./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/forester-heap/dll-token-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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/dll-token-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3737fc0f3aa6913a8d0947b211150a1d468e303 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/dll-token-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3737fc0f3aa6913a8d0947b211150a1d468e303 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:39:25,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:39:25,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:39:25,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:39:25,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:39:25,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:39:25,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:39:25,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:39:25,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:39:25,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:39:25,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:39:25,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:39:25,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:39:25,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:39:25,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:39:25,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:39:25,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:39:25,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:39:25,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:39:25,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:39:25,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:39:25,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:39:25,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:39:25,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:39:25,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:39:25,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:39:25,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:39:25,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:39:25,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:39:25,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:39:25,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:39:25,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:39:25,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:39:25,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:39:25,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:39:25,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:39:25,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:39:25,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:39:25,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:39:25,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:39:25,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:39:25,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 06:39:25,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:39:25,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:39:25,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:39:25,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:39:25,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:39:25,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:39:25,461 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:39:25,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:39:25,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:39:25,461 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:39:25,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:39:25,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:39:25,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:39:25,463 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:39:25,463 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:39:25,463 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:39:25,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:39:25,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:39:25,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:39:25,464 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:39:25,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:39:25,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:39:25,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:39:25,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:39:25,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:39:25,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:39:25,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 06:39:25,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 06:39:25,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:39:25,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3737fc0f3aa6913a8d0947b211150a1d468e303 [2021-08-27 06:39:25,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:39:25,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:39:25,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:39:25,796 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:39:25,797 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:39:25,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-token-1.i [2021-08-27 06:39:25,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8068c30de/a5700b25e3e54b99bd57f2093a5cac93/FLAG5b5ee8bf6 [2021-08-27 06:39:26,267 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:39:26,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-1.i [2021-08-27 06:39:26,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8068c30de/a5700b25e3e54b99bd57f2093a5cac93/FLAG5b5ee8bf6 [2021-08-27 06:39:26,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8068c30de/a5700b25e3e54b99bd57f2093a5cac93 [2021-08-27 06:39:26,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:39:26,653 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:39:26,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:39:26,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:39:26,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:39:26,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:39:26" (1/1) ... [2021-08-27 06:39:26,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60da07be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:26, skipping insertion in model container [2021-08-27 06:39:26,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:39:26" (1/1) ... [2021-08-27 06:39:26,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:39:26,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:39:27,009 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/dll-token-1.i[22229,22242] [2021-08-27 06:39:27,014 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/dll-token-1.i[22398,22411] [2021-08-27 06:39:27,015 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/dll-token-1.i[22489,22502] [2021-08-27 06:39:27,016 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/dll-token-1.i[22571,22584] [2021-08-27 06:39:27,017 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/dll-token-1.i[22649,22662] [2021-08-27 06:39:27,019 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/dll-token-1.i[22795,22808] [2021-08-27 06:39:27,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:39:27,036 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:39:27,085 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/dll-token-1.i[22229,22242] [2021-08-27 06:39:27,087 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/dll-token-1.i[22398,22411] [2021-08-27 06:39:27,088 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/dll-token-1.i[22489,22502] [2021-08-27 06:39:27,088 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/dll-token-1.i[22571,22584] [2021-08-27 06:39:27,089 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/dll-token-1.i[22649,22662] [2021-08-27 06:39:27,093 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/dll-token-1.i[22795,22808] [2021-08-27 06:39:27,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:39:27,119 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:39:27,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27 WrapperNode [2021-08-27 06:39:27,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:39:27,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:39:27,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:39:27,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:39:27,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (1/1) ... [2021-08-27 06:39:27,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (1/1) ... [2021-08-27 06:39:27,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (1/1) ... [2021-08-27 06:39:27,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (1/1) ... [2021-08-27 06:39:27,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (1/1) ... [2021-08-27 06:39:27,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (1/1) ... [2021-08-27 06:39:27,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (1/1) ... [2021-08-27 06:39:27,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:39:27,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:39:27,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:39:27,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:39:27,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (1/1) ... [2021-08-27 06:39:27,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:39:27,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:39:27,198 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 06:39:27,201 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 06:39:27,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:39:27,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:39:27,229 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 06:39:27,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:39:27,229 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 06:39:27,229 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 06:39:27,229 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 06:39:27,230 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 06:39:27,230 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 06:39:27,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 06:39:27,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 06:39:27,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 06:39:27,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 06:39:27,230 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 06:39:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 06:39:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 06:39:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 06:39:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 06:39:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 06:39:27,231 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 06:39:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 06:39:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 06:39:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 06:39:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 06:39:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 06:39:27,232 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 06:39:27,234 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 06:39:27,234 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 06:39:27,234 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 06:39:27,234 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 06:39:27,234 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 06:39:27,234 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 06:39:27,234 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 06:39:27,235 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 06:39:27,235 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 06:39:27,235 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 06:39:27,235 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 06:39:27,235 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 06:39:27,235 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 06:39:27,236 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 06:39:27,236 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 06:39:27,236 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 06:39:27,236 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 06:39:27,236 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 06:39:27,236 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 06:39:27,236 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 06:39:27,237 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 06:39:27,237 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 06:39:27,237 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 06:39:27,237 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 06:39:27,237 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 06:39:27,237 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 06:39:27,237 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 06:39:27,238 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 06:39:27,238 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 06:39:27,238 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 06:39:27,238 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 06:39:27,238 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 06:39:27,238 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 06:39:27,238 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 06:39:27,239 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 06:39:27,239 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 06:39:27,239 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 06:39:27,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 06:39:27,239 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 06:39:27,239 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 06:39:27,239 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 06:39:27,240 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 06:39:27,240 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 06:39:27,240 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 06:39:27,240 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 06:39:27,240 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 06:39:27,240 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 06:39:27,240 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 06:39:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 06:39:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 06:39:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 06:39:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 06:39:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 06:39:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 06:39:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 06:39:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 06:39:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 06:39:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 06:39:27,242 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 06:39:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 06:39:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 06:39:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 06:39:27,250 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 06:39:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 06:39:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 06:39:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 06:39:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 06:39:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 06:39:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 06:39:27,251 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 06:39:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 06:39:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 06:39:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 06:39:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 06:39:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 06:39:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 06:39:27,252 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 06:39:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 06:39:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 06:39:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 06:39:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 06:39:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 06:39:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 06:39:27,253 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 06:39:27,254 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 06:39:27,254 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 06:39:27,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:39:27,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:39:27,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 06:39:27,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 06:39:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 06:39:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 06:39:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 06:39:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:39:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:39:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 06:39:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:39:27,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:39:27,813 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-08-27 06:39:27,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:39:27 BoogieIcfgContainer [2021-08-27 06:39:27,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:39:27,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:39:27,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:39:27,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:39:27,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:39:26" (1/3) ... [2021-08-27 06:39:27,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9bd832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:39:27, skipping insertion in model container [2021-08-27 06:39:27,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:39:27" (2/3) ... [2021-08-27 06:39:27,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9bd832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:39:27, skipping insertion in model container [2021-08-27 06:39:27,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:39:27" (3/3) ... [2021-08-27 06:39:27,829 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-1.i [2021-08-27 06:39:27,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:39:27,839 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2021-08-27 06:39:27,880 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:39:27,889 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 06:39:27,889 INFO L340 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2021-08-27 06:39:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 136 states have internal predecessors, (160), 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 06:39:27,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 06:39:27,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:27,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:27,914 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:27,919 INFO L82 PathProgramCache]: Analyzing trace with hash -106181274, now seen corresponding path program 1 times [2021-08-27 06:39:27,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:27,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034906795] [2021-08-27 06:39:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:27,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:28,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:28,174 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 06:39:28,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:28,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034906795] [2021-08-27 06:39:28,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034906795] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:28,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:28,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:39:28,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68592379] [2021-08-27 