./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 20ed64ec 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-rb-sentinel-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b39a262e58c4b59fb1c3af72226955d8a31f5200 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:26:22,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:26:22,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:26:22,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:26:22,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:26:22,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:26:22,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:26:22,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:26:22,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:26:22,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:26:22,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:26:22,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:26:22,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:26:22,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:26:22,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:26:22,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:26:22,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:26:22,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:26:22,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:26:22,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:26:22,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:26:22,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:26:22,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:26:22,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:26:22,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:26:22,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:26:22,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:26:22,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:26:22,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:26:22,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:26:22,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:26:22,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:26:22,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:26:22,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:26:22,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:26:22,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:26:22,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:26:22,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:26:22,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:26:22,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:26:22,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:26:22,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-08-27 04:26:22,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:26:22,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:26:22,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:26:22,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:26:22,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:26:22,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:26:22,321 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:26:22,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:26:22,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:26:22,322 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:26:22,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:26:22,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:26:22,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:26:22,323 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:26:22,323 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:26:22,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:26:22,323 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:26:22,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:26:22,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:26:22,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:26:22,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:26:22,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:26:22,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:26:22,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:26:22,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:26:22,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:26:22,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:26:22,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:26:22,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b39a262e58c4b59fb1c3af72226955d8a31f5200 [2021-08-27 04:26:22,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:26:22,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:26:22,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:26:22,586 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:26:22,587 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:26:22,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2021-08-27 04:26:22,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6453fe124/2a4047a3e8eb482a9a6c59c7f2afc5c3/FLAGbef63915e [2021-08-27 04:26:23,083 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:26:23,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-sentinel-2.i [2021-08-27 04:26:23,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6453fe124/2a4047a3e8eb482a9a6c59c7f2afc5c3/FLAGbef63915e [2021-08-27 04:26:23,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6453fe124/2a4047a3e8eb482a9a6c59c7f2afc5c3 [2021-08-27 04:26:23,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:26:23,118 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:26:23,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:26:23,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:26:23,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:26:23,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4306774f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23, skipping insertion in model container [2021-08-27 04:26:23,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:26:23,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:26:23,385 WARN L228 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-rb-sentinel-2.i[22534,22547] [2021-08-27 04:26:23,388 WARN L228 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-rb-sentinel-2.i[22606,22619] [2021-08-27 04:26:23,392 WARN L228 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-rb-sentinel-2.i[22746,22759] [2021-08-27 04:26:23,393 WARN L228 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-rb-sentinel-2.i[22820,22833] [2021-08-27 04:26:23,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:26:23,413 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:26:23,456 WARN L228 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-rb-sentinel-2.i[22534,22547] [2021-08-27 04:26:23,461 WARN L228 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-rb-sentinel-2.i[22606,22619] [2021-08-27 04:26:23,462 WARN L228 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-rb-sentinel-2.i[22746,22759] [2021-08-27 04:26:23,463 WARN L228 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-rb-sentinel-2.i[22820,22833] [2021-08-27 04:26:23,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:26:23,484 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:26:23,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23 WrapperNode [2021-08-27 04:26:23,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:26:23,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:26:23,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:26:23,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:26:23,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:26:23,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:26:23,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:26:23,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:26:23,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (1/1) ... [2021-08-27 04:26:23,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:26:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:23,610 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) [2021-08-27 04:26:23,656 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 [2021-08-27 04:26:23,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:26:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:26:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 04:26:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:26:23,683 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:26:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:26:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:26:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:26:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:26:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:26:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:26:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:26:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:26:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:26:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:26:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:26:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:26:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:26:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:26:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:26:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:26:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:26:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:26:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:26:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:26:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:26:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:26:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:26:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:26:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:26:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:26:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:26:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:26:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:26:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:26:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:26:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:26:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:26:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:26:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:26:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:26:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:26:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:26:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:26:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:26:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:26:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:26:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:26:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:26:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:26:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:26:23,690 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:26:23,691 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:26:23,691 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:26:23,691 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:26:23,691 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:26:23,691 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:26:23,691 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:26:23,692 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 04:26:23,692 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:26:23,692 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:26:23,693 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:26:23,693 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:26:23,693 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:26:23,693 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:26:23,693 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:26:23,694 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:26:23,694 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:26:23,694 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:26:23,694 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:26:23,694 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:26:23,694 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:26:23,694 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:26:23,695 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:26:23,695 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:26:23,695 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:26:23,695 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:26:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:26:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:26:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:26:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:26:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:26:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:26:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:26:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:26:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:26:23,698 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:26:23,698 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:26:23,698 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:26:23,698 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:26:23,698 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:26:23,698 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:26:23,699 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 04:26:23,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 04:26:23,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:26:23,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:26:23,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:26:23,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 04:26:23,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:26:24,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:26:24,397 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-27 04:26:24,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:26:24 BoogieIcfgContainer [2021-08-27 04:26:24,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:26:24,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:26:24,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:26:24,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:26:24,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:26:23" (1/3) ... [2021-08-27 04:26:24,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259451f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:26:24, skipping insertion in model container [2021-08-27 04:26:24,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:23" (2/3) ... [2021-08-27 04:26:24,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@259451f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:26:24, skipping insertion in model container [2021-08-27 04:26:24,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:26:24" (3/3) ... [2021-08-27 04:26:24,411 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-sentinel-2.i [2021-08-27 04:26:24,414 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:26:24,414 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2021-08-27 04:26:24,449 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:26:24,456 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, mConcurrency=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 [2021-08-27 04:26:24,457 INFO L340 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2021-08-27 04:26:24,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 72 states have (on average 2.138888888888889) internal successors, (154), 133 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:26:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 04:26:24,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:24,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:24,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:24,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:24,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1985602549, now seen corresponding path program 1 times [2021-08-27 04:26:24,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:24,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312891165] [2021-08-27 04:26:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:24,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:24,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:24,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:24,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312891165] [2021-08-27 04:26:24,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312891165] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:24,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:24,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:26:24,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125521520] [2021-08-27 04:26:24,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:24,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:24,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:24,704 INFO L87 Difference]: Start difference. First operand has 138 states, 72 states have (on average 2.138888888888889) internal successors, (154), 133 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:25,082 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2021-08-27 04:26:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-08-27 04:26:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:25,089 INFO L225 Difference]: With dead ends: 166 [2021-08-27 04:26:25,089 INFO L226 Difference]: Without dead ends: 163 [2021-08-27 04:26:25,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-27 04:26:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2021-08-27 04:26:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 75 states have (on average 1.8933333333333333) internal successors, (142), 133 states have internal predecessors, (142), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2021-08-27 04:26:25,126 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 7 [2021-08-27 04:26:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:25,126 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2021-08-27 04:26:25,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2021-08-27 04:26:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 04:26:25,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:25,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:25,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:26:25,128 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:25,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1985602550, now seen corresponding path program 1 times [2021-08-27 04:26:25,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:25,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059250262] [2021-08-27 04:26:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:25,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:25,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:25,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:25,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059250262] [2021-08-27 04:26:25,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059250262] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:25,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:25,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:26:25,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250000614] [2021-08-27 04:26:25,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:25,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:25,198 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:25,514 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2021-08-27 04:26:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:25,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-08-27 04:26:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:25,516 INFO L225 Difference]: With dead ends: 134 [2021-08-27 04:26:25,516 INFO L226 Difference]: Without dead ends: 134 [2021-08-27 04:26:25,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-27 04:26:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-08-27 04:26:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.84) internal successors, (138), 130 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2021-08-27 04:26:25,521 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 7 [2021-08-27 04:26:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:25,521 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2021-08-27 04:26:25,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2021-08-27 04:26:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:26:25,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:25,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:25,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:26:25,522 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1499047333, now seen corresponding path program 1 times [2021-08-27 04:26:25,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:25,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7407605] [2021-08-27 04:26:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:25,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:25,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:25,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:25,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7407605] [2021-08-27 04:26:25,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7407605] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:25,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:25,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:26:25,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136774605] [2021-08-27 04:26:25,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:25,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:25,599 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:25,781 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2021-08-27 04:26:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:25,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:26:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:25,783 INFO L225 Difference]: With dead ends: 131 [2021-08-27 04:26:25,783 INFO L226 Difference]: Without dead ends: 131 [2021-08-27 04:26:25,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-08-27 04:26:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2021-08-27 04:26:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 76 states have (on average 1.763157894736842) internal successors, (134), 125 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2021-08-27 04:26:25,790 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 10 [2021-08-27 04:26:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:25,790 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2021-08-27 04:26:25,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:25,791 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2021-08-27 04:26:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:26:25,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:25,791 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:25,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:26:25,791 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1499047332, now seen corresponding path program 1 times [2021-08-27 04:26:25,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:25,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389566232] [2021-08-27 04:26:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:25,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:25,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:25,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389566232] [2021-08-27 04:26:25,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389566232] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:25,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:25,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:26:25,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712110145] [2021-08-27 04:26:25,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:25,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:25,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:25,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:25,848 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:26,036 INFO L93 Difference]: Finished difference Result 147 states and 153 transitions. [2021-08-27 04:26:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:26,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:26:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:26,037 INFO L225 Difference]: With dead ends: 147 [2021-08-27 04:26:26,038 INFO L226 Difference]: Without dead ends: 147 [2021-08-27 04:26:26,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-27 04:26:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 134. [2021-08-27 04:26:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 83 states have (on average 1.6746987951807228) internal successors, (139), 130 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 142 transitions. [2021-08-27 04:26:26,043 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 142 transitions. Word has length 10 [2021-08-27 04:26:26,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:26,043 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 142 transitions. [2021-08-27 04:26:26,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 142 transitions. [2021-08-27 04:26:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:26:26,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:26,044 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:26,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:26:26,044 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:26,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:26,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1074084415, now seen corresponding path program 1 times [2021-08-27 04:26:26,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:26,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036012975] [2021-08-27 04:26:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:26,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:26,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:26,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:26,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036012975] [2021-08-27 04:26:26,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036012975] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:26,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:26,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:26:26,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258724681] [2021-08-27 04:26:26,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:26:26,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:26,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:26:26,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:26:26,144 