors, (114), 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) [2021-12-14 19:46:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2021-12-14 19:46:52,584 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 8 [2021-12-14 19:46:52,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:52,584 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2021-12-14 19:46:52,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-12-14 19:46:52,585 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2021-12-14 19:46:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:46:52,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:52,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:52,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:46:52,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:52,586 INFO L85 PathProgramCache]: Analyzing trace with hash 467003055, now seen corresponding path program 1 times [2021-12-14 19:46:52,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:52,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221374398] [2021-12-14 19:46:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:52,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:52,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:52,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221374398] [2021-12-14 19:46:52,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221374398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:52,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:52,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:46:52,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089929995] [2021-12-14 19:46:52,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:52,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:46:52,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:46:52,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:46:52,693 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2021-12-14 19:46:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:52,874 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-12-14 19:46:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:46:52,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2021-12-14 19:46:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:52,876 INFO L225 Difference]: With dead ends: 103 [2021-12-14 19:46:52,876 INFO L226 Difference]: Without dead ends: 103 [2021-12-14 19:46:52,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:46:52,877 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 44 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:52,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 165 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:46:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-14 19:46:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-12-14 19:46:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 76 states have (on average 1.486842105263158) internal successors, (113), 100 states have internal predecessors, (113), 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) [2021-12-14 19:46:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-12-14 19:46:52,882 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 12 [2021-12-14 19:46:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-12-14 19:46:52,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2021-12-14 19:46:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-12-14 19:46:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:46:52,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:52,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:52,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:46:52,884 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 467003056, now seen corresponding path program 1 times [2021-12-14 19:46:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:52,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420108473] [2021-12-14 19:46:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:52,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:52,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:52,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420108473] [2021-12-14 19:46:52,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420108473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:52,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:52,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:46:52,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935832384] [2021-12-14 19:46:52,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:52,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:46:52,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:46:52,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:46:52,996 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2021-12-14 19:46:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:53,214 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2021-12-14 19:46:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:46:53,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2021-12-14 19:46:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:53,215 INFO L225 Difference]: With dead ends: 101 [2021-12-14 19:46:53,215 INFO L226 Difference]: Without dead ends: 101 [2021-12-14 19:46:53,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:46:53,216 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 13 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:53,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 207 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:46:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-14 19:46:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2021-12-14 19:46:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-12-14 19:46:53,233 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 12 [2021-12-14 19:46:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:53,234 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-12-14 19:46:53,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2021-12-14 19:46:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-12-14 19:46:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 19:46:53,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:53,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:53,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 19:46:53,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1831378933, now seen corresponding path program 1 times [2021-12-14 19:46:53,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818618697] [2021-12-14 19:46:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:53,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:53,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:53,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818618697] [2021-12-14 19:46:53,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818618697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:53,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:53,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:46:53,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189232841] [2021-12-14 19:46:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:53,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:46:53,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:46:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:46:53,314 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-12-14 19:46:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:53,424 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-12-14 19:46:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:46:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2021-12-14 19:46:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:53,425 INFO L225 Difference]: With dead ends: 103 [2021-12-14 19:46:53,425 INFO L226 Difference]: Without dead ends: 103 [2021-12-14 19:46:53,426 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 [2021-12-14 19:46:53,426 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 16 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:53,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 204 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:46:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-14 19:46:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2021-12-14 19:46:53,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 97 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2021-12-14 19:46:53,431 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 15 [2021-12-14 19:46:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:53,431 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2021-12-14 19:46:53,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-12-14 19:46:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2021-12-14 19:46:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:46:53,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:53,432 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:53,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 19:46:53,432 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:53,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1263266080, now seen corresponding path program 1 times [2021-12-14 19:46:53,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:53,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161727343] [2021-12-14 19:46:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:53,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:53,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161727343] [2021-12-14 19:46:53,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161727343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:46:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465690663] [2021-12-14 19:46:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:53,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:53,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:46:53,623 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) [2021-12-14 19:46:53,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:46:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-14 19:46:53,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:46:53,804 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 [2021-12-14 19:46:53,920 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:46:53,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-14 19:46:53,960 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:46:53,960 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 [2021-12-14 19:46:54,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:46:54,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:46:54,155 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 31 treesize of output 19 [2021-12-14 19:46:54,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-14 19:46:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:54,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:46:54,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-14 19:46:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:54,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465690663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:46:54,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:46:54,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2021-12-14 19:46:54,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600971029] [2021-12-14 19:46:54,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:46:54,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 19:46:54,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:54,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 19:46:54,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-12-14 19:46:54,621 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:55,388 INFO L93 Difference]: Finished difference Result 163 states and 178 transitions. [2021-12-14 19:46:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:46:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-14 19:46:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:55,390 INFO L225 Difference]: With dead ends: 163 [2021-12-14 19:46:55,391 INFO L226 Difference]: Without dead ends: 163 [2021-12-14 19:46:55,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 19:46:55,392 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 539 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:55,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 290 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 601 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2021-12-14 19:46:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-14 19:46:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 104. [2021-12-14 19:46:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 83 states have (on average 1.4337349397590362) internal successors, (119), 103 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-12-14 19:46:55,397 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 18 [2021-12-14 19:46:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:55,397 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-12-14 19:46:55,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-12-14 19:46:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 19:46:55,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:55,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:55,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 19:46:55,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:55,616 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1263266079, now seen corresponding path program 1 times [2021-12-14 19:46:55,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:55,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836976095] [2021-12-14 19:46:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:55,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:55,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836976095] [2021-12-14 19:46:55,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836976095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:46:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29048561] [2021-12-14 19:46:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:55,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:46:55,699 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) [2021-12-14 19:46:55,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:46:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:55,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 19:46:55,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:46:55,793 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 [2021-12-14 19:46:55,826 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:46:55,826 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 [2021-12-14 19:46:55,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:46:55,922 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 [2021-12-14 19:46:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:55,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:46:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:56,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29048561] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:46:56,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:46:56,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-14 19:46:56,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923163186] [2021-12-14 19:46:56,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:46:56,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 19:46:56,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 19:46:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:46:56,033 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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) [2021-12-14 19:46:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:56,322 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2021-12-14 19:46:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:46:56,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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 18 [2021-12-14 19:46:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:56,324 INFO L225 Difference]: With dead ends: 146 [2021-12-14 19:46:56,324 INFO L226 Difference]: Without dead ends: 146 [2021-12-14 19:46:56,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:46:56,325 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 260 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:56,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 137 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 366 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2021-12-14 19:46:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-14 19:46:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-12-14 19:46:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.4125) internal successors, (113), 99 states have internal predecessors, (113), 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) [2021-12-14 19:46:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2021-12-14 19:46:56,329 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 18 [2021-12-14 19:46:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:56,329 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2021-12-14 19:46:56,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 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) [2021-12-14 19:46:56,329 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2021-12-14 19:46:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:46:56,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:56,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:56,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:46:56,530 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,SelfDestructingSolverStorable8 [2021-12-14 19:46:56,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash 504911936, now seen