06:39:28,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:39:28,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:28,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:39:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:39:28,200 INFO L87 Difference]: Start difference. First operand has 141 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 136 states have internal predecessors, (160), 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 06:39:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:28,512 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2021-08-27 06:39:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:39:28,513 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 06:39:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:28,520 INFO L225 Difference]: With dead ends: 158 [2021-08-27 06:39:28,521 INFO L226 Difference]: Without dead ends: 155 [2021-08-27 06:39:28,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:39:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-27 06:39:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 135. [2021-08-27 06:39:28,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 71 states have (on average 1.8873239436619718) internal successors, (134), 131 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 06:39:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-08-27 06:39:28,555 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 7 [2021-08-27 06:39:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:28,555 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-08-27 06:39:28,555 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 06:39:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-08-27 06:39:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 06:39:28,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:28,556 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:28,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 06:39:28,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:28,557 INFO L82 PathProgramCache]: Analyzing trace with hash -106181273, now seen corresponding path program 1 times [2021-08-27 06:39:28,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:28,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391051029] [2021-08-27 06:39:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:28,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:28,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:39:28,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:28,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391051029] [2021-08-27 06:39:28,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391051029] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:28,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:28,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:39:28,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220501074] [2021-08-27 06:39:28,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:39:28,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:39:28,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:39:28,641 INFO L87 Difference]: Start difference. First operand 135 states and 137 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 06:39:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:28,850 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2021-08-27 06:39:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:39:28,851 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 06:39:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:28,852 INFO L225 Difference]: With dead ends: 160 [2021-08-27 06:39:28,852 INFO L226 Difference]: Without dead ends: 160 [2021-08-27 06:39:28,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:39:28,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-27 06:39:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2021-08-27 06:39:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 128 states have internal predecessors, (131), 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 06:39:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-08-27 06:39:28,861 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 7 [2021-08-27 06:39:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:28,861 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-08-27 06:39:28,861 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 06:39:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-08-27 06:39:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 06:39:28,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:28,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:28,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 06:39:28,863 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:28,863 INFO L82 PathProgramCache]: Analyzing trace with hash 550299256, now seen corresponding path program 1 times [2021-08-27 06:39:28,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:28,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368484977] [2021-08-27 06:39:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:28,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:28,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:28,942 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 06:39:28,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:28,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368484977] [2021-08-27 06:39:28,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368484977] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:28,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:28,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:39:28,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174951799] [2021-08-27 06:39:28,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:39:28,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:39:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:39:28,945 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 06:39:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:29,190 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2021-08-27 06:39:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:39:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-08-27 06:39:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:29,196 INFO L225 Difference]: With dead ends: 136 [2021-08-27 06:39:29,196 INFO L226 Difference]: Without dead ends: 136 [2021-08-27 06:39:29,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-27 06:39:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 119. [2021-08-27 06:39:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 73 states have (on average 1.643835616438356) internal successors, (120), 115 states have internal predecessors, (120), 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 06:39:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2021-08-27 06:39:29,220 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 13 [2021-08-27 06:39:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:29,220 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2021-08-27 06:39:29,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 06:39:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2021-08-27 06:39:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 06:39:29,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:29,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:29,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 06:39:29,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:29,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:29,223 INFO L82 PathProgramCache]: Analyzing trace with hash 550299257, now seen corresponding path program 1 times [2021-08-27 06:39:29,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:29,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372352092] [2021-08-27 06:39:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:29,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:29,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:29,313 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 06:39:29,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:29,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372352092] [2021-08-27 06:39:29,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372352092] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:29,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:29,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:39:29,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306050622] [2021-08-27 06:39:29,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:39:29,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:29,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:39:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:39:29,315 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 06:39:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:29,600 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2021-08-27 06:39:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:39:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-08-27 06:39:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:29,603 INFO L225 Difference]: With dead ends: 211 [2021-08-27 06:39:29,603 INFO L226 Difference]: Without dead ends: 211 [2021-08-27 06:39:29,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-27 06:39:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2021-08-27 06:39:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 110 states have (on average 1.5272727272727273) internal successors, (168), 152 states have internal predecessors, (168), 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 06:39:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 171 transitions. [2021-08-27 06:39:29,620 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 171 transitions. Word has length 13 [2021-08-27 06:39:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:29,621 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 171 transitions. [2021-08-27 06:39:29,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 06:39:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 171 transitions. [2021-08-27 06:39:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:39:29,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:29,622 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:29,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 06:39:29,623 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:29,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash 75654871, now seen corresponding path program 1 times [2021-08-27 06:39:29,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:29,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396178639] [2021-08-27 06:39:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:29,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:29,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:29,746 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 06:39:29,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:29,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396178639] [2021-08-27 06:39:29,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396178639] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:29,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:29,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:39:29,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958989297] [2021-08-27 06:39:29,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:39:29,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:39:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:29,749 INFO L87 Difference]: Start difference. First operand 156 states and 171 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 06:39:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:29,994 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-08-27 06:39:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:39:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 16 [2021-08-27 06:39:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:29,995 INFO L225 Difference]: With dead ends: 155 [2021-08-27 06:39:29,995 INFO L226 Difference]: Without dead ends: 155 [2021-08-27 06:39:29,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:39:29,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-27 06:39:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-08-27 06:39:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 110 states have (on average 1.509090909090909) internal successors, (166), 151 states have internal predecessors, (166), 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 06:39:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 169 transitions. [2021-08-27 06:39:30,000 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 169 transitions. Word has length 16 [2021-08-27 06:39:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:30,000 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 169 transitions. [2021-08-27 06:39:30,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 06:39:30,000 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 169 transitions. [2021-08-27 06:39:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:39:30,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:30,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:30,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 06:39:30,001 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:30,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:30,002 INFO L82 PathProgramCache]: Analyzing trace with hash 75654872, now seen corresponding path program 1 times [2021-08-27 06:39:30,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:30,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99048169] [2021-08-27 06:39:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:30,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:30,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:30,103 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 06:39:30,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:30,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99048169] [2021-08-27 06:39:30,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99048169] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:30,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:30,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:39:30,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923152904] [2021-08-27 06:39:30,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:39:30,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:39:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:30,111 INFO L87 Difference]: Start difference. First operand 155 states and 169 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 06:39:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:30,326 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2021-08-27 06:39:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:39:30,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 16 [2021-08-27 06:39:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:30,332 INFO L225 Difference]: With dead ends: 154 [2021-08-27 06:39:30,332 INFO L226 Difference]: Without dead ends: 154 [2021-08-27 06:39:30,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:39:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-27 06:39:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-08-27 06:39:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.490909090909091) internal successors, (164), 150 states have internal predecessors, (164), 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 06:39:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2021-08-27 06:39:30,336 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 16 [2021-08-27 06:39:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:30,336 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2021-08-27 06:39:30,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 06:39:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2021-08-27 06:39:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 06:39:30,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:30,337 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:30,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 06:39:30,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -931365320, now seen corresponding path program 1 times [2021-08-27 06:39:30,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:30,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774951358] [2021-08-27 06:39:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:30,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:30,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:30,406 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 06:39:30,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:30,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774951358] [2021-08-27 06:39:30,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774951358] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:30,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:30,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:39:30,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691529880] [2021-08-27 06:39:30,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:39:30,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:30,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:39:30,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:30,409 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 06:39:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:30,630 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2021-08-27 06:39:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:39:30,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 18 [2021-08-27 06:39:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:30,632 INFO L225 Difference]: With dead ends: 153 [2021-08-27 06:39:30,632 INFO L226 Difference]: Without dead ends: 153 [2021-08-27 06:39:30,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:39:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-27 06:39:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-08-27 06:39:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 149 states have internal predecessors, (162), 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 06:39:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 165 transitions. [2021-08-27 06:39:30,635 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 165 transitions. Word has length 18 [2021-08-27 06:39:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:30,636 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 165 transitions. [2021-08-27 06:39:30,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 06:39:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 165 transitions. [2021-08-27 06:39:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 06:39:30,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:30,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:30,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 06:39:30,637 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:30,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:30,637 INFO L82 PathProgramCache]: Analyzing trace with hash -931365319, now seen corresponding path program 1 times [2021-08-27 06:39:30,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:30,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967265473] [2021-08-27 06:39:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:30,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:30,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:30,738 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 06:39:30,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:30,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967265473] [2021-08-27 