INFO L87 Difference]: Start difference. First operand 134 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:26,328 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2021-08-27 04:26:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:26:26,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 04:26:26,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:26,330 INFO L225 Difference]: With dead ends: 138 [2021-08-27 04:26:26,330 INFO L226 Difference]: Without dead ends: 138 [2021-08-27 04:26:26,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:26:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-27 04:26:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 125. [2021-08-27 04:26:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 85 states have (on average 1.5529411764705883) internal successors, (132), 121 states have internal predecessors, (132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-08-27 04:26:26,334 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 15 [2021-08-27 04:26:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:26,334 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-08-27 04:26:26,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-08-27 04:26:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:26:26,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:26,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:26,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:26:26,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1074084414, now seen corresponding path program 1 times [2021-08-27 04:26:26,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:26,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519687408] [2021-08-27 04:26:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:26,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:26,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:26,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519687408] [2021-08-27 04:26:26,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519687408] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:26,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:26,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:26,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049138578] [2021-08-27 04:26:26,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:26:26,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:26,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:26:26,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:26,465 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:26,727 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2021-08-27 04:26:26,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:26:26,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 04:26:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:26,729 INFO L225 Difference]: With dead ends: 162 [2021-08-27 04:26:26,729 INFO L226 Difference]: Without dead ends: 162 [2021-08-27 04:26:26,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:26:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-08-27 04:26:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-08-27 04:26:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 93 states have (on average 1.5053763440860215) internal successors, (140), 128 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2021-08-27 04:26:26,733 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 15 [2021-08-27 04:26:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:26,733 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2021-08-27 04:26:26,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2021-08-27 04:26:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:26:26,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:26,734 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:26,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:26:26,734 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:26,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1402989331, now seen corresponding path program 1 times [2021-08-27 04:26:26,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:26,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156516244] [2021-08-27 04:26:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:26,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:26,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:26,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:26,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156516244] [2021-08-27 04:26:26,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156516244] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:26,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:26,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:26,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584781539] [2021-08-27 04:26:26,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:26:26,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:26,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:26:26,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:26:26,792 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:26,979 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2021-08-27 04:26:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:26:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 04:26:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:26,981 INFO L225 Difference]: With dead ends: 171 [2021-08-27 04:26:26,981 INFO L226 Difference]: Without dead ends: 171 [2021-08-27 04:26:26,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:26:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-27 04:26:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2021-08-27 04:26:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 95 states have (on average 1.4842105263157894) internal successors, (141), 129 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2021-08-27 04:26:26,985 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 17 [2021-08-27 04:26:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:26,985 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2021-08-27 04:26:26,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2021-08-27 04:26:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:26:26,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:26,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:26,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:26:26,986 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash 364071747, now seen corresponding path program 1 times [2021-08-27 04:26:26,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:26,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481383536] [2021-08-27 04:26:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:26,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:27,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:27,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:27,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481383536] [2021-08-27 04:26:27,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481383536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:27,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:27,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:27,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919290964] [2021-08-27 04:26:27,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:26:27,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:26:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:27,053 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:27,306 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2021-08-27 04:26:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:26:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 04:26:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:27,307 INFO L225 Difference]: With dead ends: 133 [2021-08-27 04:26:27,307 INFO L226 Difference]: Without dead ends: 133 [2021-08-27 04:26:27,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:26:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-27 04:26:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-08-27 04:26:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 128 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2021-08-27 04:26:27,310 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 19 [2021-08-27 04:26:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:27,311 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2021-08-27 04:26:27,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2021-08-27 04:26:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:26:27,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:27,311 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:27,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:26:27,312 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash 364071748, now seen corresponding path program 1 times [2021-08-27 04:26:27,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:27,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558255441] [2021-08-27 04:26:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:27,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:27,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:27,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:27,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558255441] [2021-08-27 04:26:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558255441] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:27,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:27,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:27,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294752626] [2021-08-27 04:26:27,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:26:27,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:27,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:26:27,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:27,411 INFO L87 Difference]: Start difference. First operand 132 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:27,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:27,699 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-08-27 04:26:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:26:27,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 04:26:27,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:27,700 INFO L225 Difference]: With dead ends: 134 [2021-08-27 04:26:27,700 INFO L226 Difference]: Without dead ends: 134 [2021-08-27 04:26:27,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:26:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-08-27 04:26:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2021-08-27 04:26:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 123 states have internal predecessors, (135), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2021-08-27 04:26:27,704 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 19 [2021-08-27 04:26:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:27,705 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2021-08-27 04:26:27,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2021-08-27 04:26:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:26:27,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:27,705 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:27,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 04:26:27,706 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash -2124403342, now seen corresponding path program 1 times [2021-08-27 04:26:27,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:27,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040300285] [2021-08-27 04:26:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:27,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:27,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:27,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:27,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040300285] [2021-08-27 04:26:27,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040300285] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:27,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:27,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 04:26:27,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437839521] [2021-08-27 04:26:27,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:26:27,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:27,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:26:27,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:26:27,874 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:28,132 INFO L93 Difference]: Finished difference Result 188 states and 204 transitions. [2021-08-27 04:26:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:26:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 04:26:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:28,133 INFO L225 Difference]: With dead ends: 188 [2021-08-27 04:26:28,134 INFO L226 Difference]: Without dead ends: 188 [2021-08-27 04:26:28,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:26:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-27 04:26:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 134. [2021-08-27 04:26:28,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 130 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-08-27 04:26:28,138 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 20 [2021-08-27 04:26:28,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:28,138 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-08-27 04:26:28,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-08-27 04:26:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:26:28,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:28,139 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:28,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:26:28,140 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:28,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1088936686, now seen corresponding path program 1 times [2021-08-27 04:26:28,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:28,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838985221] [2021-08-27 04:26:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:28,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:28,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:28,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:28,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838985221] [2021-08-27 04:26:28,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838985221] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:28,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:28,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:28,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221829668] [2021-08-27 04:26:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:26:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:26:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:26:28,226 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:28,386 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-08-27 04:26:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:26:28,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-08-27 04:26:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:28,387 INFO L225 Difference]: With dead ends: 138 [2021-08-27 04:26:28,388 INFO L226 Difference]: Without dead ends: 138 [2021-08-27 04:26:28,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-27 04:26:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2021-08-27 04:26:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 101 states have (on average 1.396039603960396) internal successors, (141), 129 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2021-08-27 04:26:28,390 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 27 [2021-08-27 04:26:28,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:28,390 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2021-08-27 04:26:28,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2021-08-27 04:26:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:26:28,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:28,394 INFO L512 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] [2021-08-27 04:26:28,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:26:28,394 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:28,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:28,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1130954939, now seen corresponding path program 1 times [2021-08-27 04:26:28,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:28,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684040792] [2021-08-27 04:26:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:28,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:28,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:28,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:28,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684040792] [2021-08-27 04:26:28,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684040792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:28,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879653475] [2021-08-27 04:26:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:28,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:28,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:28,505 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) [2021-08-27 04:26:28,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:26:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:28,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 04:26:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:28,748 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 [2021-08-27 04:26:28,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 04:26:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:28,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-08-27 04:26:28,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:28,805 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 27 treesize of output 11 [2021-08-27 04:26:29,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-27 04:26:29,030 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 18 treesize of output 10 [2021-08-27 04:26:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:29,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879653475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:29,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:29,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-27 04:26:29,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230300137] [2021-08-27 04:26:29,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:26:29,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:26:29,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:26:29,049 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:29,373 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-08-27 04:26:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:26:29,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-08-27 04:26:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:29,375 INFO L225 Difference]: With dead ends: 160 [2021-08-27 04:26:29,375 INFO L226 Difference]: Without dead ends: 160 [2021-08-27 04:26:29,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:26:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-27 04:26:29,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2021-08-27 04:26:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 136 states have internal predecessors, (148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 151 transitions. [2021-08-27 04:26:29,379 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 151 transitions. Word has length 27 [2021-08-27 04:26:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:29,380 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 151 transitions. [2021-08-27 04:26:29,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 151 transitions. [2021-08-27 04:26:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 04:26:29,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:29,383 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:29,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:29,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-27 04:26:29,597 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1099482672, now seen corresponding path program 1 times [2021-08-27 04:26:29,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:29,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516980148] [2021-08-27 04:26:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:29,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:29,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:29,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:29,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516980148] [2021-08-27 04:26:29,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516980148] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:29,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:29,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:29,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220119232] [2021-08-27 04:26:29,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:26:29,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:26:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:29,676 INFO L87 Difference]: Start difference. First operand 140 states and 151 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:29,882 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2021-08-27 04:26:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:26:29,883 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-08-27 04:26:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:29,884 INFO L225 Difference]: With dead ends: 140 [2021-08-27 04:26:29,884 INFO L226 Difference]: Without dead ends: 140 [2021-08-27 04:26:29,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:26:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-27 04:26:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-08-27 04:26:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 135 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-08-27 04:26:29,887 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 28 [2021-08-27 04:26:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:29,888 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-08-27 04:26:29,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-08-27 04:26:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 04:26:29,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:29,890 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:29,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:26:29,891 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:29,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1099482673, now seen corresponding path program 1 times [2021-08-27 04:26:29,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:29,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178232790] [2021-08-27 04:26:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:29,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:29,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:29,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:29,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178232790] [2021-08-27 04:26:29,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178232790] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:29,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:29,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:29,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789911914] [2021-08-27 04:26:29,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:26:29,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:26:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:29,982 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:30,164 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-08-27 04:26:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:26:30,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-08-27 04:26:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:30,166 INFO L225 Difference]: With dead ends: 137 [2021-08-27 04:26:30,166 INFO L226 Difference]: Without dead ends: 137 [2021-08-27 04:26:30,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:26:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-27 04:26:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2021-08-27 04:26:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 103 states have (on average 1.3300970873786409) internal successors, (137), 126 states have internal predecessors, (137), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2021-08-27 04:26:30,170 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 28 [2021-08-27 04:26:30,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:30,171 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2021-08-27 04:26:30,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2021-08-27 04:26:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 04:26:30,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:30,172 INFO L512 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, 1] [2021-08-27 04:26:30,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:26:30,172 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:30,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:30,173 INFO L82 PathProgramCache]: Analyzing trace with hash 433521793, now seen corresponding path program 1 times [2021-08-27 04:26:30,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:30,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611092099] [2021-08-27 04:26:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:30,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:30,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:30,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:30,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611092099] [2021-08-27 04:26:30,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611092099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:30,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750083127] [2021-08-27 04:26:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:30,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:30,529 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) [2021-08-27 04:26:30,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:26:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-27 04:26:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:30,734 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 [2021-08-27 04:26:30,755 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 [2021-08-27 04:26:30,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:30,832 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 [2021-08-27 04:26:30,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:26:30,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:30,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-08-27 04:26:30,924 