corresponding path program 1 times [2021-12-14 19:46:56,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:56,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669655994] [2021-12-14 19:46:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:56,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:56,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669655994] [2021-12-14 19:46:56,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669655994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:56,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:56,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:46:56,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618922460] [2021-12-14 19:46:56,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:56,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:46:56,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:46:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:46:56,617 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-12-14 19:46:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:56,843 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2021-12-14 19:46:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:46:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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 19 [2021-12-14 19:46:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:56,847 INFO L225 Difference]: With dead ends: 144 [2021-12-14 19:46:56,847 INFO L226 Difference]: Without dead ends: 144 [2021-12-14 19:46:56,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:46:56,848 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 313 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:56,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 93 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:46:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-14 19:46:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2021-12-14 19:46:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 84 states have (on average 1.4166666666666667) internal successors, (119), 103 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-12-14 19:46:56,852 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 19 [2021-12-14 19:46:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:56,852 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-12-14 19:46:56,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-12-14 19:46:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-12-14 19:46:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:46:56,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:56,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:56,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:46:56,854 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:56,854 INFO L85 PathProgramCache]: Analyzing trace with hash 504911937, now seen corresponding path program 1 times [2021-12-14 19:46:56,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:56,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956756869] [2021-12-14 19:46:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:56,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:56,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:56,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956756869] [2021-12-14 19:46:56,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956756869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:56,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:56,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:46:56,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661801256] [2021-12-14 19:46:56,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:56,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:46:56,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:46:56,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:46:56,955 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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) [2021-12-14 19:46:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:57,335 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2021-12-14 19:46:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:46:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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 19 [2021-12-14 19:46:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:57,336 INFO L225 Difference]: With dead ends: 167 [2021-12-14 19:46:57,336 INFO L226 Difference]: Without dead ends: 167 [2021-12-14 19:46:57,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:46:57,337 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 245 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:57,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 179 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:46:57,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-12-14 19:46:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-12-14 19:46:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.4069767441860466) internal successors, (121), 105 states have internal predecessors, (121), 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) [2021-12-14 19:46:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2021-12-14 19:46:57,340 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 19 [2021-12-14 19:46:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:57,341 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2021-12-14 19:46:57,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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) [2021-12-14 19:46:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2021-12-14 19:46:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:46:57,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:57,342 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] [2021-12-14 19:46:57,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 19:46:57,342 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash -110930843, now seen corresponding path program 1 times [2021-12-14 19:46:57,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:57,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266001135] [2021-12-14 19:46:57,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:57,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:57,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:57,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266001135] [2021-12-14 19:46:57,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266001135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:57,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:57,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:46:57,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180235117] [2021-12-14 19:46:57,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:57,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:46:57,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:57,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:46:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:46:57,507 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:57,976 INFO L93 Difference]: Finished difference Result 204 states and 226 transitions. [2021-12-14 19:46:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:46:57,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 19:46:57,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:57,978 INFO L225 Difference]: With dead ends: 204 [2021-12-14 19:46:57,978 INFO L226 Difference]: Without dead ends: 204 [2021-12-14 19:46:57,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-12-14 19:46:57,980 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 218 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:57,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 331 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:46:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-14 19:46:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 117. [2021-12-14 19:46:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.3814432989690721) internal successors, (134), 116 states have internal predecessors, (134), 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) [2021-12-14 19:46:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-12-14 19:46:57,986 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 21 [2021-12-14 19:46:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:57,986 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-12-14 19:46:57,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-12-14 19:46:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:46:57,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:57,991 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] [2021-12-14 19:46:57,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 19:46:57,991 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash 855282434, now seen corresponding path program 1 times [2021-12-14 19:46:57,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:57,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952462914] [2021-12-14 19:46:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:57,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:58,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952462914] [2021-12-14 19:46:58,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952462914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:58,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:58,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:46:58,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337121336] [2021-12-14 19:46:58,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:58,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:46:58,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:58,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:46:58,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:46:58,031 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-14 19:46:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:58,124 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2021-12-14 19:46:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:46:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 22 [2021-12-14 19:46:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:58,125 INFO L225 Difference]: With dead ends: 136 [2021-12-14 19:46:58,125 INFO L226 Difference]: Without dead ends: 136 [2021-12-14 19:46:58,126 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 [2021-12-14 19:46:58,128 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 114 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:58,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 83 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:46:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-14 19:46:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2021-12-14 19:46:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 116 states have internal predecessors, (133), 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) [2021-12-14 19:46:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2021-12-14 19:46:58,137 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 22 [2021-12-14 19:46:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:58,137 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2021-12-14 19:46:58,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-14 19:46:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2021-12-14 19:46:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:46:58,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:58,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:58,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 19:46:58,140 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:58,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2096783466, now seen corresponding path program 2 times [2021-12-14 19:46:58,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:58,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587797422] [2021-12-14 19:46:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:58,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 19:46:58,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:58,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587797422] [2021-12-14 19:46:58,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587797422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:58,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:58,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:46:58,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367881393] [2021-12-14 19:46:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:58,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:46:58,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:46:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:46:58,280 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:58,469 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2021-12-14 19:46:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:46:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 19:46:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:58,470 INFO L225 Difference]: With dead ends: 145 [2021-12-14 19:46:58,470 INFO L226 Difference]: Without dead ends: 145 [2021-12-14 19:46:58,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:46:58,471 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 123 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:58,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 198 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:46:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-14 19:46:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-12-14 19:46:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 114 states have internal predecessors, (129), 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) [2021-12-14 19:46:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2021-12-14 19:46:58,475 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 22 [2021-12-14 19:46:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:58,475 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2021-12-14 19:46:58,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:46:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2021-12-14 19:46:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:46:58,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:58,476 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] [2021-12-14 19:46:58,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 19:46:58,476 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:58,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:58,476 INFO L85 PathProgramCache]: Analyzing trace with hash 720011197, now seen corresponding path program 1 times [2021-12-14 19:46:58,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:58,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017156702] [2021-12-14 19:46:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:58,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:58,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:58,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017156702] [2021-12-14 19:46:58,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017156702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:46:58,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:46:58,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:46:58,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167749462] [2021-12-14 19:46:58,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:46:58,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:46:58,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:46:58,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:46:58,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:46:58,594 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-12-14 19:46:58,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:46:58,791 INFO L93 Difference]: Finished difference Result 164 states and 180 transitions. [2021-12-14 19:46:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:46:58,792 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), 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 23 [2021-12-14 19:46:58,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:46:58,793 INFO L225 Difference]: With dead ends: 164 [2021-12-14 19:46:58,793 INFO L226 Difference]: Without dead ends: 164 [2021-12-14 19:46:58,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:46:58,794 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 135 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:46:58,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 229 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:46:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-14 19:46:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 118. [2021-12-14 19:46:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.346938775510204) internal successors, (132), 117 states have internal predecessors, (132), 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) [2021-12-14 19:46:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2021-12-14 19:46:58,797 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 23 [2021-12-14 19:46:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:46:58,797 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2021-12-14 19:46:58,797 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), 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) [2021-12-14 19:46:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2021-12-14 19:46:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:46:58,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:46:58,798 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:46:58,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 19:46:58,798 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:46:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:46:58,798 INFO L85 