06:39:30,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967265473] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:30,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:30,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:39:30,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185542381] [2021-08-27 06:39:30,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:39:30,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:30,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:39:30,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:30,741 INFO L87 Difference]: Start difference. First operand 153 states and 165 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 06:39:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:30,964 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2021-08-27 06:39:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:39:30,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 18 [2021-08-27 06:39:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:30,966 INFO L225 Difference]: With dead ends: 152 [2021-08-27 06:39:30,966 INFO L226 Difference]: Without dead ends: 152 [2021-08-27 06:39:30,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:39:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-27 06:39:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-08-27 06:39:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 110 states have (on average 1.4545454545454546) internal successors, (160), 148 states have internal predecessors, (160), 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 06:39:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2021-08-27 06:39:30,970 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 18 [2021-08-27 06:39:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:30,970 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2021-08-27 06:39:30,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 06:39:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2021-08-27 06:39:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:39:30,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:30,971 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 06:39:30,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 06:39:30,971 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:30,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1665541607, now seen corresponding path program 1 times [2021-08-27 06:39:30,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:30,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301103732] [2021-08-27 06:39:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:30,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:31,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:31,122 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 06:39:31,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:31,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301103732] [2021-08-27 06:39:31,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301103732] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:31,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:31,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 06:39:31,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763450701] [2021-08-27 06:39:31,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 06:39:31,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 06:39:31,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:39:31,124 INFO L87 Difference]: Start difference. First operand 152 states and 163 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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 06:39:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:31,477 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2021-08-27 06:39:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 06:39:31,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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 06:39:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:31,479 INFO L225 Difference]: With dead ends: 156 [2021-08-27 06:39:31,480 INFO L226 Difference]: Without dead ends: 156 [2021-08-27 06:39:31,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:39:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-27 06:39:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 151. [2021-08-27 06:39:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 147 states have internal predecessors, (159), 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 06:39:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2021-08-27 06:39:31,484 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 20 [2021-08-27 06:39:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:31,484 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2021-08-27 06:39:31,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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 06:39:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2021-08-27 06:39:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:39:31,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:31,485 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 06:39:31,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 06:39:31,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:31,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1665541606, now seen corresponding path program 1 times [2021-08-27 06:39:31,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:31,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837050929] [2021-08-27 06:39:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:31,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:31,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:31,665 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 06:39:31,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:31,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837050929] [2021-08-27 06:39:31,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837050929] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:31,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:31,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 06:39:31,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139048325] [2021-08-27 06:39:31,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 06:39:31,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 06:39:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:39:31,667 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 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 06:39:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:32,282 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2021-08-27 06:39:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 06:39:32,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 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 06:39:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:32,283 INFO L225 Difference]: With dead ends: 153 [2021-08-27 06:39:32,284 INFO L226 Difference]: Without dead ends: 153 [2021-08-27 06:39:32,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-27 06:39:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-27 06:39:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 127. [2021-08-27 06:39:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 94 states have (on average 1.425531914893617) internal successors, (134), 123 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 06:39:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2021-08-27 06:39:32,288 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 20 [2021-08-27 06:39:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:32,288 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2021-08-27 06:39:32,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 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 06:39:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2021-08-27 06:39:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:39:32,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:32,291 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] [2021-08-27 06:39:32,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 06:39:32,292 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr27REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:32,292 INFO L82 PathProgramCache]: Analyzing trace with hash -815463296, now seen corresponding path program 1 times [2021-08-27 06:39:32,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:32,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243073493] [2021-08-27 06:39:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:32,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:32,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:32,419 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 06:39:32,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:32,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243073493] [2021-08-27 06:39:32,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243073493] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:32,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:32,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 06:39:32,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594819199] [2021-08-27 06:39:32,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 06:39:32,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 06:39:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:39:32,421 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 06:39:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:32,787 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2021-08-27 06:39:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:39:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 21 [2021-08-27 06:39:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:32,788 INFO L225 Difference]: With dead ends: 130 [2021-08-27 06:39:32,788 INFO L226 Difference]: Without dead ends: 130 [2021-08-27 06:39:32,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:39:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-27 06:39:32,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-08-27 06:39:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 1.4148936170212767) internal successors, (133), 122 states have internal predecessors, (133), 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 06:39:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-08-27 06:39:32,791 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 21 [2021-08-27 06:39:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:32,791 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-08-27 06:39:32,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 06:39:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-08-27 06:39:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:39:32,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:32,791 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] [2021-08-27 06:39:32,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 06:39:32,792 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:32,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:32,792 INFO L82 PathProgramCache]: Analyzing trace with hash -815463295, now seen corresponding path program 1 times [2021-08-27 06:39:32,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:32,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494676608] [2021-08-27 06:39:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:32,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:32,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:32,918 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 06:39:32,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:32,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494676608] [2021-08-27 06:39:32,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494676608] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:32,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:32,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 06:39:32,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266514296] [2021-08-27 06:39:32,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 06:39:32,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 06:39:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:39:32,920 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 06:39:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:33,262 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-08-27 06:39:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:39:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 21 [2021-08-27 06:39:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:33,264 INFO L225 Difference]: With dead ends: 129 [2021-08-27 06:39:33,264 INFO L226 Difference]: Without dead ends: 129 [2021-08-27 06:39:33,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:39:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-27 06:39:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2021-08-27 06:39:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 94 states have (on average 1.4042553191489362) 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 06:39:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2021-08-27 06:39:33,267 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 21 [2021-08-27 06:39:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:33,267 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2021-08-27 06:39:33,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 06:39:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2021-08-27 06:39:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 06:39:33,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:33,268 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] [2021-08-27 06:39:33,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 06:39:33,268 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr16ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1437317817, now seen corresponding path program 1 times [2021-08-27 06:39:33,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:33,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148174569] [2021-08-27 06:39:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:33,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:33,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:33,410 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 06:39:33,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:33,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148174569] [2021-08-27 06:39:33,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148174569] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:33,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:33,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 06:39:33,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782292716] [2021-08-27 06:39:33,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 06:39:33,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 06:39:33,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:39:33,412 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 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 06:39:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:33,980 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2021-08-27 06:39:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 06:39:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 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 22 [2021-08-27 06:39:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:33,982 INFO L225 Difference]: With dead ends: 147 [2021-08-27 06:39:33,982 INFO L226 Difference]: Without dead ends: 147 [2021-08-27 06:39:33,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-08-27 06:39:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-27 06:39:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 123. [2021-08-27 06:39:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 119 states have internal predecessors, (130), 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 06:39:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2021-08-27 06:39:33,985 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 22 [2021-08-27 06:39:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:33,985 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2021-08-27 06:39:33,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 11 states have internal predecessors, (19), 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 06:39:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2021-08-27 06:39:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 06:39:33,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:33,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:39:33,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 06:39:33,986 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:33,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1131965188, now seen corresponding path program 1 times [2021-08-27 06:39:33,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:33,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362710048] [2021-08-27 06:39:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:33,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:34,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:34,034 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 06:39:34,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:34,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362710048] [2021-08-27 06:39:34,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362710048] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:34,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:34,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:39:34,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976664286] [2021-08-27 06:39:34,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:39:34,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:39:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:39:34,036 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 06:39:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:34,209 INFO L93 Difference]: Finished difference Result 185 states and 190 transitions. [2021-08-27 06:39:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:39:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 24 [2021-08-27 06:39:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:34,211 INFO L225 Difference]: With dead ends: 185 [2021-08-27 06:39:34,211 INFO L226 Difference]: Without dead ends: 185 [2021-08-27 06:39:34,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-08-27 06:39:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 121. [2021-08-27 06:39:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 92 states have (on average 1.391304347826087) internal successors, (128), 117 states have internal predecessors, (128), 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 06:39:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2021-08-27 06:39:34,214 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 24 [2021-08-27 06:39:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:34,214 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2021-08-27 06:39:34,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 06:39:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2021-08-27 06:39:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 06:39:34,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:34,215 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] [2021-08-27 06:39:34,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 06:39:34,215 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr39ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash 554090547, now seen corresponding path program 1 times [2021-08-27 06:39:34,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:34,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751305829] [2021-08-27 06:39:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:34,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:34,273 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 06:39:34,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:34,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751305829] [2021-08-27 