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 11 [2021-08-27 04:26:30,976 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 25 treesize of output 13 [2021-08-27 04:26:31,014 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-27 04:26:31,014 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 27 treesize of output 26 [2021-08-27 04:26:31,184 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 04:26:31,185 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 32 treesize of output 14 [2021-08-27 04:26:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:31,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750083127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:31,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:31,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 26 [2021-08-27 04:26:31,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170139083] [2021-08-27 04:26:31,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 04:26:31,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:31,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 04:26:31,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:26:31,193 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:32,483 INFO L93 Difference]: Finished difference Result 224 states and 240 transitions. [2021-08-27 04:26:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:26:32,484 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-08-27 04:26:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:32,484 INFO L225 Difference]: With dead ends: 224 [2021-08-27 04:26:32,484 INFO L226 Difference]: Without dead ends: 224 [2021-08-27 04:26:32,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=369, Invalid=1353, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:26:32,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-27 04:26:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 145. [2021-08-27 04:26:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 118 states have (on average 1.305084745762712) internal successors, (154), 141 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-08-27 04:26:32,492 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 30 [2021-08-27 04:26:32,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:32,493 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-08-27 04:26:32,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-08-27 04:26:32,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 04:26:32,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:32,493 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:32,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:32,708 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,SelfDestructingSolverStorable14 [2021-08-27 04:26:32,709 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr45ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1406132026, now seen corresponding path program 1 times [2021-08-27 04:26:32,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:32,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757568639] [2021-08-27 04:26:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:32,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:32,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:26:32,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:32,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757568639] [2021-08-27 04:26:32,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757568639] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:32,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:32,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:26:32,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734793372] [2021-08-27 04:26:32,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:32,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:32,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:32,750 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:32,851 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2021-08-27 04:26:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:32,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-08-27 04:26:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:32,852 INFO L225 Difference]: With dead ends: 146 [2021-08-27 04:26:32,852 INFO L226 Difference]: Without dead ends: 146 [2021-08-27 04:26:32,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-27 04:26:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-08-27 04:26:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 119 states have (on average 1.2941176470588236) internal successors, (154), 142 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2021-08-27 04:26:32,855 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 33 [2021-08-27 04:26:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:32,856 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2021-08-27 04:26:32,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2021-08-27 04:26:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:26:32,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:32,857 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:32,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:26:32,857 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1621828745, now seen corresponding path program 1 times [2021-08-27 04:26:32,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:32,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205394491] [2021-08-27 04:26:32,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:32,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:32,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:32,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:32,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205394491] [2021-08-27 04:26:32,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205394491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:32,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193677329] [2021-08-27 04:26:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:32,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:32,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:32,942 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) [2021-08-27 04:26:32,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:26:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:33,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 04:26:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:33,154 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 [2021-08-27 04:26:33,204 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 [2021-08-27 04:26:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:26:33,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193677329] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:33,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:26:33,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2021-08-27 04:26:33,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208329169] [2021-08-27 04:26:33,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:33,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:33,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:33,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:26:33,235 INFO L87 Difference]: Start difference. First operand 146 states and 157 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:33,302 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2021-08-27 04:26:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:33,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-08-27 04:26:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:33,303 INFO L225 Difference]: With dead ends: 154 [2021-08-27 04:26:33,303 INFO L226 Difference]: Without dead ends: 154 [2021-08-27 04:26:33,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:26:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-27 04:26:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2021-08-27 04:26:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.2868852459016393) internal successors, (157), 145 states have internal predecessors, (157), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2021-08-27 04:26:33,315 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 35 [2021-08-27 04:26:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:33,315 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2021-08-27 04:26:33,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2021-08-27 04:26:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 04:26:33,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:33,316 INFO L512 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:33,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:33,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:33,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:33,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1420252007, now seen corresponding path program 1 times [2021-08-27 04:26:33,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:33,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038925106] [2021-08-27 04:26:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:33,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:33,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:33,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:33,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038925106] [2021-08-27 04:26:33,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038925106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:33,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205445344] [2021-08-27 04:26:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:33,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:33,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:33,651 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) [2021-08-27 04:26:33,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:26:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 04:26:33,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:33,874 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 [2021-08-27 04:26:33,880 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 [2021-08-27 04:26:33,903 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-27 04:26:33,903 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 27 treesize of output 11 [2021-08-27 04:26:33,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:33,910 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 27 treesize of output 11 [2021-08-27 04:26:34,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-27 04:26:34,020 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 18 treesize of output 10 [2021-08-27 04:26:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:26:34,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205445344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:34,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:34,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 10 [2021-08-27 04:26:34,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960371877] [2021-08-27 04:26:34,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:26:34,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:26:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:26:34,049 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:34,488 INFO L93 Difference]: Finished difference Result 203 states and 217 transitions. [2021-08-27 04:26:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:26:34,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-08-27 04:26:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:34,489 INFO L225 Difference]: With dead ends: 203 [2021-08-27 04:26:34,489 INFO L226 Difference]: Without dead ends: 203 [2021-08-27 04:26:34,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:26:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-27 04:26:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 160. [2021-08-27 04:26:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 133 states have (on average 1.2781954887218046) internal successors, (170), 156 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-08-27 04:26:34,492 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 36 [2021-08-27 04:26:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:34,492 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-08-27 04:26:34,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-08-27 04:26:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:26:34,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:34,493 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:34,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:34,710 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,SelfDestructingSolverStorable17 [2021-08-27 04:26:34,710 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1928074548, now seen corresponding path program 1 times [2021-08-27 04:26:34,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:34,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112354259] [2021-08-27 04:26:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:34,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:34,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:34,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:34,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112354259] [2021-08-27 04:26:34,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112354259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:34,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784769351] [2021-08-27 04:26:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:34,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:34,855 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) [2021-08-27 04:26:34,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:26:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-27 04:26:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:35,050 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 [2021-08-27 04:26:35,137 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:26:35,138 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 [2021-08-27 04:26:35,184 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 21 treesize of output 17 [2021-08-27 04:26:35,308 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:35,309 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 36 treesize of output 27 [2021-08-27 04:26:35,374 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-27 04:26:35,375 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 49 treesize of output 35 [2021-08-27 04:26:35,588 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 30 treesize of output 18 [2021-08-27 04:26:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:35,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784769351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:35,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:35,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-08-27 04:26:35,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142845216] [2021-08-27 04:26:35,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 04:26:35,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:35,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 04:26:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:26:35,662 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:36,340 INFO L93 Difference]: Finished difference Result 251 states and 271 transitions. [2021-08-27 04:26:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:26:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-27 04:26:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:36,342 INFO L225 Difference]: With dead ends: 251 [2021-08-27 04:26:36,342 INFO L226 Difference]: Without dead ends: 251 [2021-08-27 04:26:36,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:26:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-27 04:26:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 168. [2021-08-27 04:26:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 141 states have (on average 1.2765957446808511) internal successors, (180), 164 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2021-08-27 04:26:36,345 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 37 [2021-08-27 04:26:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:36,345 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2021-08-27 04:26:36,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2021-08-27 04:26:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:26:36,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:36,346 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:36,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:36,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:36,561 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:36,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1928074547, now seen corresponding path program 1 times [2021-08-27 04:26:36,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:36,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061953546] [2021-08-27 04:26:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:36,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:36,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:36,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:36,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061953546] [2021-08-27 04:26:36,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061953546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:36,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914661539] [2021-08-27 04:26:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:36,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:36,761 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) [2021-08-27 04:26:36,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:26:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:36,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-27 04:26:36,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:36,999 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 [2021-08-27 04:26:37,103 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:37,103 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 [2021-08-27 04:26:37,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:26:37,149 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 21 treesize of output 17 [2021-08-27 04:26:37,157 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 [2021-08-27 04:26:37,300 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:37,301 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 19 treesize of output 18 [2021-08-27 04:26:37,314 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:37,314 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 36 treesize of output 27 [2021-08-27 04:26:37,396 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-27 04:26:37,397 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 98 treesize of output 68 [2021-08-27 04:26:37,410 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-08-27 04:26:37,413 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 42 [2021-08-27 04:26:37,683 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 50 treesize of output 34 [2021-08-27 04:26:37,686 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:26:37,686 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 31 treesize of output 19 [2021-08-27 04:26:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:37,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914661539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:37,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:37,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-27 04:26:37,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57455096] [2021-08-27 04:26:37,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 04:26:37,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 04:26:37,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:26:37,700 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:38,671 INFO L93 Difference]: Finished difference Result 234 states and 253 transitions. [2021-08-27 04:26:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:26:38,677 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-27 04:26:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:38,678 INFO L225 Difference]: With dead ends: 234 [2021-08-27 04:26:38,678 INFO L226 Difference]: Without dead ends: 234 [2021-08-27 04:26:38,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 04:26:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-27 04:26:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 171. [2021-08-27 04:26:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 144 states have (on average 1.2708333333333333) internal successors, (183), 167 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2021-08-27 04:26:38,681 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 37 [2021-08-27 04:26:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:38,681 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2021-08-27 04:26:38,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2021-08-27 04:26:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:26:38,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:38,682 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:38,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:38,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:38,888 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash -537111029, now seen corresponding path program 1 times [2021-08-27 04:26:38,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:38,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789363412] [2021-08-27 04:26:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:38,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:39,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:39,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:39,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789363412] [2021-08-27 04:26:39,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789363412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:39,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910426904] [2021-08-27 04:26:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:39,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:39,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:39,300 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) [2021-08-27 04:26:39,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:26:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:39,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 04:26:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:39,585 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 [2021-08-27 04:26:39,604 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 [2021-08-27 04:26:39,678 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:39,678 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 [2021-08-27 04:26:39,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:39,716 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 25 treesize of output 13 [2021-08-27 04:26:39,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:26:39,764 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 11 [2021-08-27 04:26:39,817 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 25 treesize of output 13 [2021-08-27 04:26:39,842 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 [2021-08-27 04:26:39,881 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:39,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 04:26:39,911 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 16 treesize of output 12 [2021-08-27 04:26:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:39,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-08-27 04:26:39,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-27 04:26:40,071 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-08-27 04:26:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2021-08-27 04:26:40,120 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-27 04:26:40,120 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 27 treesize of output 26 [2021-08-27 04:26:40,253 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 04:26:40,253 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 32 treesize of output 14 [2021-08-27 04:26:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:40,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910426904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:40,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:40,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-08-27 04:26:40,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766203398] [2021-08-27 04:26:40,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 04:26:40,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:40,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 04:26:40,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:26:40,259 INFO L87 Difference]: Start difference. First operand 171 states and 186 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:41,516 INFO L93 Difference]: Finished difference Result 250 states and 271 transitions. [2021-08-27 04:26:41,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 04:26:41,516 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-27 04:26:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:41,517 INFO L225 Difference]: With dead ends: 250 [2021-08-27 04:26:41,517 INFO L226 Difference]: Without dead ends: 250 [2021-08-27 04:26:41,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 905.9ms TimeCoverageRelationStatistics Valid=553, Invalid=2527, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 04:26:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-27 04:26:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 186. [2021-08-27 04:26:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 159 states have (on average 1.251572327044025) internal successors, (199), 182 states have internal predecessors, (199), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:41,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 202 transitions. [2021-08-27 04:26:41,520 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 202 transitions. Word has length 37 [2021-08-27 04:26:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:41,520 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 202 transitions. [2021-08-27 04:26:41,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:41,521 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 202 transitions. [2021-08-27 04:26:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:26:41,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:41,521 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:41,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:41,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:41,733 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr58ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:41,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138870, now seen corresponding path