PathProgramCache]: Analyzing trace with hash 836442201, now seen corresponding path program 1 times [2021-12-14 19:46:58,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:46:58,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530108193] [2021-12-14 19:46:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:58,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:46:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:58,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:46:58,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530108193] [2021-12-14 19:46:58,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530108193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:46:58,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703956264] [2021-12-14 19:46:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:46:58,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:46:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:46:58,934 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) [2021-12-14 19:46:58,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:46:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:46:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-14 19:46:59,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:46:59,042 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 [2021-12-14 19:46:59,118 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 19:46:59,118 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 [2021-12-14 19:46:59,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:46:59,299 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:59,299 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 31 treesize of output 29 [2021-12-14 19:46:59,336 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:46:59,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-14 19:46:59,445 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 [2021-12-14 19:46:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:46:59,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:46:59,573 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_464 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_464) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2021-12-14 19:46:59,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:59,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2021-12-14 19:46:59,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:46:59,595 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 34 treesize of output 37 [2021-12-14 19:46:59,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-14 19:47:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:01,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703956264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:47:01,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:47:01,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2021-12-14 19:47:01,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891326865] [2021-12-14 19:47:01,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:47:01,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 19:47:01,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:01,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 19:47:01,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=577, Unknown=7, NotChecked=50, Total=756 [2021-12-14 19:47:01,986 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 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) [2021-12-14 19:47:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:02,663 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2021-12-14 19:47:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:47:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 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 23 [2021-12-14 19:47:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:02,665 INFO L225 Difference]: With dead ends: 181 [2021-12-14 19:47:02,665 INFO L226 Difference]: Without dead ends: 181 [2021-12-14 19:47:02,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=248, Invalid=1009, Unknown=7, NotChecked=68, Total=1332 [2021-12-14 19:47:02,667 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 318 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 756 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:02,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 453 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 751 Invalid, 0 Unknown, 756 Unchecked, 0.5s Time] [2021-12-14 19:47:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-14 19:47:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 134. [2021-12-14 19:47:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 114 states have (on average 1.3421052631578947) internal successors, (153), 133 states have internal predecessors, (153), 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) [2021-12-14 19:47:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2021-12-14 19:47:02,672 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 23 [2021-12-14 19:47:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:02,672 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2021-12-14 19:47:02,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 28 states have internal predecessors, (57), 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) [2021-12-14 19:47:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2021-12-14 19:47:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-14 19:47:02,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:02,675 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:02,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:02,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:02,892 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 836442202, now seen corresponding path program 1 times [2021-12-14 19:47:02,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:47:02,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616715754] [2021-12-14 19:47:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:02,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:47:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:03,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:47:03,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616715754] [2021-12-14 19:47:03,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616715754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:47:03,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394997263] [2021-12-14 19:47:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:03,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:47:03,060 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) [2021-12-14 19:47:03,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:47:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:03,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 19:47:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:03,159 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 [2021-12-14 19:47:03,226 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 [2021-12-14 19:47:03,239 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:47:03,242 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 [2021-12-14 19:47:03,274 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 11 treesize of output 7 [2021-12-14 19:47:03,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:03,392 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:03,393 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 31 treesize of output 29 [2021-12-14 19:47:03,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:47:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 19:47:03,433 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:03,433 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-14 19:47:03,437 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 18 treesize of output 20 [2021-12-14 19:47:03,574 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 [2021-12-14 19:47:03,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:47:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:03,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:47:03,770 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_542 (Array Int Int)) (v_ArrVal_541 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_541) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2021-12-14 19:47:03,789 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_542 (Array Int Int)) (v_ArrVal_541 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_541) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2021-12-14 19:47:03,801 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array Int Int)) (v_ArrVal_541 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_541) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) (forall ((v_ArrVal_542 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_542) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2021-12-14 19:47:03,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:03,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2021-12-14 19:47:03,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:03,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2021-12-14 19:47:03,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:03,836 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 52 treesize of output 55 [2021-12-14 19:47:03,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:03,849 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 82 treesize of output 81 [2021-12-14 19:47:03,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-14 19:47:03,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-12-14 19:47:03,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:03,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-14 19:47:03,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:47:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-14 19:47:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:04,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394997263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:47:04,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:47:04,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-14 19:47:04,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783995983] [2021-12-14 19:47:04,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:47:04,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-14 19:47:04,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-14 19:47:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=720, Unknown=3, NotChecked=168, Total=992 [2021-12-14 19:47:04,087 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:05,296 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2021-12-14 19:47:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 19:47:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-14 19:47:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:05,297 INFO L225 Difference]: With dead ends: 185 [2021-12-14 19:47:05,297 INFO L226 Difference]: Without dead ends: 185 [2021-12-14 19:47:05,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=356, Invalid=1723, Unknown=3, NotChecked=270, Total=2352 [2021-12-14 19:47:05,298 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 271 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 560 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:05,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 580 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1174 Invalid, 0 Unknown, 560 Unchecked, 0.6s Time] [2021-12-14 19:47:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-14 19:47:05,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 137. [2021-12-14 19:47:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 120 states have (on average 1.3083333333333333) internal successors, (157), 136 states have internal predecessors, (157), 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) [2021-12-14 19:47:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-12-14 19:47:05,301 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 23 [2021-12-14 19:47:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:05,302 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-12-14 19:47:05,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:05,302 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-12-14 19:47:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:47:05,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:05,302 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] [2021-12-14 19:47:05,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:05,503 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,SelfDestructingSolverStorable16 [2021-12-14 19:47:05,503 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 843879747, now seen corresponding path program 1 times [2021-12-14 19:47:05,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:47:05,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408821193] [2021-12-14 19:47:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:05,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:47:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:05,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:47:05,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408821193] [2021-12-14 19:47:05,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408821193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:05,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:05,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:47:05,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897991834] [2021-12-14 19:47:05,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:05,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:47:05,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:05,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:47:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:47:05,746 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:06,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:06,112 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2021-12-14 19:47:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:47:06,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-14 19:47:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:06,113 INFO L225 Difference]: With dead ends: 165 [2021-12-14 19:47:06,113 INFO L226 Difference]: Without dead ends: 165 [2021-12-14 19:47:06,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:47:06,114 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 70 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:06,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 253 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:47:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-14 19:47:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-12-14 19:47:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 132 states have (on average 1.2803030303030303) internal successors, (169), 148 states have internal predecessors, (169), 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) [2021-12-14 19:47:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-12-14 19:47:06,118 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 24 [2021-12-14 19:47:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:06,118 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-12-14 19:47:06,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:06,118 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-12-14 19:47:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:47:06,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:06,119 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] [2021-12-14 19:47:06,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 19:47:06,126 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1589119206, now seen corresponding path program 1 times [2021-12-14 19:47:06,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:47:06,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493341226] [2021-12-14 19:47:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:06,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:47:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:06,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:47:06,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493341226] [2021-12-14 19:47:06,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493341226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:06,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:06,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:47:06,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773118517] [2021-12-14 19:47:06,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:06,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:47:06,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:47:06,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:47:06,244 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:06,443 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2021-12-14 19:47:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:47:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-14 19:47:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:06,444 INFO L225 Difference]: With dead ends: 185 [2021-12-14 19:47:06,444 INFO L226 Difference]: Without dead ends: 185 [2021-12-14 19:47:06,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:47:06,445 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 169 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:06,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 204 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:47:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-14 19:47:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 149. [2021-12-14 19:47:06,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 132 states have (on average 1.2651515151515151) internal successors, (167), 148 states have internal predecessors, (167), 