06:39:34,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751305829] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:34,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:34,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:39:34,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561729769] [2021-08-27 06:39:34,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:39:34,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:34,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:39:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:34,275 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 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 06:39:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:34,460 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-08-27 06:39:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:39:34,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 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 29 [2021-08-27 06:39:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:34,461 INFO L225 Difference]: With dead ends: 119 [2021-08-27 06:39:34,461 INFO L226 Difference]: Without dead ends: 119 [2021-08-27 06:39:34,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:39:34,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-27 06:39:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-08-27 06:39:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 91 states have (on average 1.3736263736263736) internal successors, (125), 115 states have internal predecessors, (125), 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 06:39:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2021-08-27 06:39:34,464 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 29 [2021-08-27 06:39:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:34,464 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2021-08-27 06:39:34,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 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 06:39:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2021-08-27 06:39:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 06:39:34,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:34,465 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] [2021-08-27 06:39:34,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 06:39:34,465 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:34,466 INFO L82 PathProgramCache]: Analyzing trace with hash 554123318, now seen corresponding path program 1 times [2021-08-27 06:39:34,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:34,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156707118] [2021-08-27 06:39:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:34,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:34,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:34,753 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 06:39:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:34,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156707118] [2021-08-27 06:39:34,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156707118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:34,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:34,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 06:39:34,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647033063] [2021-08-27 06:39:34,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:39:34,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:34,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:39:34,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:39:34,756 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 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 06:39:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:35,298 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2021-08-27 06:39:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 06:39:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 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 29 [2021-08-27 06:39:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:35,299 INFO L225 Difference]: With dead ends: 223 [2021-08-27 06:39:35,299 INFO L226 Difference]: Without dead ends: 223 [2021-08-27 06:39:35,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-08-27 06:39:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-27 06:39:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 135. [2021-08-27 06:39:35,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 107 states have (on average 1.3271028037383177) internal successors, (142), 131 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 06:39:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 145 transitions. [2021-08-27 06:39:35,303 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 145 transitions. Word has length 29 [2021-08-27 06:39:35,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:35,303 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 145 transitions. [2021-08-27 06:39:35,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 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 06:39:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 145 transitions. [2021-08-27 06:39:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 06:39:35,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:35,304 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] [2021-08-27 06:39:35,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 06:39:35,304 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1356236695, now seen corresponding path program 1 times [2021-08-27 06:39:35,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:35,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124267310] [2021-08-27 06:39:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:35,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:35,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:35,483 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 06:39:35,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:35,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124267310] [2021-08-27 06:39:35,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124267310] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:35,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:35,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 06:39:35,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889066576] [2021-08-27 06:39:35,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:39:35,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:39:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:39:35,485 INFO L87 Difference]: Start difference. First operand 135 states and 145 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 06:39:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:36,042 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2021-08-27 06:39:36,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 06:39:36,042 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 32 [2021-08-27 06:39:36,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:36,043 INFO L225 Difference]: With dead ends: 189 [2021-08-27 06:39:36,043 INFO L226 Difference]: Without dead ends: 189 [2021-08-27 06:39:36,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-08-27 06:39:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-27 06:39:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 141. [2021-08-27 06:39:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 113 states have (on average 1.3185840707964602) internal successors, (149), 137 states have internal predecessors, (149), 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 06:39:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2021-08-27 06:39:36,050 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 32 [2021-08-27 06:39:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:36,051 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2021-08-27 06:39:36,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 06:39:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2021-08-27 06:39:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 06:39:36,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:36,051 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] [2021-08-27 06:39:36,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 06:39:36,052 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr43REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1356236696, now seen corresponding path program 1 times [2021-08-27 06:39:36,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:36,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120781304] [2021-08-27 06:39:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:36,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:36,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:36,306 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 06:39:36,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:36,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120781304] [2021-08-27 06:39:36,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120781304] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:36,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:36,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 06:39:36,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777041219] [2021-08-27 06:39:36,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:39:36,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:36,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:39:36,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:39:36,308 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 06:39:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:36,913 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2021-08-27 06:39:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 06:39:36,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 32 [2021-08-27 06:39:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:36,914 INFO L225 Difference]: With dead ends: 221 [2021-08-27 06:39:36,914 INFO L226 Difference]: Without dead ends: 221 [2021-08-27 06:39:36,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-08-27 06:39:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-27 06:39:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 141. [2021-08-27 06:39:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 137 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 06:39:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2021-08-27 06:39:36,918 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 32 [2021-08-27 06:39:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:36,918 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2021-08-27 06:39:36,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 06:39:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2021-08-27 06:39:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 06:39:36,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:36,919 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] [2021-08-27 06:39:36,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 06:39:36,919 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:36,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1968378007, now seen corresponding path program 1 times [2021-08-27 06:39:36,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:36,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017651546] [2021-08-27 06:39:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:36,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:37,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:37,201 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 06:39:37,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:37,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017651546] [2021-08-27 06:39:37,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017651546] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:37,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:37,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-27 06:39:37,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235611946] [2021-08-27 06:39:37,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 06:39:37,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:37,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 06:39:37,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:39:37,203 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 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 06:39:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:37,912 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2021-08-27 06:39:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 06:39:37,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 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 34 [2021-08-27 06:39:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:37,914 INFO L225 Difference]: With dead ends: 219 [2021-08-27 06:39:37,914 INFO L226 Difference]: Without dead ends: 219 [2021-08-27 06:39:37,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-08-27 06:39:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-27 06:39:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 142. [2021-08-27 06:39:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 138 states have internal predecessors, (149), 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 06:39:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2021-08-27 06:39:37,918 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 34 [2021-08-27 06:39:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:37,918 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2021-08-27 06:39:37,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 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 06:39:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2021-08-27 06:39:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 06:39:37,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:37,919 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, 1] [2021-08-27 06:39:37,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 06:39:37,919 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr54ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:37,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:37,919 INFO L82 PathProgramCache]: Analyzing trace with hash -385780622, now seen corresponding path program 1 times [2021-08-27 06:39:37,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:37,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807590740] [2021-08-27 06:39:37,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:37,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:37,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:37,976 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 06:39:37,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:37,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807590740] [2021-08-27 06:39:37,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807590740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:37,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:37,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:39:37,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795688997] [2021-08-27 06:39:37,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:39:37,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:37,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:39:37,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:37,978 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 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 06:39:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:38,137 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2021-08-27 06:39:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:39:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 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 40 [2021-08-27 06:39:38,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:38,143 INFO L225 Difference]: With dead ends: 140 [2021-08-27 06:39:38,144 INFO L226 Difference]: Without dead ends: 140 [2021-08-27 06:39:38,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:39:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-27 06:39:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-08-27 06:39:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 113 states have (on average 1.2920353982300885) internal successors, (146), 136 states have internal predecessors, (146), 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 06:39:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2021-08-27 06:39:38,146 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 40 [2021-08-27 06:39:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:38,147 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2021-08-27 06:39:38,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 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 06:39:38,147 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2021-08-27 06:39:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 06:39:38,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:38,147 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, 1, 1] [2021-08-27 06:39:38,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-27 06:39:38,148 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash 927086162, now seen corresponding path program 1 times [2021-08-27 06:39:38,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:38,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231150859] [2021-08-27 06:39:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:38,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:38,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:38,204 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 06:39:38,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:38,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231150859] [2021-08-27 06:39:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231150859] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:38,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:38,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:39:38,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881447249] [2021-08-27 06:39:38,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:39:38,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:38,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:39:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:39:38,207 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 06:39:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:38,354 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2021-08-27 06:39:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:39:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 41 [2021-08-27 06:39:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:38,356 INFO L225 Difference]: With dead ends: 156 [2021-08-27 06:39:38,356 INFO L226 Difference]: Without dead ends: 156 [2021-08-27 06:39:38,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:39:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-27 06:39:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-08-27 06:39:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 138 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 06:39:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2021-08-27 06:39:38,359 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 41 [2021-08-27 06:39:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:38,359 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2021-08-27 06:39:38,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 06:39:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2021-08-27 06:39:38,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 06:39:38,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:38,360 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] [2021-08-27 06:39:38,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-27 