program 1 times [2021-08-27 04:26:41,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:41,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060179941] [2021-08-27 04:26:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:41,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:26:41,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:41,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060179941] [2021-08-27 04:26:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060179941] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:41,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:41,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:26:41,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85153771] [2021-08-27 04:26:41,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:41,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:41,765 INFO L87 Difference]: Start difference. First operand 186 states and 202 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:41,850 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2021-08-27 04:26:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:41,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-27 04:26:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:41,851 INFO L225 Difference]: With dead ends: 185 [2021-08-27 04:26:41,851 INFO L226 Difference]: Without dead ends: 185 [2021-08-27 04:26:41,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-08-27 04:26:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-08-27 04:26:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 181 states have internal predecessors, (197), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2021-08-27 04:26:41,855 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 37 [2021-08-27 04:26:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:41,855 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2021-08-27 04:26:41,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2021-08-27 04:26:41,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 04:26:41,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:41,856 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:41,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-27 04:26:41,856 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr60ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1004344249, now seen corresponding path program 1 times [2021-08-27 04:26:41,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:41,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391911791] [2021-08-27 04:26:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:41,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:41,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:26:41,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:41,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391911791] [2021-08-27 04:26:41,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391911791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:41,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565049549] [2021-08-27 04:26:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:41,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:41,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:41,976 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) [2021-08-27 04:26:41,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:26:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:42,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 04:26:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:26:42,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565049549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:42,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:42,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-27 04:26:42,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810100755] [2021-08-27 04:26:42,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 04:26:42,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 04:26:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:26:42,660 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:42,967 INFO L93 Difference]: Finished difference Result 195 states and 209 transitions. [2021-08-27 04:26:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:26:42,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-08-27 04:26:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:42,968 INFO L225 Difference]: With dead ends: 195 [2021-08-27 04:26:42,968 INFO L226 Difference]: Without dead ends: 170 [2021-08-27 04:26:42,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:26:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-27 04:26:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-08-27 04:26:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 144 states have (on average 1.2569444444444444) internal successors, (181), 166 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2021-08-27 04:26:42,970 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 39 [2021-08-27 04:26:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:42,971 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2021-08-27 04:26:42,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:42,971 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2021-08-27 04:26:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 04:26:42,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:42,971 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:43,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-27 04:26:43,189 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,SelfDestructingSolverStorable22 [2021-08-27 04:26:43,189 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:43,190 INFO L82 PathProgramCache]: Analyzing trace with hash -497838896, now seen corresponding path program 2 times [2021-08-27 04:26:43,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:43,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839150410] [2021-08-27 04:26:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:43,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:43,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:43,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:43,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839150410] [2021-08-27 04:26:43,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839150410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:43,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491539826] [2021-08-27 04:26:43,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:26:43,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:43,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:43,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:26:43,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:26:43,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:26:43,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:26:43,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 04:26:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:43,971 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 [2021-08-27 04:26:43,985 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 [2021-08-27 04:26:44,069 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:44,070 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 [2021-08-27 04:26:44,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:26:44,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:44,113 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 25 treesize of output 13 [2021-08-27 04:26:44,153 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 11 [2021-08-27 04:26:44,203 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 25 treesize of output 13 [2021-08-27 04:26:44,240 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 [2021-08-27 04:26:44,285 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:44,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 04:26:44,319 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 16 treesize of output 12 [2021-08-27 04:26:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-08-27 04:26:44,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-27 04:26:44,474 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-08-27 04:26:44,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2021-08-27 04:26:44,520 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-27 04:26:44,521 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 27 treesize of output 26 [2021-08-27 04:26:44,642 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 04:26:44,642 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 32 treesize of output 14 [2021-08-27 04:26:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:44,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491539826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:44,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:44,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2021-08-27 04:26:44,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720563730] [2021-08-27 04:26:44,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 04:26:44,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 04:26:44,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:26:44,649 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:45,798 INFO L93 Difference]: Finished difference Result 246 states and 267 transitions. [2021-08-27 04:26:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 04:26:45,798 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-08-27 04:26:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:45,799 INFO L225 Difference]: With dead ends: 246 [2021-08-27 04:26:45,799 INFO L226 Difference]: Without dead ends: 246 [2021-08-27 04:26:45,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 854.2ms TimeCoverageRelationStatistics Valid=529, Invalid=2227, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:26:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-27 04:26:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 180. [2021-08-27 04:26:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 154 states have (on average 1.2532467532467533) internal successors, (193), 176 states have internal predecessors, (193), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 196 transitions. [2021-08-27 04:26:45,802 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 196 transitions. Word has length 40 [2021-08-27 04:26:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:45,802 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 196 transitions. [2021-08-27 04:26:45,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 196 transitions. [2021-08-27 04:26:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-27 04:26:45,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:45,803 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:45,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:46,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-27 04:26:46,017 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:46,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1451131193, now seen corresponding path program 1 times [2021-08-27 04:26:46,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:46,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419665766] [2021-08-27 04:26:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:46,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:46,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:46,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:46,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419665766] [2021-08-27 04:26:46,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419665766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:46,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651055030] [2021-08-27 04:26:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:46,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:46,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:46,367 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:26:46,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:26:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 04:26:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:46,761 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 [2021-08-27 04:26:46,850 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:46,851 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 [2021-08-27 04:26:46,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:26:46,906 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 21 treesize of output 17 [2021-08-27 04:26:46,916 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 [2021-08-27 04:26:47,068 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:47,068 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 19 treesize of output 18 [2021-08-27 04:26:47,083 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:47,083 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 36 treesize of output 27 [2021-08-27 04:26:47,177 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-27 04:26:47,178 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 133 treesize of output 91 [2021-08-27 04:26:47,180 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 102 treesize of output 94 [2021-08-27 04:26:47,195 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-08-27 04:26:47,195 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 69 [2021-08-27 04:26:47,197 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 63 treesize of output 51 [2021-08-27 04:26:47,529 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 60 treesize of output 44 [2021-08-27 04:26:47,533 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:26:47,533 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 41 treesize of output 29 [2021-08-27 04:26:47,621 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 04:26:47,622 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 25 treesize of output 16 [2021-08-27 04:26:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:47,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651055030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:47,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:47,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2021-08-27 04:26:47,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301974516] [2021-08-27 04:26:47,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:26:47,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:26:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:26:47,660 INFO L87 Difference]: Start difference. First operand 180 states and 196 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:49,336 INFO L93 Difference]: Finished difference Result 234 states and 253 transitions. [2021-08-27 04:26:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 04:26:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-08-27 04:26:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:49,337 INFO L225 Difference]: With dead ends: 234 [2021-08-27 04:26:49,337 INFO L226 Difference]: Without dead ends: 234 [2021-08-27 04:26:49,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1215.3ms TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 04:26:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-27 04:26:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 179. [2021-08-27 04:26:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 153 states have (on average 1.2483660130718954) internal successors, (191), 175 states have internal predecessors, (191), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2021-08-27 04:26:49,340 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 42 [2021-08-27 04:26:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:49,340 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2021-08-27 04:26:49,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2021-08-27 04:26:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-27 04:26:49,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:49,341 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:49,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:49,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-27 04:26:49,559 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:49,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:49,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1493149446, now seen corresponding path program 2 times [2021-08-27 04:26:49,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:49,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023760466] [2021-08-27 04:26:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:49,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:49,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:49,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:49,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023760466] [2021-08-27 04:26:49,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023760466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:49,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713644402] [2021-08-27 04:26:49,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:26:49,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:49,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:49,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:26:49,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:26:50,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:26:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:26:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-27 04:26:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:50,201 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 [2021-08-27 04:26:50,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:50,301 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 [2021-08-27 04:26:50,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:26:50,354 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 [2021-08-27 04:26:50,514 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:50,514 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 26 treesize of output 21 [2021-08-27 04:26:50,526 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 04:26:50,527 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 27 treesize of output 22 [2021-08-27 04:26:50,628 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:26:50,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 65 [2021-08-27 04:26:50,632 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:26:50,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 44 [2021-08-27 04:26:51,044 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-27 04:26:51,045 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 68 treesize of output 42 [2021-08-27 04:26:51,054 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-27 04:26:51,054 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 33 treesize of output 23 [2021-08-27 04:26:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:51,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713644402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:51,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:51,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-27 04:26:51,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676325922] [2021-08-27 04:26:51,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:26:51,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:51,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:26:51,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:26:51,111 INFO L87 Difference]: Start difference. First operand 179 states and 194 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:52,041 INFO L93 Difference]: Finished difference Result 212 states and 229 transitions. [2021-08-27 04:26:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:26:52,041 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-08-27 04:26:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:52,042 INFO L225 Difference]: With dead ends: 212 [2021-08-27 04:26:52,042 INFO L226 Difference]: Without dead ends: 212 [2021-08-27 04:26:52,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 756.7ms TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 04:26:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-27 04:26:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 181. [2021-08-27 04:26:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 155 states have (on average 1.2451612903225806) internal successors, (193), 177 states have internal predecessors, (193), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 196 transitions. [2021-08-27 04:26:52,045 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 196 transitions. Word has length 42 [2021-08-27 04:26:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:52,045 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 196 transitions. [2021-08-27 04:26:52,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 196 transitions. [2021-08-27 04:26:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 04:26:52,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:52,046 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:52,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:52,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-27 04:26:52,264 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1042044414, now seen corresponding path program 1 times [2021-08-27 04:26:52,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:52,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751937528] [2021-08-27 04:26:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:52,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:52,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:52,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:52,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751937528] [2021-08-27 04:26:52,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751937528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:52,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555408849] [2021-08-27 04:26:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:52,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:52,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:52,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:26:52,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:26:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:52,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-27 04:26:52,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:53,016 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 [2021-08-27 04:26:53,084 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:53,084 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 [2021-08-27 04:26:53,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:26:53,233 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:53,233 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 27 treesize of output 22 [2021-08-27 04:26:53,315 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-27 04:26:53,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:26:53,335 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:26:53,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-08-27 04:26:53,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-08-27 04:26:53,509 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-08-27 04:26:53,510 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 52 treesize of output 49 [2021-08-27 04:26:53,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 04:26:53,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:26:53,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-08-27 04:26:53,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146210456] [2021-08-27 04:26:53,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-27 04:26:53,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:53,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 04:26:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:26:53,559 INFO L87 Difference]: Start difference. First operand 181 states and 196 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:54,248 INFO L93 Difference]: Finished difference Result 250 states and 270 transitions. [2021-08-27 04:26:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 04:26:54,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-08-27 04:26:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:54,249 INFO L225 Difference]: With dead ends: 250 [2021-08-27 04:26:54,249 INFO L226 Difference]: Without dead ends: 250 [2021-08-27 04:26:54,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 642.2ms TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 04:26:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-27 04:26:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 194. [2021-08-27 04:26:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 168 states have (on average 1.2380952380952381) internal successors, (208), 190 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 211 transitions. [2021-08-27 04:26:54,262 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 211 transitions. Word has length 44 [2021-08-27 04:26:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:54,262 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 211 transitions. [2021-08-27 04:26:54,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 211 transitions. [2021-08-27 04:26:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 04:26:54,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:54,262 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:54,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:54,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 04:26:54,469 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1042044413, now seen corresponding path program 1 times [2021-08-27 04:26:54,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:54,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989074592] [2021-08-27 04:26:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:54,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:54,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:54,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:54,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989074592] [2021-08-27 04:26:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989074592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:54,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20796736] [2021-08-27 04:26:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:54,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:26:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:54,793 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:26:54,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:26:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-27 04:26:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:26:55,388 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 [2021-08-27 04:26:55,486 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:26:55,487 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 [2021-08-27 04:26:55,532 