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) [2021-12-14 19:47:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2021-12-14 19:47:06,448 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 24 [2021-12-14 19:47:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:06,448 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2021-12-14 19:47:06,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2021-12-14 19:47:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:47:06,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:06,449 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:06,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 19:47:06,449 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1892750440, now seen corresponding path program 1 times [2021-12-14 19:47:06,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:47:06,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650762642] [2021-12-14 19:47:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:06,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:47:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:06,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:47:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650762642] [2021-12-14 19:47:06,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650762642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:47:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507096305] [2021-12-14 19:47:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:06,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:47:06,582 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) [2021-12-14 19:47:06,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:47:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:06,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-14 19:47:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:06,664 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 [2021-12-14 19:47:06,684 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 11 treesize of output 7 [2021-12-14 19:47:06,689 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 11 treesize of output 7 [2021-12-14 19:47:06,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:47:06,722 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 21 treesize of output 20 [2021-12-14 19:47:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:47:06,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 19:47:06,780 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:47:06,780 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 [2021-12-14 19:47:06,816 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 [2021-12-14 19:47:06,826 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 [2021-12-14 19:47:06,849 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 19 treesize of output 18 [2021-12-14 19:47:06,852 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 [2021-12-14 19:47:07,196 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-14 19:47:07,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2021-12-14 19:47:07,205 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:47:07,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-14 19:47:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:07,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:47:07,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:07,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-14 19:47:07,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:07,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-14 19:47:07,539 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_97| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_97|) 0)) (and (forall ((v_arrayElimArr_6 (Array Int Int))) (or (not (= (select v_arrayElimArr_6 0) |c_ULTIMATE.start_main_~head~0#1.base|)) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_97| v_arrayElimArr_6) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) (forall ((v_arrayElimArr_5 (Array Int Int))) (or (not (= (select v_arrayElimArr_5 0) |c_ULTIMATE.start_main_~head~0#1.offset|)) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~x~0#1.base_97| v_arrayElimArr_5) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)))))) is different from false [2021-12-14 19:47:07,832 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-14 19:47:07,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 67 [2021-12-14 19:47:07,878 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-14 19:47:07,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 72 [2021-12-14 19:47:07,884 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 19:47:07,885 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 83 treesize of output 69 [2021-12-14 19:47:07,889 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-14 19:47:07,889 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 80 treesize of output 66 [2021-12-14 19:47:07,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:07,897 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 33 treesize of output 38 [2021-12-14 19:47:07,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:07,907 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 34 [2021-12-14 19:47:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:07,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507096305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:47:07,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:47:07,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 13] total 22 [2021-12-14 19:47:07,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126363060] [2021-12-14 19:47:07,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:47:07,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 19:47:07,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 19:47:07,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=349, Unknown=16, NotChecked=38, Total=462 [2021-12-14 19:47:07,980 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:08,585 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2021-12-14 19:47:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:47:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-14 19:47:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:08,586 INFO L225 Difference]: With dead ends: 158 [2021-12-14 19:47:08,586 INFO L226 Difference]: Without dead ends: 158 [2021-12-14 19:47:08,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=619, Unknown=23, NotChecked=52, Total=812 [2021-12-14 19:47:08,587 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 73 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:08,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 440 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 565 Invalid, 0 Unknown, 179 Unchecked, 0.4s Time] [2021-12-14 19:47:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-14 19:47:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2021-12-14 19:47:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 134 states have (on average 1.2611940298507462) internal successors, (169), 150 states have internal predecessors, (169), 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) [2021-12-14 19:47:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 169 transitions. [2021-12-14 19:47:08,590 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 169 transitions. Word has length 24 [2021-12-14 19:47:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:08,591 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 169 transitions. [2021-12-14 19:47:08,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 169 transitions. [2021-12-14 19:47:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 19:47:08,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:08,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:08,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:08,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:08,807 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1291386135, now seen corresponding path program 2 times [2021-12-14 19:47:08,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:47:08,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850951006] [2021-12-14 19:47:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:08,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:47:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:08,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:47:08,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850951006] [2021-12-14 19:47:08,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850951006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:47:08,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405990107] [2021-12-14 19:47:08,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:47:08,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:08,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:47:08,977 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) [2021-12-14 19:47:08,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:47:09,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:47:09,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:47:09,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-14 19:47:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:09,095 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 [2021-12-14 19:47:09,191 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:47:09,192 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 [2021-12-14 19:47:09,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:09,234 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 11 treesize of output 7 [2021-12-14 19:47:09,335 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:09,335 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 22 treesize of output 22 [2021-12-14 19:47:09,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:47:09,344 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 [2021-12-14 19:47:09,361 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-14 19:47:09,361 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-12-14 19:47:09,365 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-12-14 19:47:09,570 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-14 19:47:09,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-14 19:47:09,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2021-12-14 19:47:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:09,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:47:09,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:09,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-12-14 19:47:09,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:09,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-12-14 19:47:09,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:09,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2021-12-14 19:47:09,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:09,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2021-12-14 19:47:10,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:10,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2021-12-14 19:47:10,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:10,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2021-12-14 19:47:10,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:10,018 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 58 treesize of output 61 [2021-12-14 19:47:10,149 INFO L354 Elim1Store]: treesize reduction 30, result has 83.9 percent of original size [2021-12-14 19:47:10,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 174 treesize of output 285 [2021-12-14 19:47:10,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:10,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 196 treesize of output 222 [2021-12-14 19:47:10,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:10,239 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 133 treesize of output 119 [2021-12-14 19:47:17,608 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 19:47:17,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 1 [2021-12-14 19:47:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:17,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405990107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:47:17,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:47:17,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 29 [2021-12-14 19:47:17,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274484394] [2021-12-14 19:47:17,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:47:17,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 19:47:17,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 19:47:17,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=674, Unknown=54, NotChecked=0, Total=812 [2021-12-14 19:47:17,735 INFO L87 Difference]: Start difference. First operand 151 states and 169 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 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) [2021-12-14 19:47:18,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:18,244 INFO L93 Difference]: Finished difference Result 184 states and 201 transitions. [2021-12-14 19:47:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:47:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 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 28 [2021-12-14 19:47:18,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:18,245 INFO L225 Difference]: With dead ends: 184 [2021-12-14 19:47:18,245 INFO L226 Difference]: Without dead ends: 184 [2021-12-14 19:47:18,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=1131, Unknown=72, NotChecked=0, Total=1406 [2021-12-14 19:47:18,246 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 101 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:18,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 616 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 568 Invalid, 0 Unknown, 358 Unchecked, 0.3s Time] [2021-12-14 19:47:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-14 19:47:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 150. [2021-12-14 19:47:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 149 states have internal predecessors, (166), 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) [2021-12-14 19:47:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 166 transitions. [2021-12-14 19:47:18,250 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 166 transitions. Word has length 28 [2021-12-14 19:47:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:18,250 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 166 transitions. [2021-12-14 19:47:18,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 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) [2021-12-14 19:47:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 166 transitions. [2021-12-14 19:47:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 19:47:18,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:18,251 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] [2021-12-14 19:47:18,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:18,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:18,467 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash -406817341, now seen corresponding path program 1 times [2021-12-14 19:47:18,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:47:18,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865806761] [2021-12-14 19:47:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:18,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:47:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:18,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:47:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865806761] [2021-12-14 19:47:18,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865806761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:18,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:18,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:47:18,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825894934] [2021-12-14 19:47:18,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:18,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:47:18,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:18,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:47:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:47:18,514 INFO L87 Difference]: Start difference. First operand 150 states and 166 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-12-14 19:47:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:18,604 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2021-12-14 19:47:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:47:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2021-12-14 19:47:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:18,608 INFO L225 Difference]: With dead ends: 155 [2021-12-14 19:47:18,608 INFO L226 Difference]: Without dead ends: 155 [2021-12-14 19:47:18,608 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 [2021-12-14 19:47:18,609 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 82 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:18,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 71 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:47:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-14 19:47:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-12-14 19:47:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 134 states have (on average 1.2462686567164178) internal successors, (167), 150 states have internal predecessors, (167), 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) [2021-12-14 19:47:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2021-12-14 19:47:18,613 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 29 [2021-12-14 19:47:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:18,614 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2021-12-14 19:47:18,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 