06:39:38,360 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:38,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:38,360 INFO L82 PathProgramCache]: Analyzing trace with hash -84958043, now seen corresponding path program 1 times [2021-08-27 06:39:38,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:38,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478208576] [2021-08-27 06:39:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:38,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:38,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:38,893 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 06:39:38,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:38,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478208576] [2021-08-27 06:39:38,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478208576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:39:38,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017854835] [2021-08-27 06:39:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:38,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:39:38,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:39:38,899 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 06:39:38,902 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 06:39:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:39,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 06:39:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:39:39,230 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 06:39:39,261 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 06:39:39,399 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:39:39,399 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 06:39:39,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:39:39,470 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 06:39:39,477 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 06:39:39,652 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:39:39,653 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 70 treesize of output 52 [2021-08-27 06:39:39,669 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-27 06:39:39,669 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 62 treesize of output 34 [2021-08-27 06:39:39,817 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:39:39,817 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 17 [2021-08-27 06:39:39,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:39:39,872 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 06:39:40,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2021-08-27 06:39:40,126 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:39:40,128 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 06:39:40,208 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-27 06:39:40,208 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 06:39:40,219 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 06:39:40,384 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:39:40,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 65 [2021-08-27 06:39:40,410 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-27 06:39:40,410 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 79 treesize of output 54 [2021-08-27 06:39:40,527 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:39:40,528 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 50 treesize of output 31 [2021-08-27 06:39:40,638 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-27 06:39:40,638 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 06:39:41,116 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-27 06:39:41,117 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 45 treesize of output 25 [2021-08-27 06:39:41,123 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 06:39:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017854835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:39:41,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:39:41,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 35 [2021-08-27 06:39:41,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478601033] [2021-08-27 06:39:41,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 06:39:41,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 06:39:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 06:39:41,126 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 06:39:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:49,784 INFO L93 Difference]: Finished difference Result 260 states and 269 transitions. [2021-08-27 06:39:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 06:39:49,784 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 41 [2021-08-27 06:39:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:49,785 INFO L225 Difference]: With dead ends: 260 [2021-08-27 06:39:49,785 INFO L226 Difference]: Without dead ends: 260 [2021-08-27 06:39:49,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 2653.5ms TimeCoverageRelationStatistics Valid=502, Invalid=2690, Unknown=0, NotChecked=0, Total=3192 [2021-08-27 06:39:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-08-27 06:39:49,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 170. [2021-08-27 06:39:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 143 states have (on average 1.2447552447552448) internal successors, (178), 166 states have internal predecessors, (178), 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 06:39:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 181 transitions. [2021-08-27 06:39:49,790 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 181 transitions. Word has length 41 [2021-08-27 06:39:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:49,790 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 181 transitions. [2021-08-27 06:39:49,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 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 06:39:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 181 transitions. [2021-08-27 06:39:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-27 06:39:49,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:49,791 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, 1, 1, 1] [2021-08-27 06:39:49,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-27 06:39:49,996 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,SelfDestructingSolverStorable21 [2021-08-27 06:39:49,997 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr57ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:49,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1367856744, now seen corresponding path program 1 times [2021-08-27 06:39:49,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:49,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418757169] [2021-08-27 06:39:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:49,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:50,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:50,206 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 06:39:50,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:50,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418757169] [2021-08-27 06:39:50,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418757169] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:50,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:50,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 06:39:50,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574816030] [2021-08-27 06:39:50,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:39:50,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:50,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:39:50,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:39:50,208 INFO L87 Difference]: Start difference. First operand 170 states and 181 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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 06:39:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:50,732 INFO L93 Difference]: Finished difference Result 229 states and 235 transitions. [2021-08-27 06:39:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 06:39:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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 42 [2021-08-27 06:39:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:50,733 INFO L225 Difference]: With dead ends: 229 [2021-08-27 06:39:50,733 INFO L226 Difference]: Without dead ends: 229 [2021-08-27 06:39:50,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-27 06:39:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-27 06:39:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 179. [2021-08-27 06:39:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 152 states have (on average 1.236842105263158) internal successors, (188), 175 states have internal predecessors, (188), 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 06:39:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 191 transitions. [2021-08-27 06:39:50,737 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 191 transitions. Word has length 42 [2021-08-27 06:39:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:50,737 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 191 transitions. [2021-08-27 06:39:50,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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 06:39:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 191 transitions. [2021-08-27 06:39:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 06:39:50,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:50,738 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, 1, 1, 1, 1] [2021-08-27 06:39:50,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-27 06:39:50,739 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr58ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash 546114171, now seen corresponding path program 1 times [2021-08-27 06:39:50,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:50,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971092644] [2021-08-27 06:39:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:50,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:50,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:50,951 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 06:39:50,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:50,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971092644] [2021-08-27 06:39:50,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971092644] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:50,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:50,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 06:39:50,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202086317] [2021-08-27 06:39:50,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:39:50,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:50,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:39:50,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:39:50,953 INFO L87 Difference]: Start difference. First operand 179 states and 191 transitions. Second operand has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 06:39:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:51,491 INFO L93 Difference]: Finished difference Result 228 states and 234 transitions. [2021-08-27 06:39:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 06:39:51,492 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 43 [2021-08-27 06:39:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:51,493 INFO L225 Difference]: With dead ends: 228 [2021-08-27 06:39:51,493 INFO L226 Difference]: Without dead ends: 228 [2021-08-27 06:39:51,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-27 06:39:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-08-27 06:39:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 180. [2021-08-27 06:39:51,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.2352941176470589) internal successors, (189), 176 states have internal predecessors, (189), 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 06:39:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 192 transitions. [2021-08-27 06:39:51,497 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 192 transitions. Word has length 43 [2021-08-27 06:39:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:51,498 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 192 transitions. [2021-08-27 06:39:51,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 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 06:39:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 192 transitions. [2021-08-27 06:39:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 06:39:51,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:51,499 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, 1, 1, 1, 1] [2021-08-27 06:39:51,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-27 06:39:51,499 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr45REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:51,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1871579235, now seen corresponding path program 1 times [2021-08-27 06:39:51,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:51,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887021559] [2021-08-27 06:39:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:51,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:51,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:51,758 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 06:39:51,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:51,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887021559] [2021-08-27 06:39:51,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887021559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:39:51,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792747557] [2021-08-27 06:39:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:51,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:39:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:39:51,767 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 06:39:51,771 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 06:39:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:52,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-27 06:39:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:39:52,174 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:39:52,174 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 06:39:52,226 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 06:39:52,363 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:39:52,363 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 30 treesize of output 24 [2021-08-27 06:39:52,537 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-08-27 06:39:52,537 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 53 treesize of output 48 [2021-08-27 06:39:53,104 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 06:39:53,104 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 22 [2021-08-27 06:39:53,155 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:39:53,155 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 06:39:53,193 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 06:39:53,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792747557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:39:53,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:39:53,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-08-27 06:39:53,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20335966] [2021-08-27 06:39:53,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-27 06:39:53,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:53,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-27 06:39:53,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 06:39:53,198 INFO L87 Difference]: Start difference. First operand 180 states and 192 transitions. Second operand has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 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 06:39:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:54,566 INFO L93 Difference]: Finished difference Result 230 states and 236 transitions. [2021-08-27 06:39:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 06:39:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 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 43 [2021-08-27 06:39:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:54,567 INFO L225 Difference]: With dead ends: 230 [2021-08-27 06:39:54,567 INFO L226 Difference]: Without dead ends: 230 [2021-08-27 06:39:54,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1049.6ms TimeCoverageRelationStatistics Valid=436, Invalid=2114, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 06:39:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-08-27 06:39:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 186. [2021-08-27 06:39:54,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 159 states have (on average 1.2327044025157232) internal successors, (196), 182 states have internal predecessors, (196), 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 06:39:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 199 transitions. [2021-08-27 06:39:54,572 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 199 transitions. Word has length 43 [2021-08-27 06:39:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:54,572 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 199 transitions. [2021-08-27 06:39:54,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 33 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 06:39:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 199 transitions. [2021-08-27 06:39:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 06:39:54,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:54,573 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, 1, 1, 1, 1] [2021-08-27 06:39:54,602 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 06:39:54,792 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,SelfDestructingSolverStorable24 [2021-08-27 06:39:54,793 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1871579236, now seen corresponding path program 1 times [2021-08-27 06:39:54,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:54,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983100022] [2021-08-27 06:39:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:54,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:55,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:55,120 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 06:39:55,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:55,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983100022] [2021-08-27 06:39:55,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983100022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:39:55,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084074700] [2021-08-27 06:39:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:55,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:39:55,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:39:55,125 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 06:39:55,126 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 06:39:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-27 06:39:55,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:39:55,944 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 06:39:55,945 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 45 treesize of output 40 [2021-08-27 06:39:55,952 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 06:39:55,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-08-27 06:39:56,030 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 06:39:56,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084074700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:39:56,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:39:56,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-08-27 06:39:56,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778752891] [2021-08-27 