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 21 treesize of output 17 [2021-08-27 04:26:55,541 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 [2021-08-27 04:26:55,706 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:55,706 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 36 treesize of output 27 [2021-08-27 04:26:55,715 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 [2021-08-27 04:26:55,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:55,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:26:55,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:26:55,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:26:55,935 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 04:26:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 04:26:55,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-08-27 04:26:56,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-27 04:26:56,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-08-27 04:26:56,262 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:26:56,262 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 19 treesize of output 18 [2021-08-27 04:26:56,282 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-08-27 04:26:56,282 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 86 treesize of output 55 [2021-08-27 04:26:56,364 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-27 04:26:56,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 96 [2021-08-27 04:26:56,381 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-08-27 04:26:56,382 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 92 [2021-08-27 04:26:56,861 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:26:56,861 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 100 treesize of output 55 [2021-08-27 04:26:56,866 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:26:56,866 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 44 treesize of output 32 [2021-08-27 04:26:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:56,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20796736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:26:56,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:26:56,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-08-27 04:26:56,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170612807] [2021-08-27 04:26:56,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:26:56,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:26:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:26:56,952 INFO L87 Difference]: Start difference. First operand 194 states and 211 transitions. Second operand has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:59,749 INFO L93 Difference]: Finished difference Result 285 states and 308 transitions. [2021-08-27 04:26:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 04:26:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-08-27 04:26:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:59,750 INFO L225 Difference]: With dead ends: 285 [2021-08-27 04:26:59,750 INFO L226 Difference]: Without dead ends: 285 [2021-08-27 04:26:59,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1995.8ms TimeCoverageRelationStatistics Valid=542, Invalid=3364, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 04:26:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-08-27 04:26:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 197. [2021-08-27 04:26:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 171 states have (on average 1.2339181286549707) internal successors, (211), 193 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2021-08-27 04:26:59,754 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 44 [2021-08-27 04:26:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:59,754 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2021-08-27 04:26:59,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 34 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:26:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2021-08-27 04:26:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:26:59,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:59,755 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:59,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 04:26:59,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 04:26:59,981 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:26:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:59,981 INFO L82 PathProgramCache]: Analyzing trace with hash -967348838, now seen corresponding path program 1 times [2021-08-27 04:26:59,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:59,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78444997] [2021-08-27 04:26:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:59,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:00,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:27:00,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:00,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78444997] [2021-08-27 04:27:00,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78444997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:00,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560483045] [2021-08-27 04:27:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:00,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:00,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:00,221 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:00,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 04:27:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:27:00,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:00,910 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 [2021-08-27 04:27:01,017 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:27:01,017 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 [2021-08-27 04:27:01,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:27:01,207 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:27:01,207 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 36 treesize of output 27 [2021-08-27 04:27:01,317 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-27 04:27:01,317 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 60 treesize of output 45 [2021-08-27 04:27:01,870 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:27:01,870 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 40 treesize of output 19 [2021-08-27 04:27:01,947 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-08-27 04:27:01,947 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 21 treesize of output 21 [2021-08-27 04:27:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:01,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560483045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:01,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:01,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 29 [2021-08-27 04:27:01,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345060389] [2021-08-27 04:27:01,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:27:01,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:27:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:27:01,971 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:03,730 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2021-08-27 04:27:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-27 04:27:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-08-27 04:27:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:03,731 INFO L225 Difference]: With dead ends: 268 [2021-08-27 04:27:03,731 INFO L226 Difference]: Without dead ends: 268 [2021-08-27 04:27:03,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1544.6ms TimeCoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2021-08-27 04:27:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-27 04:27:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 206. [2021-08-27 04:27:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 180 states have (on average 1.2333333333333334) internal successors, (222), 202 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 225 transitions. [2021-08-27 04:27:03,734 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 225 transitions. Word has length 45 [2021-08-27 04:27:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:03,735 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 225 transitions. [2021-08-27 04:27:03,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 225 transitions. [2021-08-27 04:27:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:27:03,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:03,735 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:03,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:03,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:03,935 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:27:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash -967348837, now seen corresponding path program 1 times [2021-08-27 04:27:03,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:03,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568576111] [2021-08-27 04:27:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:03,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:04,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:04,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568576111] [2021-08-27 04:27:04,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568576111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:04,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562926929] [2021-08-27 04:27:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:04,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:04,204 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:04,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:27:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:04,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-27 04:27:04,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:04,855 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 [2021-08-27 04:27:04,882 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:27:04,882 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 [2021-08-27 04:27:04,967 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-27 04:27:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 04:27:04,996 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 20 treesize of output 16 [2021-08-27 04:27:05,101 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:27:05,101 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 35 treesize of output 26 [2021-08-27 04:27:05,173 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-27 04:27:05,173 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 59 treesize of output 44 [2021-08-27 04:27:05,365 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:27:05,365 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 35 treesize of output 18 [2021-08-27 04:27:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:05,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562926929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:05,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:05,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-08-27 04:27:05,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96033889] [2021-08-27 04:27:05,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:27:05,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:27:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:27:05,430 INFO L87 Difference]: Start difference. First operand 206 states and 225 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:06,653 INFO L93 Difference]: Finished difference Result 225 states and 243 transitions. [2021-08-27 04:27:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:27:06,653 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-08-27 04:27:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:06,654 INFO L225 Difference]: With dead ends: 225 [2021-08-27 04:27:06,654 INFO L226 Difference]: Without dead ends: 225 [2021-08-27 04:27:06,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 826.0ms TimeCoverageRelationStatistics Valid=339, Invalid=1823, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 04:27:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-27 04:27:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2021-08-27 04:27:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 180 states have (on average 1.2277777777777779) internal successors, (221), 202 states have internal predecessors, (221), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 224 transitions. [2021-08-27 04:27:06,657 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 224 transitions. Word has length 45 [2021-08-27 04:27:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:06,657 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 224 transitions. [2021-08-27 04:27:06,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 224 transitions. [2021-08-27 04:27:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 04:27:06,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:06,657 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:06,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:06,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:06,882 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:27:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash 953299869, now seen corresponding path program 3 times [2021-08-27 04:27:06,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:06,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150831080] [2021-08-27 04:27:06,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:06,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:07,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:07,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:07,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150831080] [2021-08-27 04:27:07,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150831080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:07,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44985595] [2021-08-27 04:27:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:27:07,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:07,112 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:07,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:27:07,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:27:07,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:27:07,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-27 04:27:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:07,961 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 [2021-08-27 04:27:07,973 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 [2021-08-27 04:27:08,086 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:27:08,086 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 26 treesize of output 21 [2021-08-27 04:27:08,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 04:27:08,102 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-27 04:27:08,102 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 19 treesize of output 22 [2021-08-27 04:27:08,209 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-27 04:27:08,209 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 24 [2021-08-27 04:27:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:08,220 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:27:08,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-08-27 04:27:08,295 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 [2021-08-27 04:27:08,364 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 04:27:08,364 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-08-27 04:27:08,388 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-08-27 04:27:08,389 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 42 [2021-08-27 04:27:08,673 INFO L354 Elim1Store]: treesize reduction 79, result has 30.1 percent of original size [2021-08-27 04:27:08,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 112 [2021-08-27 04:27:08,702 INFO L354 Elim1Store]: treesize reduction 83, result has 26.5 percent of original size [2021-08-27 04:27:08,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 115 [2021-08-27 04:27:09,060 INFO L354 Elim1Store]: treesize reduction 146, result has 15.1 percent of original size [2021-08-27 04:27:09,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 119 [2021-08-27 04:27:09,093 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-08-27 04:27:09,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 87 [2021-08-27 04:27:09,693 INFO L354 Elim1Store]: treesize reduction 90, result has 25.6 percent of original size [2021-08-27 04:27:09,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 112 [2021-08-27 04:27:09,717 INFO L354 Elim1Store]: treesize reduction 37, result has 35.1 percent of original size [2021-08-27 04:27:09,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 97 treesize of output 95 [2021-08-27 04:27:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:10,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44985595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:10,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:10,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-08-27 04:27:10,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527043708] [2021-08-27 04:27:10,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-27 04:27:10,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-27 04:27:10,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 04:27:10,146 INFO L87 Difference]: Start difference. First operand 206 states and 224 transitions. Second operand has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:12,479 INFO L93 Difference]: Finished difference Result 299 states and 325 transitions. [2021-08-27 04:27:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-27 04:27:12,479 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-08-27 04:27:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:12,480 INFO L225 Difference]: With dead ends: 299 [2021-08-27 04:27:12,480 INFO L226 Difference]: Without dead ends: 299 [2021-08-27 04:27:12,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2049.4ms TimeCoverageRelationStatistics Valid=685, Invalid=3475, Unknown=0, NotChecked=0, Total=4160 [2021-08-27 04:27:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-08-27 04:27:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 229. [2021-08-27 04:27:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 203 states have (on average 1.2216748768472907) internal successors, (248), 225 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 251 transitions. [2021-08-27 04:27:12,484 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 251 transitions. Word has length 47 [2021-08-27 04:27:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:12,484 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 251 transitions. [2021-08-27 04:27:12,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 33 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 251 transitions. [2021-08-27 04:27:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 04:27:12,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:12,485 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:12,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:12,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:12,707 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:27:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:12,707 INFO L82 PathProgramCache]: Analyzing trace with hash 953299870, now seen corresponding path program 2 times [2021-08-27 04:27:12,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:12,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109404942] [2021-08-27 04:27:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:12,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:13,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:13,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:13,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109404942] [2021-08-27 04:27:13,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109404942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:13,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724280081] [2021-08-27 04:27:13,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:27:13,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:13,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:13,007 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:13,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 04:27:13,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:27:13,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:27:13,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-27 04:27:13,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:13,849 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 [2021-08-27 04:27:13,931 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:27:13,932 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 [2021-08-27 04:27:13,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:27:13,984 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 26 treesize of output 22 [2021-08-27 04:27:13,990 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 [2021-08-27 04:27:14,140 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-27 04:27:14,140 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 19 treesize of output 26 [2021-08-27 04:27:14,154 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:27:14,154 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 45 treesize of output 32 [2021-08-27 04:27:14,294 INFO L354 Elim1Store]: treesize reduction 62, result has 28.7 percent of original size [2021-08-27 04:27:14,294 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 31 [2021-08-27 04:27:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:14,310 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-08-27 04:27:14,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 35 [2021-08-27 04:27:14,387 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-08-27 04:27:14,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-08-27 04:27:14,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 04:27:14,486 INFO L354 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2021-08-27 04:27:14,487 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 41 [2021-08-27 04:27:14,508 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 04:27:14,508 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 43 [2021-08-27 04:27:14,733 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-08-27 04:27:14,734 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 81 treesize of output 50 [2021-08-27 04:27:14,745 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 19 treesize of output 18 [2021-08-27 04:27:14,845 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-27 04:27:14,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 84 [2021-08-27 04:27:14,854 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-08-27 04:27:14,854 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 109 treesize of output 69 [2021-08-27 04:27:15,162 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:27:15,163 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 80 treesize of output 43 [2021-08-27 04:27:15,165 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 37 treesize of output 29 [2021-08-27 04:27:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:15,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724280081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:15,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:15,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-08-27 04:27:15,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196759218] [2021-08-27 04:27:15,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 04:27:15,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 04:27:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:27:15,253 INFO L87 Difference]: Start difference. First operand 229 states and 251 transitions. Second operand has 33 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:16,911 INFO L93 Difference]: Finished difference Result 312 states and 339 transitions. [2021-08-27 04:27:16,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 04:27:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-08-27 04:27:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:16,912 INFO L225 Difference]: With dead ends: 312 [2021-08-27 04:27:16,912 INFO L226 Difference]: Without dead ends: 312 [2021-08-27 04:27:16,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1081.8ms TimeCoverageRelationStatistics Valid=364, Invalid=2186, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 04:27:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-27 04:27:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 216. [2021-08-27 04:27:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 190 states have (on average 1.2263157894736842) internal successors, (233), 212 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 236 transitions. [2021-08-27 04:27:16,916 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 236 transitions. Word has length 47 [2021-08-27 04:27:16,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:16,916 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 236 transitions. [2021-08-27 04:27:16,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 236 transitions. [2021-08-27 04:27:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 04:27:16,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:16,916 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:16,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:17,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:17,125 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:27:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1950703908, now seen corresponding path program 1 times [2021-08-27 04:27:17,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:17,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011286759] [2021-08-27 04:27:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:17,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:17,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 04:27:17,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:17,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011286759] [2021-08-27 04:27:17,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011286759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:17,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004148948] [2021-08-27 04:27:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:17,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:17,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:17,627 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:17,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 04:27:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:18,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 04:27:18,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:18,502 