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) [2021-12-14 19:47:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2021-12-14 19:47:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 19:47:18,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:18,615 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:18,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 19:47:18,615 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1562174925, now seen corresponding path program 1 times [2021-12-14 19:47:18,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:47:18,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211462241] [2021-12-14 19:47:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:18,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:47:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:18,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:47:18,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211462241] [2021-12-14 19:47:18,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211462241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:47:18,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567042544] [2021-12-14 19:47:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:18,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:18,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:47:18,924 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) [2021-12-14 19:47:18,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:47:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:19,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-14 19:47:19,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:19,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-12-14 19:47:19,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 19:47:19,132 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:47:19,132 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 [2021-12-14 19:47:19,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:19,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:47:19,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 19:47:19,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-14 19:47:19,261 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 16 treesize of output 18 [2021-12-14 19:47:19,276 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 16 treesize of output 18 [2021-12-14 19:47:19,315 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:47:19,315 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 [2021-12-14 19:47:19,352 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 16 treesize of output 18 [2021-12-14 19:47:19,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:19,372 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 18 treesize of output 20 [2021-12-14 19:47:19,377 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 11 treesize of output 7 [2021-12-14 19:47:19,449 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 27 treesize of output 15 [2021-12-14 19:47:19,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:47:19,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:47:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:19,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:47:19,572 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_899) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 4)) 1))) is different from false [2021-12-14 19:47:19,583 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.base_109| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_109|) 0)) (not (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_109| v_ArrVal_899) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 4)) 1)))) is different from false [2021-12-14 19:47:19,739 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 19:47:19,739 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 13 treesize of output 12 [2021-12-14 19:47:19,923 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.offset_90| Int) (v_ArrVal_890 Int) (|v_ULTIMATE.start_main_~x~0#1.base_109| Int) (|v_ULTIMATE.start_main_#t~malloc3#1.base_18| Int) (v_ArrVal_893 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_90|) (not (= (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_90| v_ArrVal_890)) |v_ULTIMATE.start_main_#t~malloc3#1.base_18| v_ArrVal_893) |v_ULTIMATE.start_main_~x~0#1.base_109| v_ArrVal_899) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 4)) 1)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc3#1.base_18|) 0)) (= |v_ULTIMATE.start_main_~x~0#1.base_109| |c_ULTIMATE.start_main_~head~0#1.base|))) is different from false [2021-12-14 19:47:19,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:47:19,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:19,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-12-14 19:47:19,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:47:19,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-12-14 19:47:19,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-14 19:47:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-14 19:47:19,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567042544] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:47:19,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:47:19,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 37 [2021-12-14 19:47:19,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166228532] [2021-12-14 19:47:19,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:47:19,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 19:47:19,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:19,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 19:47:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=958, Unknown=39, NotChecked=198, Total=1332 [2021-12-14 19:47:19,978 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 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) [2021-12-14 19:47:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:20,825 INFO L93 Difference]: Finished difference Result 214 states and 232 transitions. [2021-12-14 19:47:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 19:47:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 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 29 [2021-12-14 19:47:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:20,826 INFO L225 Difference]: With dead ends: 214 [2021-12-14 19:47:20,826 INFO L226 Difference]: Without dead ends: 214 [2021-12-14 19:47:20,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=303, Invalid=1823, Unknown=48, NotChecked=276, Total=2450 [2021-12-14 19:47:20,827 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 290 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 756 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:20,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 680 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 994 Invalid, 0 Unknown, 756 Unchecked, 0.5s Time] [2021-12-14 19:47:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-14 19:47:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 162. [2021-12-14 19:47:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 145 states have (on average 1.2275862068965517) internal successors, (178), 161 states have internal predecessors, (178), 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) [2021-12-14 19:47:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 178 transitions. [2021-12-14 19:47:20,831 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 178 transitions. Word has length 29 [2021-12-14 19:47:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:20,831 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 178 transitions. [2021-12-14 19:47:20,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 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) [2021-12-14 19:47:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 178 transitions. [2021-12-14 19:47:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 19:47:20,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:20,832 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:20,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 19:47:21,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:21,048 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2055250599, now seen corresponding path program 3 times [2021-12-14 19:47:21,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:47:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313240517] [2021-12-14 19:47:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:21,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:47:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:21,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:47:21,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313240517] [2021-12-14 19:47:21,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313240517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:47:21,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932191631] [2021-12-14 19:47:21,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:47:21,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:47:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:47:21,266 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) [2021-12-14 19:47:21,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:47:21,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 19:47:21,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:47:21,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 19:47:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:21,408 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 [2021-12-14 19:47:21,471 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:47:21,472 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 [2021-12-14 19:47:21,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:21,593 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:21,593 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 22 treesize of output 22 [2021-12-14 19:47:21,610 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:21,611 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 22 treesize of output 22 [2021-12-14 19:47:21,635 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:47:21,636 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 [2021-12-14 19:47:21,670 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-14 19:47:21,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-12-14 19:47:21,804 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-14 19:47:21,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 49 [2021-12-14 19:47:21,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-14 19:47:21,896 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-12-14 19:47:21,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2021-12-14 19:47:21,901 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-14 19:47:21,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:47:21,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-14 19:47:21,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869555594] [2021-12-14 19:47:21,901 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 19:47:21,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 19:47:21,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:47:21,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 19:47:21,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-12-14 19:47:21,903 INFO L87 Difference]: Start difference. First operand 162 states and 178 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 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) [2021-12-14 19:47:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 19:47:21,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-12-14 19:47:21,905 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:21,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:47:21,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:22,127 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,SelfDestructingSolverStorable23 [2021-12-14 19:47:22,128 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@448b56a4 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-14 19:47:22,131 INFO L158 Benchmark]: Toolchain (without parser) took 31604.56ms. Allocated memory was 88.1MB in the beginning and 209.7MB in the end (delta: 121.6MB). Free memory was 66.1MB in the beginning and 62.6MB in the end (delta: 3.5MB). Peak memory consumption was 125.1MB. Max. memory is 16.1GB. [2021-12-14 19:47:22,131 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 88.1MB. Free memory is still 64.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:47:22,132 INFO L158 Benchmark]: CACSL2BoogieTranslator took 398.95ms. Allocated memory is still 88.1MB. Free memory was 65.9MB in the beginning and 49.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-14 19:47:22,132 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.03ms. Allocated memory is still 88.1MB. Free memory was 49.1MB in the beginning and 47.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 19:47:22,132 INFO L158 Benchmark]: Boogie Preprocessor took 35.69ms. Allocated memory is still 88.1MB. Free memory was 47.0MB in the beginning and 45.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 19:47:22,132 INFO L158 Benchmark]: RCFGBuilder took 530.22ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 45.3MB in the beginning and 89.1MB in the end (delta: -43.9MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-12-14 19:47:22,132 INFO L158 Benchmark]: TraceAbstraction took 30588.64ms. Allocated memory was 119.5MB in the beginning and 209.7MB in the end (delta: 90.2MB). Free memory was 89.1MB in the beginning and 62.6MB in the end (delta: 26.6MB). Peak memory consumption was 115.5MB. Max. memory is 16.1GB. [2021-12-14 19:47:22,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 88.1MB. Free memory is still 64.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 398.95ms. Allocated memory is still 88.1MB. Free memory was 65.9MB in the beginning and 49.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.03ms. Allocated memory is still 88.1MB. Free memory was 49.1MB in the beginning and 47.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.69ms. Allocated memory is still 88.1MB. Free memory was 47.0MB in the beginning and 45.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 530.22ms. Allocated memory was 88.1MB in the beginning and 119.5MB in the end (delta: 31.5MB). Free memory was 45.3MB in the beginning and 89.1MB in the end (delta: -43.9MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * TraceAbstraction took 30588.64ms. Allocated memory was 119.5MB in the beginning and 209.7MB in the end (delta: 90.2MB). Free memory was 89.1MB in the beginning and 62.6MB in the end (delta: 26.6MB). Peak memory consumption was 115.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@448b56a4 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@448b56a4: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-14 19:47:22,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:47:24,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:47:24,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:47:24,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:47:24,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:47:24,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:47:24,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:47:24,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:47:24,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:47:24,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:47:24,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:47:24,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:47:24,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:47:24,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:47:24,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:47:24,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:47:24,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:47:24,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:47:24,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:47:24,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:47:24,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:47:24,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:47:24,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:47:24,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:47:24,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:47:24,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:47:24,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:47:24,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:47:24,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:47:24,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:47:24,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:47:24,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:47:24,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:47:24,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:47:24,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:47:24,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:47:24,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:47:24,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:47:24,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:47:24,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:47:24,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:47:24,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-14 19:47:24,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:47:24,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:47:24,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:47:24,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:47:24,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:47:24,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:47:24,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:47:24,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:47:24,219 