06:39:56,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 06:39:56,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:56,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 06:39:56,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-08-27 06:39:56,031 INFO L87 Difference]: Start difference. First operand 186 states and 199 transitions. Second operand has 25 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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 06:39:57,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:57,790 INFO L93 Difference]: Finished difference Result 276 states and 282 transitions. [2021-08-27 06:39:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 06:39:57,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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 43 [2021-08-27 06:39:57,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:57,792 INFO L225 Difference]: With dead ends: 276 [2021-08-27 06:39:57,792 INFO L226 Difference]: Without dead ends: 276 [2021-08-27 06:39:57,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1276.0ms TimeCoverageRelationStatistics Valid=563, Invalid=2193, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 06:39:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-08-27 06:39:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 208. [2021-08-27 06:39:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 184 states have (on average 1.2282608695652173) internal successors, (226), 204 states have internal predecessors, (226), 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 06:39:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2021-08-27 06:39:57,797 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 43 [2021-08-27 06:39:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:57,797 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2021-08-27 06:39:57,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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 06:39:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2021-08-27 06:39:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 06:39:57,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:57,798 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, 1, 1, 1, 1, 1] [2021-08-27 06:39:57,824 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 06:39:58,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:39:58,022 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr59ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash -250329606, now seen corresponding path program 1 times [2021-08-27 06:39:58,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:58,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175860834] [2021-08-27 06:39:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:58,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:58,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:58,114 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 06:39:58,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:58,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175860834] [2021-08-27 06:39:58,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175860834] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:39:58,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:39:58,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 06:39:58,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23020019] [2021-08-27 06:39:58,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 06:39:58,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:39:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 06:39:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:39:58,117 INFO L87 Difference]: Start difference. First operand 208 states and 229 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 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 06:39:58,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:39:58,483 INFO L93 Difference]: Finished difference Result 231 states and 244 transitions. [2021-08-27 06:39:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:39:58,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 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 06:39:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:39:58,485 INFO L225 Difference]: With dead ends: 231 [2021-08-27 06:39:58,485 INFO L226 Difference]: Without dead ends: 231 [2021-08-27 06:39:58,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-27 06:39:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-27 06:39:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2021-08-27 06:39:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 191 states have (on average 1.2303664921465969) internal successors, (235), 211 states have internal predecessors, (235), 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 06:39:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 238 transitions. [2021-08-27 06:39:58,490 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 238 transitions. Word has length 44 [2021-08-27 06:39:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:39:58,490 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 238 transitions. [2021-08-27 06:39:58,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 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 06:39:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 238 transitions. [2021-08-27 06:39:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 06:39:58,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:39:58,492 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] [2021-08-27 06:39:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-27 06:39:58,492 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:39:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:39:58,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2073434312, now seen corresponding path program 1 times [2021-08-27 06:39:58,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:39:58,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728482708] [2021-08-27 06:39:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:58,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:39:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:58,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:39:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:58,858 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 06:39:58,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:39:58,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728482708] [2021-08-27 06:39:58,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728482708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:39:58,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807922719] [2021-08-27 06:39:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:39:58,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:39:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:39:58,873 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 06:39:58,874 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 06:39:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:39:59,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 06:39:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:39:59,265 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 06:39:59,370 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:39:59,371 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 06:39:59,417 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 06:39:59,540 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:39:59,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-08-27 06:39:59,739 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:39:59,739 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 48 treesize of output 36 [2021-08-27 06:39:59,865 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 06:39:59,891 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:39:59,891 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 06:39:59,941 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 26 [2021-08-27 06:40:00,079 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 06:40:00,079 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 2 case distinctions, treesize of input 45 treesize of output 38 [2021-08-27 06:40:00,291 INFO L354 Elim1Store]: treesize reduction 134, result has 18.3 percent of original size [2021-08-27 06:40:00,292 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 110 treesize of output 71 [2021-08-27 06:40:00,598 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-27 06:40:00,599 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 59 treesize of output 33 [2021-08-27 06:40:00,607 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 06:40:00,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807922719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:00,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:40:00,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-08-27 06:40:00,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128250860] [2021-08-27 06:40:00,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 06:40:00,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:40:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 06:40:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 06:40:00,610 INFO L87 Difference]: Start difference. First operand 215 states and 238 transitions. Second operand has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 06:40:18,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:40:18,987 INFO L93 Difference]: Finished difference Result 315 states and 342 transitions. [2021-08-27 06:40:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 06:40:18,987 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 06:40:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:40:18,989 INFO L225 Difference]: With dead ends: 315 [2021-08-27 06:40:18,990 INFO L226 Difference]: Without dead ends: 315 [2021-08-27 06:40:18,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 1253.9ms TimeCoverageRelationStatistics Valid=483, Invalid=2709, Unknown=0, NotChecked=0, Total=3192 [2021-08-27 06:40:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-27 06:40:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 221. [2021-08-27 06:40:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 197 states have (on average 1.2284263959390862) internal successors, (242), 217 states have internal predecessors, (242), 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 06:40:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2021-08-27 06:40:18,995 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 44 [2021-08-27 06:40:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:40:18,995 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2021-08-27 06:40:18,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 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 06:40:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2021-08-27 06:40:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 06:40:18,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:40:18,996 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] [2021-08-27 06:40:19,025 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 06:40:19,220 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,SelfDestructingSolverStorable27 [2021-08-27 06:40:19,220 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr43REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:40:19,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:40:19,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2073434313, now seen corresponding path program 1 times [2021-08-27 06:40:19,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:40:19,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119591642] [2021-08-27 06:40:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:40:19,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:40:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:19,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:40:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:19,689 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 06:40:19,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:40:19,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119591642] [2021-08-27 06:40:19,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119591642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:19,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482643769] [2021-08-27 06:40:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:40:19,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:40:19,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:40:19,690 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 06:40:19,691 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 06:40:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:20,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 06:40:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:40:20,082 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 06:40:20,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:40:20,200 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 06:40:20,208 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 06:40:20,270 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 06:40:20,278 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 06:40:20,458 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:40:20,458 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 67 treesize of output 49 [2021-08-27 06:40:20,469 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:40:20,470 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 59 treesize of output 54 [2021-08-27 06:40:20,811 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:40:20,811 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 96 treesize of output 76 [2021-08-27 06:40:20,833 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-08-27 06:40:20,833 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 60 [2021-08-27 06:40:21,039 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 06:40:21,045 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 06:40:21,082 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:40:21,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-08-27 06:40:21,099 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:40:21,100 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 06:40:21,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 06:40:21,179 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 32 treesize of output 31 [2021-08-27 06:40:21,378 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 06:40:21,378 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 2 case distinctions, treesize of input 82 treesize of output 63 [2021-08-27 06:40:21,392 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:40:21,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 69 [2021-08-27 06:40:21,668 INFO L354 Elim1Store]: treesize reduction 134, result has 18.3 percent of original size [2021-08-27 06:40:21,668 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 190 treesize of output 111 [2021-08-27 06:40:21,689 INFO L354 Elim1Store]: treesize reduction 122, result has 20.3 percent of original size [2021-08-27 06:40:21,689 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 153 treesize of output 122 [2021-08-27 06:40:22,044 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 06:40:22,044 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 86 treesize of output 81 [2021-08-27 06:40:22,054 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-27 06:40:22,054 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 75 treesize of output 41 [2021-08-27 06:40:22,183 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 06:40:22,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482643769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:22,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:40:22,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-08-27 06:40:22,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983654060] [2021-08-27 06:40:22,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 06:40:22,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:40:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 06:40:22,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 06:40:22,186 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 38 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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 06:40:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:40:23,957 INFO L93 Difference]: Finished difference Result 327 states and 351 transitions. [2021-08-27 06:40:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 06:40:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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 06:40:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:40:23,963 INFO L225 Difference]: With dead ends: 327 [2021-08-27 06:40:23,963 INFO L226 Difference]: Without dead ends: 327 [2021-08-27 06:40:23,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1564.3ms TimeCoverageRelationStatistics Valid=383, Invalid=2587, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 06:40:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-08-27 06:40:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 221. [2021-08-27 06:40:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 197 states have (on average 1.2233502538071066) internal successors, (241), 217 states have internal predecessors, (241), 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 06:40:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 244 transitions. [2021-08-27 06:40:23,968 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 244 transitions. Word has length 44 [2021-08-27 06:40:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:40:23,968 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 244 transitions. [2021-08-27 06:40:23,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 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 06:40:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 244 transitions. [2021-08-27 06:40:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 06:40:23,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:40:23,969 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] [2021-08-27 06:40:23,992 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 06:40:24,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 06:40:24,185 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:40:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:40:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1245278970, now seen corresponding path program 1 times [2021-08-27 06:40:24,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:40:24,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453265427] [2021-08-27 06:40:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:40:24,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:40:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:24,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:40:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:24,616 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 06:40:24,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:40:24,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453265427] [2021-08-27 06:40:24,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453265427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:24,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379832715] [2021-08-27 06:40:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:40:24,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:40:24,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:40:24,637 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 06:40:24,638 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 06:40:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 06:40:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:40:25,170 