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 [2021-08-27 04:27:18,516 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 [2021-08-27 04:27:18,591 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:27:18,591 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 [2021-08-27 04:27:18,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:27:18,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:18,623 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 25 treesize of output 13 [2021-08-27 04:27:18,665 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 11 [2021-08-27 04:27:18,718 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 25 treesize of output 13 [2021-08-27 04:27:18,743 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 [2021-08-27 04:27:18,790 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:27:18,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2021-08-27 04:27:18,834 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-27 04:27:18,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-08-27 04:27:18,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:27:18,890 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 38 treesize of output 26 [2021-08-27 04:27:18,986 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-08-27 04:27:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 39 [2021-08-27 04:27:19,052 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 [2021-08-27 04:27:19,099 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 04:27:19,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 04:27:19,141 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-27 04:27:19,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-08-27 04:27:19,148 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 20 treesize of output 16 [2021-08-27 04:27:19,195 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 37 treesize of output 25 [2021-08-27 04:27:19,286 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-08-27 04:27:19,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-08-27 04:27:19,342 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-27 04:27:19,342 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-08-27 04:27:19,631 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-27 04:27:19,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-08-27 04:27:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:19,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004148948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:19,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:19,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-08-27 04:27:19,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902129048] [2021-08-27 04:27:19,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 04:27:19,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 04:27:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 04:27:19,636 INFO L87 Difference]: Start difference. First operand 216 states and 236 transitions. Second operand has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:39,940 INFO L93 Difference]: Finished difference Result 307 states and 336 transitions. [2021-08-27 04:27:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-27 04:27:39,941 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-08-27 04:27:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:39,941 INFO L225 Difference]: With dead ends: 307 [2021-08-27 04:27:39,941 INFO L226 Difference]: Without dead ends: 307 [2021-08-27 04:27:39,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 3743.2ms TimeCoverageRelationStatistics Valid=914, Invalid=4635, Unknown=1, NotChecked=0, Total=5550 [2021-08-27 04:27:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-27 04:27:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 197. [2021-08-27 04:27:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 193 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2021-08-27 04:27:39,945 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 47 [2021-08-27 04:27:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:39,945 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2021-08-27 04:27:39,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2021-08-27 04:27:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 04:27:39,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:39,946 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:39,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:40,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:40,161 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:27:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:40,161 INFO L82 PathProgramCache]: Analyzing trace with hash 349426627, now seen corresponding path program 1 times [2021-08-27 04:27:40,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:40,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121410518] [2021-08-27 04:27:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:40,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:40,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:40,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:40,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121410518] [2021-08-27 04:27:40,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121410518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:40,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146799199] [2021-08-27 04:27:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:40,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:40,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:40,941 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:40,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 04:27:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-27 04:27:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:41,858 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 [2021-08-27 04:27:41,879 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:27:41,879 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 [2021-08-27 04:27:42,012 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-08-27 04:27:42,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 04:27:42,072 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 [2021-08-27 04:27:42,076 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 25 treesize of output 21 [2021-08-27 04:27:42,311 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:27:42,311 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 26 treesize of output 21 [2021-08-27 04:27:42,328 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 04:27:42,328 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 44 treesize of output 31 [2021-08-27 04:27:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:42,457 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:27:42,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:27:42,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:42,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:42,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:27:42,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:42,507 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-27 04:27:42,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2021-08-27 04:27:42,591 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:27:42,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 33 [2021-08-27 04:27:42,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-27 04:27:42,802 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 04:27:42,803 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 71 treesize of output 44 [2021-08-27 04:27:42,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-08-27 04:27:42,890 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-08-27 04:27:42,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 95 [2021-08-27 04:27:42,905 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-08-27 04:27:42,905 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 92 [2021-08-27 04:27:43,373 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 [2021-08-27 04:27:43,484 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-27 04:27:43,484 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 100 treesize of output 80 [2021-08-27 04:27:44,587 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-08-27 04:27:44,588 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 33 [2021-08-27 04:27:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:44,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146799199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:44,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:44,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 43 [2021-08-27 04:27:44,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643168118] [2021-08-27 04:27:44,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 04:27:44,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 04:27:44,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1625, Unknown=2, NotChecked=0, Total=1806 [2021-08-27 04:27:44,597 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:27:53,919 INFO L93 Difference]: Finished difference Result 277 states and 300 transitions. [2021-08-27 04:27:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-27 04:27:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-08-27 04:27:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:27:53,920 INFO L225 Difference]: With dead ends: 277 [2021-08-27 04:27:53,920 INFO L226 Difference]: Without dead ends: 277 [2021-08-27 04:27:53,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 4088.9ms TimeCoverageRelationStatistics Valid=619, Invalid=4070, Unknown=3, NotChecked=0, Total=4692 [2021-08-27 04:27:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-08-27 04:27:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 216. [2021-08-27 04:27:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 191 states have (on average 1.2146596858638743) internal successors, (232), 212 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 235 transitions. [2021-08-27 04:27:53,923 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 235 transitions. Word has length 49 [2021-08-27 04:27:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:27:53,924 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 235 transitions. [2021-08-27 04:27:53,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:27:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 235 transitions. [2021-08-27 04:27:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 04:27:53,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:27:53,924 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:27:53,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 04:27:54,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:54,139 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:27:54,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:27:54,140 INFO L82 PathProgramCache]: Analyzing trace with hash 391444880, now seen corresponding path program 2 times [2021-08-27 04:27:54,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:27:54,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767916661] [2021-08-27 04:27:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:27:54,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:27:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:54,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:27:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:27:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:54,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:27:54,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767916661] [2021-08-27 04:27:54,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767916661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:54,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517449349] [2021-08-27 04:27:54,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:27:54,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:27:54,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:27:54,461 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:27:54,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 04:27:55,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:27:55,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:27:55,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 04:27:55,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:27:55,575 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 [2021-08-27 04:27:55,672 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:27:55,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 04:27:55,719 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 [2021-08-27 04:27:55,722 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 21 treesize of output 17 [2021-08-27 04:27:55,896 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:27:55,896 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 36 treesize of output 27 [2021-08-27 04:27:55,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:55,913 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 26 treesize of output 21 [2021-08-27 04:27:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:56,032 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:27:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-08-27 04:27:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:56,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:27:56,110 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-08-27 04:27:56,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-08-27 04:27:56,203 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-08-27 04:27:56,204 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2021-08-27 04:27:56,221 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:27:56,222 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 43 [2021-08-27 04:27:56,481 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 04:27:56,481 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 73 treesize of output 46 [2021-08-27 04:27:56,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:27:56,490 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 [2021-08-27 04:27:56,565 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-08-27 04:27:56,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 87 [2021-08-27 04:27:56,579 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-08-27 04:27:56,579 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 79 [2021-08-27 04:27:56,917 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-27 04:27:56,917 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 92 treesize of output 72 [2021-08-27 04:27:57,085 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:27:57,085 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 67 treesize of output 34 [2021-08-27 04:27:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:27:59,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517449349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:27:59,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:27:59,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 38 [2021-08-27 04:27:59,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044911615] [2021-08-27 04:27:59,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 04:27:59,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:27:59,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 04:27:59,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1299, Unknown=1, NotChecked=0, Total=1482 [2021-08-27 04:27:59,254 INFO L87 Difference]: Start difference. First operand 216 states and 235 transitions. Second operand has 39 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:28:13,251 INFO L93 Difference]: Finished difference Result 272 states and 296 transitions. [2021-08-27 04:28:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 04:28:13,252 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-08-27 04:28:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:28:13,253 INFO L225 Difference]: With dead ends: 272 [2021-08-27 04:28:13,253 INFO L226 Difference]: Without dead ends: 272 [2021-08-27 04:28:13,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 5559.5ms TimeCoverageRelationStatistics Valid=531, Invalid=3007, Unknown=2, NotChecked=0, Total=3540 [2021-08-27 04:28:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-27 04:28:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 220. [2021-08-27 04:28:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 195 states have (on average 1.2205128205128206) internal successors, (238), 216 states have internal predecessors, (238), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 241 transitions. [2021-08-27 04:28:13,256 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 241 transitions. Word has length 49 [2021-08-27 04:28:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:28:13,256 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 241 transitions. [2021-08-27 04:28:13,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 241 transitions. [2021-08-27 04:28:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 04:28:13,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:28:13,257 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:28:13,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 04:28:13,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-27 04:28:13,472 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:28:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:28:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash 391444881, now seen corresponding path program 2 times [2021-08-27 04:28:13,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:28:13,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723280199] [2021-08-27 04:28:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:13,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:28:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:13,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:28:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:13,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:28:13,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723280199] [2021-08-27 04:28:13,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723280199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:13,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401751714] [2021-08-27 04:28:13,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:28:13,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:28:13,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:28:13,896 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:28:13,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 04:28:15,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:28:15,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:28:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-27 04:28:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:28:15,025 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 [2021-08-27 04:28:15,141 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:28:15,142 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 [2021-08-27 04:28:15,194 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 [2021-08-27 04:28:15,199 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 21 treesize of output 17 [2021-08-27 04:28:15,386 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:28:15,387 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 36 treesize of output 27 [2021-08-27 04:28:15,398 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 26 treesize of output 21 [2021-08-27 04:28:15,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:28:15,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:28:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:28:15,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:28:15,579 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 04:28:15,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 04:28:15,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-08-27 04:28:15,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-08-27 04:28:15,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:28:15,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-27 04:28:15,863 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 04:28:15,863 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 93 treesize of output 66 [2021-08-27 04:28:15,882 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-08-27 04:28:15,883 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2021-08-27 04:28:15,950 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-08-27 04:28:15,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 89 [2021-08-27 04:28:15,973 INFO L354 Elim1Store]: treesize reduction 226, result has 13.1 percent of original size [2021-08-27 04:28:15,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 84 [2021-08-27 04:28:16,527 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-08-27 04:28:16,528 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 105 treesize of output 59 [2021-08-27 04:28:16,539 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-08-27 04:28:16,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 50 treesize of output 36 [2021-08-27 04:28:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:16,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401751714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:16,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:28:16,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-08-27 04:28:16,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210903365] [2021-08-27 04:28:16,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:28:16,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:28:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:28:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:28:16,578 INFO L87 Difference]: Start difference. First operand 220 states and 241 transitions. Second operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:28:21,691 INFO L93 Difference]: Finished difference Result 276 states and 301 transitions. [2021-08-27 04:28:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 04:28:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-08-27 04:28:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:28:21,692 INFO L225 Difference]: With dead ends: 276 [2021-08-27 04:28:21,692 INFO L226 Difference]: Without dead ends: 276 [2021-08-27 04:28:21,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 2312.9ms TimeCoverageRelationStatistics Valid=338, Invalid=2523, Unknown=1, NotChecked=0, Total=2862 [2021-08-27 04:28:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-08-27 04:28:21,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2021-08-27 04:28:21,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 194 states have (on average 1.2164948453608246) internal successors, (236), 215 states have internal predecessors, (236), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 239 transitions. [2021-08-27 04:28:21,695 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 239 transitions. Word has length 49 [2021-08-27 04:28:21,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:28:21,695 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 239 transitions. [2021-08-27 04:28:21,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 37 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 239 transitions. [2021-08-27 04:28:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 04:28:21,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:28:21,696 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:28:21,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 04:28:21,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-27 04:28:21,897 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:28:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:28:21,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1346916309, now seen corresponding path program 2 times [2021-08-27 04:28:21,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:28:21,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882646529] [2021-08-27 04:28:21,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:21,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:28:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:28:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:22,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:28:22,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882646529] [2021-08-27 04:28:22,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882646529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:22,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385888246] [2021-08-27 04:28:22,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:28:22,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:28:22,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:28:22,145 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:28:22,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 04:28:23,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 04:28:23,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:28:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 04:28:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:28:23,485 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 [2021-08-27 04:28:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 04:28:23,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385888246] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:28:23,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:28:23,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2021-08-27 04:28:23,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519710708] [2021-08-27 04:28:23,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:28:23,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:28:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:28:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:28:23,509 INFO L87 Difference]: Start difference. First operand 219 states and 239 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:28:23,647 INFO L93 Difference]: Finished difference Result 226 states and 243 transitions. [2021-08-27 04:28:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:28:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-08-27 04:28:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:28:23,649 INFO L225 Difference]: With dead ends: 226 [2021-08-27 04:28:23,649 INFO L226 Difference]: Without dead ends: 226 [2021-08-27 04:28:23,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:28:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-27 04:28:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2021-08-27 04:28:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 202 states have internal predecessors, (219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 222 transitions. [2021-08-27 04:28:23,651 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 222 transitions. Word has length 50 [2021-08-27 04:28:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:28:23,652 