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:47:24,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:47:24,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:47:24,221 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:47:24,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:47:24,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:47:24,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:47:24,221 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:47:24,221 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:47:24,222 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:47:24,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:47:24,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:47:24,222 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 19:47:24,222 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 19:47:24,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:47:24,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:47:24,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:47:24,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:47:24,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:47:24,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:47:24,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:47:24,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:47:24,224 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 19:47:24,225 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 19:47:24,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:47:24,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 19:47:24,225 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2021-12-14 19:47:24,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:47:24,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:47:24,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:47:24,572 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:47:24,573 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:47:24,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-12-14 19:47:24,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb997447b/c7f985f1ad754931bfb88c52bb3fd698/FLAG2bc687cd3 [2021-12-14 19:47:25,115 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:47:25,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2021-12-14 19:47:25,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb997447b/c7f985f1ad754931bfb88c52bb3fd698/FLAG2bc687cd3 [2021-12-14 19:47:25,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb997447b/c7f985f1ad754931bfb88c52bb3fd698 [2021-12-14 19:47:25,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:47:25,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:47:25,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:47:25,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:47:25,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:47:25,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:25" (1/1) ... [2021-12-14 19:47:25,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ce2675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:25, skipping insertion in model container [2021-12-14 19:47:25,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:25" (1/1) ... [2021-12-14 19:47:25,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:47:25,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:47:25,954 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-12-14 19:47:25,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:47:25,976 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:47:26,021 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i[22605,22618] [2021-12-14 19:47:26,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:47:26,061 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:47:26,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26 WrapperNode [2021-12-14 19:47:26,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:47:26,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:47:26,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:47:26,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:47:26,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,126 INFO L137 Inliner]: procedures = 122, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 109 [2021-12-14 19:47:26,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:47:26,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:47:26,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:47:26,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:47:26,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:47:26,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:47:26,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:47:26,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:47:26,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (1/1) ... [2021-12-14 19:47:26,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:47:26,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:47:26,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 19:47:26,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 19:47:26,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-14 19:47:26,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:47:26,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:47:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 19:47:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 19:47:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:47:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-14 19:47:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 19:47:26,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:47:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:47:26,393 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:47:26,395 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:47:26,795 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:47:26,801 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:47:26,801 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-14 19:47:26,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:26 BoogieIcfgContainer [2021-12-14 19:47:26,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:47:26,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:47:26,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:47:26,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:47:26,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:47:25" (1/3) ... [2021-12-14 19:47:26,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9e48b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:26, skipping insertion in model container [2021-12-14 19:47:26,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:26" (2/3) ... [2021-12-14 19:47:26,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9e48b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:26, skipping insertion in model container [2021-12-14 19:47:26,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:26" (3/3) ... [2021-12-14 19:47:26,810 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2021-12-14 19:47:26,814 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:47:26,814 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-12-14 19:47:26,848 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:47:26,854 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 [2021-12-14 19:47:26,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-12-14 19:47:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 51 states have (on average 2.196078431372549) internal successors, (112), 96 states have internal predecessors, (112), 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) [2021-12-14 19:47:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:47:26,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:26,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:47:26,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-14 19:47:26,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:26,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490591016] [2021-12-14 19:47:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:26,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:26,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:26,901 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:26,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 19:47:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 19:47:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:27,054 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 [2021-12-14 19:47:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:27,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:27,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:27,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490591016] [2021-12-14 19:47:27,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490591016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:27,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:27,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:47:27,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896870366] [2021-12-14 19:47:27,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:47:27,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:47:27,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:47:27,108 INFO L87 Difference]: Start difference. First operand has 97 states, 51 states have (on average 2.196078431372549) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:47:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:27,347 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2021-12-14 19:47:27,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:47:27,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-14 19:47:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:27,357 INFO L225 Difference]: With dead ends: 125 [2021-12-14 19:47:27,357 INFO L226 Difference]: Without dead ends: 121 [2021-12-14 19:47:27,358 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 [2021-12-14 19:47:27,361 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 83 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:27,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 108 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:47:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-14 19:47:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-12-14 19:47:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 2.0) internal successors, (98), 91 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2021-12-14 19:47:27,400 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 3 [2021-12-14 19:47:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:27,401 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2021-12-14 19:47:27,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:47:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2021-12-14 19:47:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-14 19:47:27,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:27,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-14 19:47:27,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:27,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:27,616 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-14 19:47:27,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:27,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043015466] [2021-12-14 19:47:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:27,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:27,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:27,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:27,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 19:47:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:27,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:47:27,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:27,697 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 [2021-12-14 19:47:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:27,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:27,707 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:27,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043015466] [2021-12-14 19:47:27,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043015466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:27,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:27,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:47:27,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858580378] [2021-12-14 19:47:27,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:27,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:47:27,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:27,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:47:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:47:27,717 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:47:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:27,910 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2021-12-14 19:47:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:47:27,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2021-12-14 19:47:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:27,913 INFO L225 Difference]: With dead ends: 119 [2021-12-14 19:47:27,913 INFO L226 Difference]: Without dead ends: 119 [2021-12-14 19:47:27,913 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 [2021-12-14 19:47:27,914 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 79 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:27,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 104 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:47:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-14 19:47:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2021-12-14 19:47:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 89 states have internal predecessors, (96), 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) [2021-12-14 19:47:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-12-14 19:47:27,923 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 3 [2021-12-14 19:47:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:27,923 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-12-14 19:47:27,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-12-14 19:47:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-12-14 19:47:27,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:47:27,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:27,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:27,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:28,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:28,134 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:28,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:28,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1803027173, now seen corresponding path program 1 times [2021-12-14 19:47:28,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:28,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624739068] [2021-12-14 19:47:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:28,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:28,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:28,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:28,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 19:47:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 19:47:28,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:28,229 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 [2021-12-14 19:47:28,286 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-14 19:47:28,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-12-14 19:47:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:28,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:28,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624739068] [2021-12-14 19:47:28,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624739068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:28,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:28,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:47:28,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694461330] [2021-12-14 19:47:28,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:28,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:47:28,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:47:28,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:47:28,321 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:28,575 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-12-14 19:47:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:47:28,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 19:47:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:28,576 INFO L225 Difference]: With dead ends: 93 [2021-12-14 19:47:28,576 INFO L226 Difference]: Without dead ends: 93 [2021-12-14 19:47:28,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:47:28,578 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 120 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:28,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 38 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:47:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-14 19:47:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-12-14 19:47:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 84 states have internal predecessors, (97), 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) [2021-12-14 19:47:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2021-12-14 19:47:28,584 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 7 [2021-12-14 19:47:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:28,584 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2021-12-14 19:47:28,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2021-12-14 19:47:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:47:28,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:28,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:28,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:28,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:28,786 