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 06:40:25,268 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:40:25,269 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 06:40:25,325 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 06:40:25,457 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:40:25,457 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 30 treesize of output 24 [2021-08-27 06:40:25,659 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:40:25,659 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 48 treesize of output 36 [2021-08-27 06:40:25,771 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-27 06:40:25,771 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 35 treesize of output 15 [2021-08-27 06:40:25,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:40:25,846 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:40:25,847 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 06:40:25,898 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 06:40:25,898 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 30 [2021-08-27 06:40:26,071 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 06:40:26,071 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 38 [2021-08-27 06:40:26,272 INFO L354 Elim1Store]: treesize reduction 134, result has 18.3 percent of original size [2021-08-27 06:40:26,272 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 110 treesize of output 71 [2021-08-27 06:40:26,569 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-27 06:40:26,569 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 59 treesize of output 33 [2021-08-27 06:40:26,578 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 06:40:26,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379832715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:26,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:40:26,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2021-08-27 06:40:26,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541352964] [2021-08-27 06:40:26,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 06:40:26,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:40:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 06:40:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 06:40:26,581 INFO L87 Difference]: Start difference. First operand 221 states and 244 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 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 06:40:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:40:45,089 INFO L93 Difference]: Finished difference Result 316 states and 343 transitions. [2021-08-27 06:40:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-27 06:40:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 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 06:40:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:40:45,091 INFO L225 Difference]: With dead ends: 316 [2021-08-27 06:40:45,091 INFO L226 Difference]: Without dead ends: 316 [2021-08-27 06:40:45,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1457.3ms TimeCoverageRelationStatistics Valid=556, Invalid=3226, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 06:40:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-08-27 06:40:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 225. [2021-08-27 06:40:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 201 states have (on average 1.2238805970149254) internal successors, (246), 221 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 06:40:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 249 transitions. [2021-08-27 06:40:45,095 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 249 transitions. Word has length 44 [2021-08-27 06:40:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:40:45,095 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 249 transitions. [2021-08-27 06:40:45,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 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 06:40:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 249 transitions. [2021-08-27 06:40:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 06:40:45,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:40:45,096 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] [2021-08-27 06:40:45,118 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 06:40:45,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:40:45,297 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:40:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:40:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1245278969, now seen corresponding path program 1 times [2021-08-27 06:40:45,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:40:45,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13865203] [2021-08-27 06:40:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:40:45,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:40:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:45,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:40:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:45,811 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 06:40:45,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:40:45,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13865203] [2021-08-27 06:40:45,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13865203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:45,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267375050] [2021-08-27 06:40:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:40:45,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:40:45,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:40:45,813 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 06:40:45,814 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 06:40:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 06:40:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:40:46,426 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 06:40:46,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:40:46,548 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 06:40:46,552 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 06:40:46,603 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 06:40:46,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 06:40:46,754 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:40:46,755 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 67 treesize of output 49 [2021-08-27 06:40:46,771 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:40:46,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-08-27 06:40:47,093 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:40:47,094 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 96 treesize of output 76 [2021-08-27 06:40:47,124 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-08-27 06:40:47,125 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 83 treesize of output 76 [2021-08-27 06:40:47,345 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-08-27 06:40:47,345 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 21 [2021-08-27 06:40:47,365 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-27 06:40:47,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 20 [2021-08-27 06:40:47,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:40:47,430 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:40:47,430 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 06:40:47,446 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 06:40:47,522 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 06:40:47,522 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 49 treesize of output 40 [2021-08-27 06:40:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:40:47,537 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 06:40:47,738 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-08-27 06:40:47,739 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 99 treesize of output 72 [2021-08-27 06:40:47,752 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:40:47,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 78 [2021-08-27 06:40:48,026 INFO L354 Elim1Store]: treesize reduction 134, result has 18.3 percent of original size [2021-08-27 06:40:48,026 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 190 treesize of output 111 [2021-08-27 06:40:48,047 INFO L354 Elim1Store]: treesize reduction 122, result has 20.3 percent of original size [2021-08-27 06:40:48,047 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 153 treesize of output 122 [2021-08-27 06:40:48,375 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-27 06:40:48,375 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 86 treesize of output 52 [2021-08-27 06:40:48,382 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 06:40:48,382 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 43 treesize of output 38 [2021-08-27 06:40:48,479 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 06:40:48,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267375050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:48,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:40:48,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 39 [2021-08-27 06:40:48,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996050365] [2021-08-27 06:40:48,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 06:40:48,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:40:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 06:40:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 06:40:48,481 INFO L87 Difference]: Start difference. First operand 225 states and 249 transitions. Second operand has 40 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 06:40:50,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:40:50,468 INFO L93 Difference]: Finished difference Result 339 states and 365 transitions. [2021-08-27 06:40:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 06:40:50,468 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 06:40:50,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:40:50,473 INFO L225 Difference]: With dead ends: 339 [2021-08-27 06:40:50,474 INFO L226 Difference]: Without dead ends: 339 [2021-08-27 06:40:50,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1708.1ms TimeCoverageRelationStatistics Valid=452, Invalid=3088, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 06:40:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-27 06:40:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 230. [2021-08-27 06:40:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 206 states have (on average 1.2184466019417475) internal successors, (251), 226 states have internal predecessors, (251), 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 06:40:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 254 transitions. [2021-08-27 06:40:50,479 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 254 transitions. Word has length 44 [2021-08-27 06:40:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:40:50,479 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 254 transitions. [2021-08-27 06:40:50,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 06:40:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 254 transitions. [2021-08-27 06:40:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-27 06:40:50,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:40:50,480 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, 1] [2021-08-27 06:40:50,508 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 06:40:50,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:40:50,697 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:40:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:40:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash -294446712, now seen corresponding path program 1 times [2021-08-27 06:40:50,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:40:50,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511064897] [2021-08-27 06:40:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:40:50,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:40:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:51,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:40:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:51,217 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 06:40:51,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:40:51,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511064897] [2021-08-27 06:40:51,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511064897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:51,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391845440] [2021-08-27 06:40:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:40:51,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:40:51,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:40:51,221 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 06:40:51,251 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 06:40:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:40:51,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 06:40:51,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:40:51,949 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 06:40:51,970 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 06:40:52,042 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:40:52,042 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 06:40:52,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:40:52,091 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 06:40:52,098 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 06:40:52,229 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:40:52,229 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 70 treesize of output 52 [2021-08-27 06:40:52,244 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-27 06:40:52,244 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 62 treesize of output 34 [2021-08-27 06:40:52,344 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:40:52,344 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 17 [2021-08-27 06:40:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:40:52,388 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 06:40:52,511 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 32 treesize of output 25 [2021-08-27 06:40:52,572 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:40:52,572 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 06:40:52,628 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-27 06:40:52,628 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-08-27 06:40:52,636 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 06:40:52,765 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:40:52,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 65 [2021-08-27 06:40:52,783 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-27 06:40:52,783 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 79 treesize of output 54 [2021-08-27 06:40:52,871 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:40:52,872 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 50 treesize of output 31 [2021-08-27 06:40:52,948 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-08-27 06:40:52,948 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 06:40:53,231 INFO L354 Elim1Store]: treesize reduction 79, result has 9.2 percent of original size [2021-08-27 06:40:53,231 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 33 [2021-08-27 06:40:53,320 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 06:40:53,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391845440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:40:53,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:40:53,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 37 [2021-08-27 06:40:53,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426773367] [2021-08-27 06:40:53,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 06:40:53,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:40:53,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 06:40:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 06:40:53,324 INFO L87 Difference]: Start difference. First operand 230 states and 254 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 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 06:41:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:00,696 INFO L93 Difference]: Finished difference Result 281 states and 303 transitions. [2021-08-27 06:41:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 06:41:00,697 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 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 46 [2021-08-27 06:41:00,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:00,697 INFO L225 Difference]: With dead ends: 281 [2021-08-27 06:41:00,697 INFO L226 Difference]: Without dead ends: 281 [2021-08-27 06:41:00,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 3364.8ms TimeCoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 06:41:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-27 06:41:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 224. [2021-08-27 06:41:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 200 states have (on average 1.22) internal successors, (244), 220 states have internal predecessors, (244), 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 06:41:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 247 transitions. [2021-08-27 06:41:00,702 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 247 transitions. Word has length 46 [2021-08-27 06:41:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:00,702 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 247 transitions. [2021-08-27 06:41:00,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 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 06:41:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 247 transitions. [2021-08-27 06:41:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 06:41:00,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:00,703 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:41:00,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 06:41:00,912 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,SelfDestructingSolverStorable31 [2021-08-27 06:41:00,913 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr62ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1505789377, now seen corresponding path program 1 times [2021-08-27 06:41:00,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:00,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311755100] [2021-08-27 06:41:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:00,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:01,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:01,132 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 06:41:01,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:01,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311755100] [2021-08-27 06:41:01,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311755100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:41:01,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:41:01,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 06:41:01,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215753721] [2021-08-27 06:41:01,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 06:41:01,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:01,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 06:41:01,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-27 06:41:01,136 INFO L87 Difference]: Start difference. First operand 224 states and 247 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 06:41:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:01,642 INFO L93 Difference]: Finished difference Result 242 states and 261 transitions. [2021-08-27 06:41:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 06:41:01,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 47 [2021-08-27 06:41:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:01,644 