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 222 transitions. [2021-08-27 04:28:23,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 222 transitions. [2021-08-27 04:28:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 04:28:23,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:28:23,652 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:28:23,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 04:28:23,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-27 04:28:23,869 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:28:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:28:23,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2052672236, now seen corresponding path program 1 times [2021-08-27 04:28:23,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:28:23,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318135893] [2021-08-27 04:28:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:23,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:28:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:24,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:28:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:24,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:28:24,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318135893] [2021-08-27 04:28:24,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318135893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:24,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756795708] [2021-08-27 04:28:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:24,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:28:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:28:24,206 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:28:24,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 04:28:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 04:28:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:28:25,430 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 [2021-08-27 04:28:25,529 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:28:25,529 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 [2021-08-27 04:28:25,579 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 [2021-08-27 04:28:25,588 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:28:25,771 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:28:25,771 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 36 treesize of output 27 [2021-08-27 04:28:25,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:28:25,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 21 [2021-08-27 04:28:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:28:25,899 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:28:25,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:28:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:28:25,911 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:28:25,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-08-27 04:28:25,979 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-08-27 04:28:25,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-08-27 04:28:26,073 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-08-27 04:28:26,073 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2021-08-27 04:28:26,086 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:28:26,087 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 43 [2021-08-27 04:28:26,323 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:28:26,323 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 19 treesize of output 18 [2021-08-27 04:28:26,343 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 04:28:26,343 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 73 treesize of output 46 [2021-08-27 04:28:26,419 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-08-27 04:28:26,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 87 [2021-08-27 04:28:26,449 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-08-27 04:28:26,450 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 79 [2021-08-27 04:28:26,825 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-27 04:28:26,825 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 92 treesize of output 72 [2021-08-27 04:28:27,000 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:28:27,001 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 67 treesize of output 34 [2021-08-27 04:28:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:29,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756795708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:29,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:28:29,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 38 [2021-08-27 04:28:29,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245020600] [2021-08-27 04:28:29,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 04:28:29,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:28:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 04:28:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1301, Unknown=1, NotChecked=0, Total=1482 [2021-08-27 04:28:29,184 INFO L87 Difference]: Start difference. First operand 206 states and 222 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:28:41,317 INFO L93 Difference]: Finished difference Result 248 states and 267 transitions. [2021-08-27 04:28:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 04:28:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-08-27 04:28:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:28:41,319 INFO L225 Difference]: With dead ends: 248 [2021-08-27 04:28:41,319 INFO L226 Difference]: Without dead ends: 248 [2021-08-27 04:28:41,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 5538.5ms TimeCoverageRelationStatistics Valid=476, Invalid=2714, Unknown=2, NotChecked=0, Total=3192 [2021-08-27 04:28:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-27 04:28:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 208. [2021-08-27 04:28:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.2131147540983607) internal successors, (222), 204 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2021-08-27 04:28:41,321 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 50 [2021-08-27 04:28:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:28:41,322 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2021-08-27 04:28:41,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2021-08-27 04:28:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 04:28:41,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:28:41,322 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:28:41,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 04:28:41,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:28:41,535 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:28:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:28:41,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2052672235, now seen corresponding path program 1 times [2021-08-27 04:28:41,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:28:41,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466323934] [2021-08-27 04:28:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:41,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:28:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:41,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:28:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:41,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:28:41,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466323934] [2021-08-27 04:28:41,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466323934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:41,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385608436] [2021-08-27 04:28:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:41,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:28:41,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:28:41,980 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:28:41,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 04:28:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-27 04:28:43,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:28:43,334 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 [2021-08-27 04:28:43,437 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:28:43,437 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 [2021-08-27 04:28:43,492 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 [2021-08-27 04:28:43,507 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 21 treesize of output 17 [2021-08-27 04:28:43,692 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:28:43,692 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 36 treesize of output 27 [2021-08-27 04:28:43,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-27 04:28:43,823 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-27 04:28:43,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-08-27 04:28:43,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:28:43,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:28:43,865 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 [2021-08-27 04:28:43,883 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 04:28:43,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 04:28:43,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-08-27 04:28:43,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2021-08-27 04:28:44,180 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-08-27 04:28:44,181 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 113 treesize of output 74 [2021-08-27 04:28:44,195 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-08-27 04:28:44,206 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 66 treesize of output 63 [2021-08-27 04:28:44,284 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-08-27 04:28:44,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 97 [2021-08-27 04:28:44,306 INFO L354 Elim1Store]: treesize reduction 174, result has 13.0 percent of original size [2021-08-27 04:28:44,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 113 [2021-08-27 04:28:44,831 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-08-27 04:28:44,832 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 105 treesize of output 59 [2021-08-27 04:28:44,843 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-08-27 04:28:44,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 50 treesize of output 36 [2021-08-27 04:28:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:44,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385608436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:44,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:28:44,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-08-27 04:28:44,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247126671] [2021-08-27 04:28:44,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:28:44,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:28:44,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:28:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:28:44,885 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:28:49,022 INFO L93 Difference]: Finished difference Result 253 states and 272 transitions. [2021-08-27 04:28:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 04:28:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-08-27 04:28:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:28:49,023 INFO L225 Difference]: With dead ends: 253 [2021-08-27 04:28:49,023 INFO L226 Difference]: Without dead ends: 253 [2021-08-27 04:28:49,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1500.4ms TimeCoverageRelationStatistics Valid=326, Invalid=2430, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:28:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-27 04:28:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-08-27 04:28:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 185 states have (on average 1.2108108108108109) internal successors, (224), 206 states have internal predecessors, (224), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 227 transitions. [2021-08-27 04:28:49,025 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 227 transitions. Word has length 50 [2021-08-27 04:28:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:28:49,026 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 227 transitions. [2021-08-27 04:28:49,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 37 states have internal predecessors, (87), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 227 transitions. [2021-08-27 04:28:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:28:49,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:28:49,026 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:28:49,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-27 04:28:49,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-27 04:28:49,240 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:28:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:28:49,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1487901052, now seen corresponding path program 1 times [2021-08-27 04:28:49,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:28:49,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690364554] [2021-08-27 04:28:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:49,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:28:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:28:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:49,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:28:49,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690364554] [2021-08-27 04:28:49,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690364554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:49,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287792015] [2021-08-27 04:28:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:49,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:28:49,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:28:49,644 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:28:49,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 04:28:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 04:28:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:28:51,082 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 [2021-08-27 04:28:51,137 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:28:51,138 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 [2021-08-27 04:28:51,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:28:51,187 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 [2021-08-27 04:28:51,248 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 [2021-08-27 04:28:51,314 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 [2021-08-27 04:28:51,390 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-27 04:28:51,391 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-08-27 04:28:52,195 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 04:28:52,195 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 82 treesize of output 45 [2021-08-27 04:28:52,201 INFO L354 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2021-08-27 04:28:52,201 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 32 treesize of output 23 [2021-08-27 04:28:52,287 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:28:52,287 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 18 [2021-08-27 04:28:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:52,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287792015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:52,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:28:52,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-08-27 04:28:52,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261414271] [2021-08-27 04:28:52,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 04:28:52,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:28:52,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 04:28:52,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 04:28:52,327 INFO L87 Difference]: Start difference. First operand 210 states and 227 transitions. Second operand has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:28:53,991 INFO L93 Difference]: Finished difference Result 240 states and 259 transitions. [2021-08-27 04:28:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 04:28:53,992 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:28:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:28:53,992 INFO L225 Difference]: With dead ends: 240 [2021-08-27 04:28:53,992 INFO L226 Difference]: Without dead ends: 240 [2021-08-27 04:28:53,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1494.2ms TimeCoverageRelationStatistics Valid=532, Invalid=3758, Unknown=0, NotChecked=0, Total=4290 [2021-08-27 04:28:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-27 04:28:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2021-08-27 04:28:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 202 states have (on average 1.2178217821782178) internal successors, (246), 223 states have internal predecessors, (246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 249 transitions. [2021-08-27 04:28:53,995 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 249 transitions. Word has length 51 [2021-08-27 04:28:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:28:53,995 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 249 transitions. [2021-08-27 04:28:53,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 39 states have internal predecessors, (89), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 249 transitions. [2021-08-27 04:28:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:28:53,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:28:53,996 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:28:54,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-27 04:28:54,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-27 04:28:54,208 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr41REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:28:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:28:54,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1487901053, now seen corresponding path program 1 times [2021-08-27 04:28:54,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:28:54,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368244554] [2021-08-27 04:28:54,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:54,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:28:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:54,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:28:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:54,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:28:54,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368244554] [2021-08-27 04:28:54,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368244554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:54,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701882580] [2021-08-27 04:28:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:54,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:28:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:28:54,453 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:28:54,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-27 04:28:55,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:55,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-27 04:28:55,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:28:56,223 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 37 treesize of output 29 [2021-08-27 04:28:56,225 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 14 [2021-08-27 04:28:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:28:56,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701882580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:56,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:28:56,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2021-08-27 04:28:56,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784742566] [2021-08-27 04:28:56,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:28:56,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:28:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:28:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:28:56,303 INFO L87 Difference]: Start difference. First operand 227 states and 249 transitions. Second operand has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:28:57,523 INFO L93 Difference]: Finished difference Result 272 states and 292 transitions. [2021-08-27 04:28:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 04:28:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:28:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:28:57,525 INFO L225 Difference]: With dead ends: 272 [2021-08-27 04:28:57,525 INFO L226 Difference]: Without dead ends: 272 [2021-08-27 04:28:57,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 852.5ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 04:28:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-27 04:28:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 231. [2021-08-27 04:28:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 206 states have (on average 1.2087378640776698) internal successors, (249), 227 states have internal predecessors, (249), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 252 transitions. [2021-08-27 04:28:57,527 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 252 transitions. Word has length 51 [2021-08-27 04:28:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:28:57,527 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 252 transitions. [2021-08-27 04:28:57,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:28:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 252 transitions. [2021-08-27 04:28:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 04:28:57,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:28:57,528 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:28:57,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-27 04:28:57,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-27 04:28:57,729 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:28:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:28:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1827532024, now seen corresponding path program 2 times [2021-08-27 04:28:57,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:28:57,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439014318] [2021-08-27 04:28:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:28:57,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:28:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:58,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:28:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:28:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:28:58,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:28:58,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439014318] [2021-08-27 04:28:58,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439014318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:28:58,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269630081] [2021-08-27 04:28:58,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:28:58,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:28:58,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:28:58,519 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:28:58,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-27 04:29:00,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:29:00,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:29:00,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-27 04:29:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:00,100 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 [2021-08-27 04:29:00,124 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:29:00,125 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 [2021-08-27 04:29:00,260 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-08-27 04:29:00,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 04:29:00,331 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 [2021-08-27 04:29:00,338 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 25 treesize of output 21 [2021-08-27 04:29:00,589 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:29:00,590 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 26 treesize of output 21 [2021-08-27 04:29:00,602 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 04:29:00,602 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 44 treesize of output 31 [2021-08-27 04:29:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:00,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:29:00,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 30 [2021-08-27 04:29:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:00,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:29:00,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:00,835 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-08-27 04:29:00,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 29 [2021-08-27 04:29:00,928 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:29:00,928 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 37 [2021-08-27 04:29:00,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:00,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-27 04:29:01,169 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 04:29:01,169 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 100 treesize of output 69 [2021-08-27 04:29:01,184 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-08-27 04:29:01,185 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 98 [2021-08-27 04:29:01,336 INFO L354 Elim1Store]: treesize reduction 126, result has 14.9 percent of original size [2021-08-27 04:29:01,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 102 [2021-08-27 04:29:01,359 INFO L354 Elim1Store]: treesize reduction 226, result has 13.1 percent of original size [2021-08-27 04:29:01,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 106 [2021-08-27 04:29:01,867 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 [2021-08-27 04:29:01,972 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-08-27 04:29:01,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 83 [2021-08-27 04:29:03,135 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-08-27 04:29:03,136 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 33 [2021-08-27 04:29:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:29:03,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269630081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:03,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:03,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 43 [2021-08-27 04:29:03,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313170030] [2021-08-27 04:29:03,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 04:29:03,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 