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1803027174, now seen corresponding path program 1 times [2021-12-14 19:47:28,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:28,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862602881] [2021-12-14 19:47:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:28,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:28,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:28,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:28,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-14 19:47:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:28,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:47:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:28,882 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 [2021-12-14 19:47:28,950 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:28,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:47:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:28,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:28,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862602881] [2021-12-14 19:47:28,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862602881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:28,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:28,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:47:28,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868565021] [2021-12-14 19:47:28,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:28,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:47:28,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:47:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:47:28,966 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:29,278 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-12-14 19:47:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:47:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-14 19:47:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:29,279 INFO L225 Difference]: With dead ends: 113 [2021-12-14 19:47:29,279 INFO L226 Difference]: Without dead ends: 113 [2021-12-14 19:47:29,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:47:29,281 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 121 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:29,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 53 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:47:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-14 19:47:29,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2021-12-14 19:47:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-12-14 19:47:29,287 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 7 [2021-12-14 19:47:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:29,287 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-12-14 19:47:29,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-12-14 19:47:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:47:29,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:29,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:29,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:29,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:29,504 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 406735527, now seen corresponding path program 1 times [2021-12-14 19:47:29,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744826877] [2021-12-14 19:47:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:29,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:29,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:29,506 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:29,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-14 19:47:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-14 19:47:29,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:29,582 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 [2021-12-14 19:47:29,595 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 11 treesize of output 7 [2021-12-14 19:47:29,617 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 26 treesize of output 18 [2021-12-14 19:47:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:29,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:29,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:29,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744826877] [2021-12-14 19:47:29,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744826877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:29,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:29,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:47:29,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147850433] [2021-12-14 19:47:29,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:29,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:47:29,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:47:29,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:47:29,647 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-12-14 19:47:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:30,048 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2021-12-14 19:47:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:47:30,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 [2021-12-14 19:47:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:30,050 INFO L225 Difference]: With dead ends: 99 [2021-12-14 19:47:30,050 INFO L226 Difference]: Without dead ends: 99 [2021-12-14 19:47:30,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:47:30,051 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:30,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 147 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:47:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-14 19:47:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-12-14 19:47:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.5068493150684932) internal successors, (110), 97 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2021-12-14 19:47:30,057 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 11 [2021-12-14 19:47:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:30,057 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2021-12-14 19:47:30,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-12-14 19:47:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2021-12-14 19:47:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-14 19:47:30,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:30,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:30,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:30,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:30,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:30,264 INFO L85 PathProgramCache]: Analyzing trace with hash 406735528, now seen corresponding path program 1 times [2021-12-14 19:47:30,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313249464] [2021-12-14 19:47:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:30,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:30,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:30,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:30,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-14 19:47:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:47:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:30,352 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 [2021-12-14 19:47:30,371 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 11 treesize of output 7 [2021-12-14 19:47:30,377 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 11 treesize of output 7 [2021-12-14 19:47:30,419 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 17 treesize of output 9 [2021-12-14 19:47:30,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:47:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:30,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:30,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:30,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313249464] [2021-12-14 19:47:30,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313249464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:30,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:30,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:47:30,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556996875] [2021-12-14 19:47:30,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:30,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:47:30,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:30,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:47:30,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:47:30,460 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-12-14 19:47:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:30,836 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2021-12-14 19:47:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:47:30,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 [2021-12-14 19:47:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:30,837 INFO L225 Difference]: With dead ends: 97 [2021-12-14 19:47:30,837 INFO L226 Difference]: Without dead ends: 97 [2021-12-14 19:47:30,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:47:30,838 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 11 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:30,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 189 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:47:30,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-14 19:47:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2021-12-14 19:47:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.463768115942029) internal successors, (101), 89 states have internal predecessors, (101), 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) [2021-12-14 19:47:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2021-12-14 19:47:30,851 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 11 [2021-12-14 19:47:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:30,851 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2021-12-14 19:47:30,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-12-14 19:47:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2021-12-14 19:47:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 19:47:30,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:30,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:30,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:31,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:31,065 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:31,065 INFO L85 PathProgramCache]: Analyzing trace with hash 813754491, now seen corresponding path program 1 times [2021-12-14 19:47:31,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:31,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732241706] [2021-12-14 19:47:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:31,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:31,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:31,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-14 19:47:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:31,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-14 19:47:31,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:31,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:31,149 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 11 treesize of output 7 [2021-12-14 19:47:31,185 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-14 19:47:31,185 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 21 treesize of output 20 [2021-12-14 19:47:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:47:31,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 19:47:31,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:47:31,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:47:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:31,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:31,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732241706] [2021-12-14 19:47:31,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732241706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:31,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:31,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:47:31,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321187064] [2021-12-14 19:47:31,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:31,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:47:31,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:47:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:47:31,275 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:31,516 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2021-12-14 19:47:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:47:31,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 19:47:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:31,517 INFO L225 Difference]: With dead ends: 99 [2021-12-14 19:47:31,517 INFO L226 Difference]: Without dead ends: 99 [2021-12-14 19:47:31,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:47:31,518 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:31,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:47:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-14 19:47:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2021-12-14 19:47:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 73 states have (on average 1.4657534246575343) internal successors, (107), 93 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2021-12-14 19:47:31,522 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 13 [2021-12-14 19:47:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:31,522 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2021-12-14 19:47:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2021-12-14 19:47:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 19:47:31,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:31,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:31,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:31,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:31,731 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:31,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1626848531, now seen corresponding path program 1 times [2021-12-14 19:47:31,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:31,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041651571] [2021-12-14 19:47:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:31,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:31,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:31,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:31,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-14 19:47:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:47:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:31,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 19:47:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:47:31,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-14 19:47:31,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:47:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:31,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:31,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:31,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041651571] [2021-12-14 19:47:31,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041651571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:31,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:31,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:47:31,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052359162] [2021-12-14 19:47:31,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:31,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:47:31,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:47:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:47:31,921 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:32,207 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-12-14 19:47:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:47:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 19:47:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:32,208 INFO L225 Difference]: With dead ends: 124 [2021-12-14 19:47:32,208 INFO L226 Difference]: Without dead ends: 124 [2021-12-14 19:47:32,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:47:32,209 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 36 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:32,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 211 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:47:32,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-14 19:47:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2021-12-14 19:47:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 96 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2021-12-14 19:47:32,213 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 16 [2021-12-14 19:47:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:32,213 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2021-12-14 19:47:32,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2021-12-14 19:47:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:47:32,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:32,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:32,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-14 19:47:32,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:32,415 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:32,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:32,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1105672240, now seen corresponding path program 1 times [2021-12-14 19:47:32,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:32,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547504332] [2021-12-14 