04:29:03,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1625, Unknown=2, NotChecked=0, Total=1806 [2021-08-27 04:29:03,144 INFO L87 Difference]: Start difference. First operand 231 states and 252 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:07,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:07,541 INFO L93 Difference]: Finished difference Result 290 states and 314 transitions. [2021-08-27 04:29:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-27 04:29:07,542 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-08-27 04:29:07,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:07,543 INFO L225 Difference]: With dead ends: 290 [2021-08-27 04:29:07,543 INFO L226 Difference]: Without dead ends: 290 [2021-08-27 04:29:07,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 4153.0ms TimeCoverageRelationStatistics Valid=602, Invalid=3951, Unknown=3, NotChecked=0, Total=4556 [2021-08-27 04:29:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-08-27 04:29:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 236. [2021-08-27 04:29:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 211 states have (on average 1.2037914691943128) internal successors, (254), 232 states have internal predecessors, (254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 257 transitions. [2021-08-27 04:29:07,545 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 257 transitions. Word has length 52 [2021-08-27 04:29:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:07,546 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 257 transitions. [2021-08-27 04:29:07,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 257 transitions. [2021-08-27 04:29:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 04:29:07,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:07,546 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:07,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-27 04:29:07,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:07,749 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:29:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:07,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1785513771, now seen corresponding path program 4 times [2021-08-27 04:29:07,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:07,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802470288] [2021-08-27 04:29:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:07,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:08,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:29:08,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:08,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802470288] [2021-08-27 04:29:08,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802470288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:08,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868488430] [2021-08-27 04:29:08,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:29:08,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:08,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:08,044 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:08,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 04:29:09,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:29:09,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:29:09,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 04:29:09,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:09,684 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 [2021-08-27 04:29:09,781 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:29:09,781 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 [2021-08-27 04:29:09,837 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 [2021-08-27 04:29:09,844 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 21 treesize of output 17 [2021-08-27 04:29:10,020 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:29:10,021 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 36 treesize of output 27 [2021-08-27 04:29:10,029 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 26 treesize of output 21 [2021-08-27 04:29:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:10,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:29:10,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:10,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:29:10,226 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 04:29:10,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-08-27 04:29:10,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-27 04:29:10,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-08-27 04:29:10,539 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 04:29:10,539 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 73 treesize of output 46 [2021-08-27 04:29:10,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2021-08-27 04:29:10,665 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-08-27 04:29:10,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 87 [2021-08-27 04:29:10,680 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-08-27 04:29:10,680 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 79 [2021-08-27 04:29:11,032 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-27 04:29:11,032 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 92 treesize of output 72 [2021-08-27 04:29:11,205 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:29:11,205 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 67 treesize of output 34 [2021-08-27 04:29:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:29:13,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868488430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:13,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:13,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2021-08-27 04:29:13,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652284099] [2021-08-27 04:29:13,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 04:29:13,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 04:29:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1374, Unknown=1, NotChecked=0, Total=1560 [2021-08-27 04:29:13,373 INFO L87 Difference]: Start difference. First operand 236 states and 257 transitions. Second operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:27,259 INFO L93 Difference]: Finished difference Result 288 states and 312 transitions. [2021-08-27 04:29:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 04:29:27,259 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-08-27 04:29:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:27,260 INFO L225 Difference]: With dead ends: 288 [2021-08-27 04:29:27,260 INFO L226 Difference]: Without dead ends: 288 [2021-08-27 04:29:27,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 5443.4ms TimeCoverageRelationStatistics Valid=488, Invalid=2816, Unknown=2, NotChecked=0, Total=3306 [2021-08-27 04:29:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-08-27 04:29:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 240. [2021-08-27 04:29:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 215 states have (on average 1.2093023255813953) internal successors, (260), 236 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 263 transitions. [2021-08-27 04:29:27,263 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 263 transitions. Word has length 52 [2021-08-27 04:29:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:27,263 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 263 transitions. [2021-08-27 04:29:27,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 263 transitions. [2021-08-27 04:29:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 04:29:27,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:27,264 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:27,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:27,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:27,485 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:29:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1785513770, now seen corresponding path program 3 times [2021-08-27 04:29:27,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:27,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606795814] [2021-08-27 04:29:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:27,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:27,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:29:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:29:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:29:27,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:29:27,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606795814] [2021-08-27 04:29:27,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606795814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:27,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32529826] [2021-08-27 04:29:27,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:29:27,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:27,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:29:27,836 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:29:27,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-27 04:29:29,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:29:29,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:29:29,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-27 04:29:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:29:29,638 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 [2021-08-27 04:29:29,740 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:29:29,740 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 [2021-08-27 04:29:29,804 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 [2021-08-27 04:29:29,808 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 21 treesize of output 17 [2021-08-27 04:29:30,003 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 04:29:30,004 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 36 treesize of output 27 [2021-08-27 04:29:30,017 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 26 treesize of output 21 [2021-08-27 04:29:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:30,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:29:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 04:29:30,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-08-27 04:29:30,207 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 04:29:30,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-08-27 04:29:30,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-08-27 04:29:30,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2021-08-27 04:29:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-08-27 04:29:30,522 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 04:29:30,523 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 93 treesize of output 66 [2021-08-27 04:29:30,538 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-08-27 04:29:30,539 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 84 [2021-08-27 04:29:30,670 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-08-27 04:29:30,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 89 [2021-08-27 04:29:30,698 INFO L354 Elim1Store]: treesize reduction 226, result has 13.1 percent of original size [2021-08-27 04:29:30,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 84 [2021-08-27 04:29:31,296 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-08-27 04:29:31,297 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 105 treesize of output 59 [2021-08-27 04:29:31,317 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-08-27 04:29:31,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 50 treesize of output 36 [2021-08-27 04:29:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:29:31,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32529826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:29:31,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:29:31,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-08-27 04:29:31,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860616454] [2021-08-27 04:29:31,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 04:29:31,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:29:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 04:29:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 04:29:31,334 INFO L87 Difference]: Start difference. First operand 240 states and 263 transitions. Second operand has 37 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:29:33,096 INFO L93 Difference]: Finished difference Result 292 states and 317 transitions. [2021-08-27 04:29:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 04:29:33,097 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-08-27 04:29:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:29:33,097 INFO L225 Difference]: With dead ends: 292 [2021-08-27 04:29:33,097 INFO L226 Difference]: Without dead ends: 292 [2021-08-27 04:29:33,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1320.1ms TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:29:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-27 04:29:33,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 236. [2021-08-27 04:29:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 211 states have (on average 1.2037914691943128) internal successors, (254), 232 states have internal predecessors, (254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 257 transitions. [2021-08-27 04:29:33,100 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 257 transitions. Word has length 52 [2021-08-27 04:29:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:29:33,101 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 257 transitions. [2021-08-27 04:29:33,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.611111111111111) internal successors, (94), 36 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:29:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 257 transitions. [2021-08-27 04:29:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 04:29:33,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:29:33,101 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:29:33,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-27 04:29:33,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:29:33,313 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr37ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 56 more)] === [2021-08-27 04:29:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:29:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1228025836, now seen corresponding path program 1 times [2021-08-27 04:29:33,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:29:33,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005540678] [2021-08-27 04:29:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:29:33,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:29:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 04:29:33,334 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 04:29:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 04:29:33,363 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 04:29:33,364 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 04:29:33,364 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr37ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 04:29:33,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:29:33,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:29:33,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:29:33,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:29:33,366 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 04:29:33,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 04:29:33,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 04:29:33,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 04:29:33,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 04:29:33,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 04:29:33,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 04:29:33,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 04:29:33,367 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-08-27 04:29:33,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 04:29:33,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 04:29:33,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-08-27 04:29:33,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-08-27 04:29:33,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-08-27 04:29:33,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-08-27 04:29:33,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-08-27 04:29:33,368 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-08-27 04:29:33,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-08-27 04:29:33,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-08-27 04:29:33,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-08-27 04:29:33,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-08-27 04:29:33,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-08-27 04:29:33,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 04:29:33,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-08-27 04:29:33,369 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-08-27 04:29:33,370 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 04:29:33,370 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-08-27 04:29:33,370 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-08-27 04:29:33,370 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-08-27 04:29:33,370 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-08-27 04:29:33,370 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 04:29:33,370 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-08-27 04:29:33,370 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-08-27 04:29:33,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-08-27 04:29:33,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-08-27 04:29:33,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-08-27 04:29:33,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-08-27 04:29:33,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-08-27 04:29:33,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-08-27 04:29:33,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-08-27 04:29:33,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-08-27 04:29:33,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-08-27 04:29:33,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-08-27 04:29:33,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:29:33,373 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:29:33,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-27 04:29:33,379 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:29:33,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:29:33 BoogieIcfgContainer [2021-08-27 04:29:33,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:29:33,415 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:29:33,415 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:29:33,415 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:29:33,416 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:26:24" (3/4) ... [2021-08-27 04:29:33,420 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 04:29:33,449 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:29:33,449 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:29:33,451 INFO L168 Benchmark]: Toolchain (without parser) took 190332.51 ms. Allocated memory was 58.7 MB in the beginning and 685.8 MB in the end (delta: 627.0 MB). Free memory was 36.3 MB in the beginning and 389.7 MB in the end (delta: -353.4 MB). Peak memory consumption was 274.7 MB. Max. memory is 16.1 GB. [2021-08-27 04:29:33,451 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 40.9 MB in the beginning and 40.9 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:29:33,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.70 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 36.1 MB in the beginning and 50.1 MB in the end (delta: -14.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:29:33,452 INFO L168 Benchmark]: Boogie Preprocessor took 83.35 ms. Allocated memory is still 73.4 MB. Free memory was 50.1 MB in the beginning and 47.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:29:33,452 INFO L168 Benchmark]: RCFGBuilder took 830.91 ms. Allocated memory is still 73.4 MB. Free memory was 47.0 MB in the beginning and 44.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2021-08-27 04:29:33,452 INFO L168 Benchmark]: TraceAbstraction took 189013.06 ms. Allocated memory was 73.4 MB in the beginning and 685.8 MB in the end (delta: 612.4 MB). Free memory was 43.6 MB in the beginning and 392.8 MB in the end (delta: -349.2 MB). Peak memory consumption was 261.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:29:33,452 INFO L168 Benchmark]: Witness Printer took 35.40 ms. Allocated memory is still 685.8 MB. Free memory was 392.8 MB in the beginning and 389.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:29:33,453 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 40.9 MB in the beginning and 40.9 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 365.70 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 36.1 MB in the beginning and 50.1 MB in the end (delta: -14.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.35 ms. Allocated memory is still 73.4 MB. Free memory was 50.1 MB in the beginning and 47.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 830.91 ms. Allocated memory is still 73.4 MB. Free memory was 47.0 MB in the beginning and 44.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 189013.06 ms. Allocated memory was 73.4 MB in the beginning and 685.8 MB in the end (delta: 612.4 MB). Free memory was 43.6 MB in the beginning and 392.8 MB in the end (delta: -349.2 MB). Peak memory consumption was 261.5 MB. Max. memory is 16.1 GB. * Witness Printer took 35.40 ms. Allocated memory is still 685.8 MB. Free memory was 392.8 MB in the beginning and 389.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1050]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L1005] SLL* null = malloc(sizeof(SLL)); [L1006] null->colour = BLACK VAL [null={-1:0}] [L1007] null->next = ((void*)0) VAL [null={-1:0}] [L1009] SLL* list = malloc(sizeof(SLL)); [L1010] list->next = null VAL [list={-2:0}, null={-1:0}] [L1011] list->colour = BLACK VAL [list={-2:0}, null={-1:0}] [L1013] SLL* end = list; VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1016] COND TRUE __VERIFIER_nondet_int() [L1019] end->next = malloc(sizeof(SLL)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-3:0}, null={-1:0}] [L1020] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, null={-1:0}] [L1020] end = end->next [L1021] end->next = null VAL [end={-3:0}, list={-2:0}, null={-1:0}] [L1023] COND FALSE !(__VERIFIER_nondet_int()) [L1029] end->colour = RED VAL [end={-3:0}, list={-2:0}, null={-1:0}] [L1030] end->next = malloc(sizeof(SLL)) VAL [end={-3:0}, list={-2:0}, malloc(sizeof(SLL))={-4:0}, null={-1:0}] [L1031] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, null={-1:0}] [L1031] end = end->next [L1032] end->next = null VAL [end={-4:0}, list={-2:0}, null={-1:0}] [L1033] end->colour = BLACK VAL [end={-4:0}, list={-2:0}, null={-1:0}] [L1016] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1041] COND FALSE !(!(null != end)) VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1042] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1042] COND FALSE !(!(BLACK == end->colour)) [L1044] COND TRUE null != end VAL [end={-2:0}, list={-2:0}, null={-1:0}] [L1046] EXPR end->colour VAL [end={-2:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1046] COND FALSE !(RED == end->colour) [L1053] EXPR end->next VAL [end={-2:0}, end->next={-3:0}, list={-2:0}, null={-1:0}] [L1053] end = end->next [L1044] COND TRUE null != end VAL [end={-3:0}, list={-2:0}, null={-1:0}] [L1046] EXPR end->colour VAL [end={-3:0}, end->colour=0, list={-2:0}, null={-1:0}] [L1046] COND TRUE RED == end->colour [L1048] EXPR end->next VAL [end={-3:0}, end->next={-4:0}, list={-2:0}, null={-1:0}] [L1048] end = end->next [L1049] COND FALSE !(!(null != end)) VAL [end={-4:0}, list={-2:0}, null={-1:0}] [L1050] EXPR end->colour VAL [end={-4:0}, end->colour=1, list={-2:0}, null={-1:0}] [L1050] COND TRUE !(BLACK != end->colour) [L1050] reach_error() VAL [end={-4:0}, list={-2:0}, null={-1:0}] - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1007]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1007]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1010]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1020]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1025]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1029]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1031]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1031]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1032]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1042]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1046]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1046]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1050]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1050]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1053]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1059]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1068]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1074]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1074]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1074]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 141 locations, 61 error locations. Started 1 CEGAR loops. OverallTime: 188929.9ms, OverallIterations: 45, TraceHistogramMax: 3, EmptinessCheckTime: 30.5ms, AutomataDifference: 110989.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3087 SDtfs, 12706 SDslu, 22066 SDs, 0 SdLazy, 50794 SolverSat, 2682 SolverUnsat, 46 SolverUnknown, 0 SolverNotchecked, 77370.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2436 GetRequests, 970 SyntacticMatches, 38 SemanticMatches, 1428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17731 ImplicationChecksByTransitivity, 50893.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=240occurred in iteration=43, InterpolantAutomatonStates: 852, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 169.8ms AutomataMinimizationTime, 44 MinimizatonAttempts, 1692 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 291.9ms SsaConstructionTime, 1172.9ms SatisfiabilityAnalysisTime, 47830.5ms InterpolantComputationTime, 2852 NumberOfCodeBlocks, 2826 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 2728 ConstructedInterpolants, 315 QuantifiedInterpolants, 63615 SizeOfPredicates, 413 NumberOfNonLiveVariables, 6521 ConjunctsInSsa, 1199 ConjunctsInUnsatCore, 72 InterpolantComputations, 17 PerfectInterpolantSequences, 36/479 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-27 04:29:33,670 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-27 04:29:33,690 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 137 Received shutdown request...