19:47:32,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:32,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:32,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:32,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:32,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-14 19:47:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:32,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 19:47:32,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:32,508 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 [2021-12-14 19:47:32,536 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-14 19:47:32,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-12-14 19:47:32,569 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 11 treesize of output 7 [2021-12-14 19:47:32,651 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 26 treesize of output 18 [2021-12-14 19:47:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:32,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:32,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547504332] [2021-12-14 19:47:32,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547504332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:32,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:32,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:47:32,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553883956] [2021-12-14 19:47:32,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:32,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:47:32,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:32,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:47:32,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:47:32,687 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-12-14 19:47:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:33,180 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-12-14 19:47:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:47:33,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 17 [2021-12-14 19:47:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:33,182 INFO L225 Difference]: With dead ends: 128 [2021-12-14 19:47:33,182 INFO L226 Difference]: Without dead ends: 128 [2021-12-14 19:47:33,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:47:33,183 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:33,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 96 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:47:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-14 19:47:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 101. [2021-12-14 19:47:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.45) internal successors, (116), 100 states have internal predecessors, (116), 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) [2021-12-14 19:47:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2021-12-14 19:47:33,187 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 17 [2021-12-14 19:47:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:33,188 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2021-12-14 19:47:33,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-12-14 19:47:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2021-12-14 19:47:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:47:33,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:33,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:33,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-14 19:47:33,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:33,399 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:33,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1105672241, now seen corresponding path program 1 times [2021-12-14 19:47:33,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:33,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066911242] [2021-12-14 19:47:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:33,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:33,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:33,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:33,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-14 19:47:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:33,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 19:47:33,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:33,498 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 [2021-12-14 19:47:33,554 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:33,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 19:47:33,587 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 11 treesize of output 7 [2021-12-14 19:47:33,593 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 11 treesize of output 7 [2021-12-14 19:47:33,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-14 19:47:33,676 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 17 treesize of output 9 [2021-12-14 19:47:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:33,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:33,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:33,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066911242] [2021-12-14 19:47:33,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066911242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:33,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:33,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:47:33,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800544220] [2021-12-14 19:47:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:33,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:47:33,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:47:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:47:33,730 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-12-14 19:47:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:34,333 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-12-14 19:47:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:47:34,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 17 [2021-12-14 19:47:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:34,334 INFO L225 Difference]: With dead ends: 148 [2021-12-14 19:47:34,334 INFO L226 Difference]: Without dead ends: 148 [2021-12-14 19:47:34,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:47:34,335 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 198 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:34,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 132 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 19:47:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-14 19:47:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 103. [2021-12-14 19:47:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 82 states have (on average 1.4390243902439024) internal successors, (118), 102 states have internal predecessors, (118), 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) [2021-12-14 19:47:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2021-12-14 19:47:34,339 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 17 [2021-12-14 19:47:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2021-12-14 19:47:34,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-12-14 19:47:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2021-12-14 19:47:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:47:34,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:34,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:47:34,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:34,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:34,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:34,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1694103573, now seen corresponding path program 1 times [2021-12-14 19:47:34,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:34,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576582973] [2021-12-14 19:47:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:34,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:34,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:34,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:34,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-14 19:47:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 19:47:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:34,644 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 [2021-12-14 19:47:34,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-14 19:47:34,697 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-14 19:47:34,698 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 18 treesize of output 18 [2021-12-14 19:47:34,720 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 16 treesize of output 18 [2021-12-14 19:47:34,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:34,753 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 20 treesize of output 22 [2021-12-14 19:47:34,757 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 11 treesize of output 7 [2021-12-14 19:47:34,834 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 33 treesize of output 21 [2021-12-14 19:47:34,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-14 19:47:34,900 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 19 treesize of output 7 [2021-12-14 19:47:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:34,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:34,915 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:34,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576582973] [2021-12-14 19:47:34,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576582973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:34,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:34,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 19:47:34,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83906952] [2021-12-14 19:47:34,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:34,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:47:34,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:47:34,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:47:34,916 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2021-12-14 19:47:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:35,826 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2021-12-14 19:47:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:47:35,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 19 [2021-12-14 19:47:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:35,828 INFO L225 Difference]: With dead ends: 163 [2021-12-14 19:47:35,828 INFO L226 Difference]: Without dead ends: 163 [2021-12-14 19:47:35,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-14 19:47:35,829 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 111 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:35,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 273 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 19:47:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-14 19:47:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-12-14 19:47:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 113 states have internal predecessors, (130), 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) [2021-12-14 19:47:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-12-14 19:47:35,832 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 19 [2021-12-14 19:47:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:35,832 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-12-14 19:47:35,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2021-12-14 19:47:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-12-14 19:47:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:47:35,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:35,833 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] [2021-12-14 19:47:35,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:36,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:36,043 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 976774480, now seen corresponding path program 1 times [2021-12-14 19:47:36,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:36,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156196072] [2021-12-14 19:47:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:36,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:36,045 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:36,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-14 19:47:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:36,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:47:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:36,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:36,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-14 19:47:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:36,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:47:36,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 19:47:36,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156196072] [2021-12-14 19:47:36,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156196072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:47:36,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:47:36,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:47:36,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313943590] [2021-12-14 19:47:36,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:47:36,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:47:36,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 19:47:36,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:47:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:47:36,199 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:47:36,578 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2021-12-14 19:47:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:47:36,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-14 19:47:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:47:36,579 INFO L225 Difference]: With dead ends: 152 [2021-12-14 19:47:36,580 INFO L226 Difference]: Without dead ends: 152 [2021-12-14 19:47:36,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:47:36,580 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 182 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:47:36,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 189 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:47:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-14 19:47:36,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2021-12-14 19:47:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.3655913978494623) internal successors, (127), 113 states have internal predecessors, (127), 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) [2021-12-14 19:47:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2021-12-14 19:47:36,584 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 20 [2021-12-14 19:47:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:47:36,584 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2021-12-14 19:47:36,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:47:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2021-12-14 19:47:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:47:36,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:47:36,585 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] [2021-12-14 19:47:36,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:47:36,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 19:47:36,793 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 41 more)] === [2021-12-14 19:47:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:47:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash -531988400, now seen corresponding path program 1 times [2021-12-14 19:47:36,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 19:47:36,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949690294] [2021-12-14 19:47:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:47:36,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 19:47:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 19:47:36,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-14 19:47:36,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-14 19:47:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:47:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-14 19:47:36,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:47:36,908 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 [2021-12-14 19:47:36,969 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-14 19:47:36,969 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 23 treesize of output 30 [2021-12-14 19:47:37,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:47:37,138 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:37,138 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 34 treesize of output 32 [2021-12-14 19:47:37,162 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 19:47:37,162 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-12-14 19:47:37,272 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 34 treesize of output 22 [2021-12-14 19:47:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:47:37,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:47:37,492 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_321 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_321) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))))))))))) (_ bv1 1)))) is different from false [2021-12-14 19:47:37,501 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_321 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_321) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))))))))))))))) is different from false [2021-12-14 19:47:37,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:37,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2021-12-14 19:47:37,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:47:37,534 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 70 treesize of output 73 [2021-12-14 19:47:37,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27