INFO L225 Difference]: With dead ends: 242 [2021-08-27 06:41:01,644 INFO L226 Difference]: Without dead ends: 242 [2021-08-27 06:41:01,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-08-27 06:41:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-27 06:41:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 228. [2021-08-27 06:41:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 204 states have (on average 1.2156862745098038) internal successors, (248), 224 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 06:41:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 251 transitions. [2021-08-27 06:41:01,664 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 251 transitions. Word has length 47 [2021-08-27 06:41:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:01,665 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 251 transitions. [2021-08-27 06:41:01,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 06:41:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 251 transitions. [2021-08-27 06:41:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 06:41:01,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:01,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:41:01,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-27 06:41:01,666 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr63ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash 565169855, now seen corresponding path program 1 times [2021-08-27 06:41:01,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:01,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56835121] [2021-08-27 06:41:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:01,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:02,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:02,053 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 06:41:02,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:02,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56835121] [2021-08-27 06:41:02,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56835121] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:41:02,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:41:02,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-27 06:41:02,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124548445] [2021-08-27 06:41:02,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 06:41:02,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:02,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 06:41:02,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:41:02,055 INFO L87 Difference]: Start difference. First operand 228 states and 251 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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 06:41:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:02,592 INFO L93 Difference]: Finished difference Result 232 states and 251 transitions. [2021-08-27 06:41:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 06:41:02,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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 48 [2021-08-27 06:41:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:02,595 INFO L225 Difference]: With dead ends: 232 [2021-08-27 06:41:02,595 INFO L226 Difference]: Without dead ends: 221 [2021-08-27 06:41:02,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-27 06:41:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-27 06:41:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2021-08-27 06:41:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 194 states have (on average 1.2216494845360826) internal successors, (237), 214 states have internal predecessors, (237), 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 06:41:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 240 transitions. [2021-08-27 06:41:02,599 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 240 transitions. Word has length 48 [2021-08-27 06:41:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:02,600 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 240 transitions. [2021-08-27 06:41:02,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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 06:41:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 240 transitions. [2021-08-27 06:41:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 06:41:02,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:02,601 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:41:02,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-08-27 06:41:02,601 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1926989455, now seen corresponding path program 1 times [2021-08-27 06:41:02,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:02,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693592954] [2021-08-27 06:41:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:02,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:02,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:41:02,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:02,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693592954] [2021-08-27 06:41:02,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693592954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:02,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288363776] [2021-08-27 06:41:02,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:02,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:41:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:41:02,804 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 06:41:02,807 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 06:41:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:03,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 06:41:03,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:41:03,663 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:41:03,663 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 06:41:03,706 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 19 treesize of output 15 [2021-08-27 06:41:03,833 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:41:03,833 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 37 treesize of output 27 [2021-08-27 06:41:03,964 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-08-27 06:41:03,965 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 51 [2021-08-27 06:41:04,294 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 23 treesize of output 11 [2021-08-27 06:41:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:41:04,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288363776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:04,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:41:04,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-08-27 06:41:04,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572996123] [2021-08-27 06:41:04,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 06:41:04,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:04,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 06:41:04,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-08-27 06:41:04,341 INFO L87 Difference]: Start difference. First operand 218 states and 240 transitions. Second operand has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 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 06:41:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:05,360 INFO L93 Difference]: Finished difference Result 241 states and 255 transitions. [2021-08-27 06:41:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 06:41:05,364 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 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 48 [2021-08-27 06:41:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:05,365 INFO L225 Difference]: With dead ends: 241 [2021-08-27 06:41:05,365 INFO L226 Difference]: Without dead ends: 241 [2021-08-27 06:41:05,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 799.1ms TimeCoverageRelationStatistics Valid=465, Invalid=1515, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 06:41:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-27 06:41:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2021-08-27 06:41:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 181 states have (on average 1.2154696132596685) internal successors, (220), 201 states have internal predecessors, (220), 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 06:41:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 223 transitions. [2021-08-27 06:41:05,369 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 223 transitions. Word has length 48 [2021-08-27 06:41:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:05,369 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 223 transitions. [2021-08-27 06:41:05,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 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 06:41:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 223 transitions. [2021-08-27 06:41:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 06:41:05,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:05,370 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:41:05,398 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 06:41:05,584 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,SelfDestructingSolverStorable34 [2021-08-27 06:41:05,585 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash 641103978, now seen corresponding path program 1 times [2021-08-27 06:41:05,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:05,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710680339] [2021-08-27 06:41:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:05,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:06,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:41:06,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:06,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710680339] [2021-08-27 06:41:06,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710680339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:06,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260148193] [2021-08-27 06:41:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:06,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:41:06,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:41:06,295 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 06:41:06,297 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 06:41:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:07,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-27 06:41:07,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:41:07,123 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 06:41:07,179 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 06:41:07,189 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:41:07,189 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 06:41:07,245 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 06:41:07,249 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 06:41:07,406 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:41:07,407 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 67 treesize of output 49 [2021-08-27 06:41:07,417 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:41:07,418 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 59 treesize of output 54 [2021-08-27 06:41:07,700 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:41:07,700 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 103 treesize of output 83 [2021-08-27 06:41:07,724 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-08-27 06:41:07,724 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 90 treesize of output 83 [2021-08-27 06:41:07,731 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 06:41:07,732 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 77 treesize of output 72 [2021-08-27 06:41:07,891 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 06:41:07,903 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-27 06:41:07,904 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 15 [2021-08-27 06:41:07,910 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 06:41:07,984 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:41:07,984 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 06:41:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:41:08,055 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 06:41:08,061 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 06:41:08,071 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 26 [2021-08-27 06:41:08,212 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-27 06:41:08,213 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 86 [2021-08-27 06:41:08,223 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-27 06:41:08,224 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 105 treesize of output 77 [2021-08-27 06:41:08,234 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:41:08,235 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 74 treesize of output 69 [2021-08-27 06:41:08,459 INFO L354 Elim1Store]: treesize reduction 130, result has 18.8 percent of original size [2021-08-27 06:41:08,459 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 202 treesize of output 119 [2021-08-27 06:41:08,470 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-08-27 06:41:08,471 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 165 treesize of output 156 [2021-08-27 06:41:08,492 INFO L354 Elim1Store]: treesize reduction 122, result has 20.3 percent of original size [2021-08-27 06:41:08,492 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 153 treesize of output 122 [2021-08-27 06:41:08,786 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-08-27 06:41:08,787 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 84 treesize of output 58 [2021-08-27 06:41:08,798 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 06:41:08,798 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 49 treesize of output 44 [2021-08-27 06:41:08,931 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:41:08,931 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 28 treesize of output 14 [2021-08-27 06:41:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:41:08,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260148193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:08,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:41:08,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2021-08-27 06:41:08,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465299665] [2021-08-27 06:41:08,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 06:41:08,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 06:41:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 06:41:08,945 INFO L87 Difference]: Start difference. First operand 205 states and 223 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 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 06:41:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:11,270 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2021-08-27 06:41:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 06:41:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 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 48 [2021-08-27 06:41:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:11,273 INFO L225 Difference]: With dead ends: 287 [2021-08-27 06:41:11,273 INFO L226 Difference]: Without dead ends: 287 [2021-08-27 06:41:11,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1948.8ms TimeCoverageRelationStatistics Valid=441, Invalid=3219, Unknown=0, NotChecked=0, Total=3660 [2021-08-27 06:41:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-27 06:41:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 205. [2021-08-27 06:41:11,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 201 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 06:41:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 222 transitions. [2021-08-27 06:41:11,277 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 222 transitions. Word has length 48 [2021-08-27 06:41:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:11,277 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 222 transitions. [2021-08-27 06:41:11,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 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 06:41:11,277 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 222 transitions. [2021-08-27 06:41:11,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 06:41:11,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:11,278 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, 1, 1, 1, 1] [2021-08-27 06:41:11,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-27 06:41:11,479 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,SelfDestructingSolverStorable35 [2021-08-27 06:41:11,479 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr57ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:11,479 INFO L82 PathProgramCache]: Analyzing trace with hash -435625733, now seen corresponding path program 1 times [2021-08-27 06:41:11,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:11,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888255284] [2021-08-27 06:41:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:11,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:11,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:41:11,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:11,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888255284] [2021-08-27 06:41:11,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888255284] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:41:11,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:41:11,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 06:41:11,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340837025] [2021-08-27 06:41:11,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 06:41:11,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 06:41:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:41:11,622 INFO L87 Difference]: Start difference. First operand 205 states and 222 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 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 06:41:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:11,974 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2021-08-27 06:41:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:41:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 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 49 [2021-08-27 06:41:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:11,976 INFO L225 Difference]: With dead ends: 216 [2021-08-27 06:41:11,976 INFO L226 Difference]: Without dead ends: 191 [2021-08-27 06:41:11,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:41:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-27 06:41:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 169. [2021-08-27 06:41:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 145 states have (on average 1.2413793103448276) internal successors, (180), 165 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 06:41:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2021-08-27 06:41:11,979 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 49 [2021-08-27 06:41:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:11,979 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2021-08-27 06:41:11,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 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 06:41:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2021-08-27 06:41:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 06:41:11,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:11,980 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:41:11,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-27 06:41:11,981 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1563168029, now seen corresponding path program 1 times [2021-08-27 06:41:11,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:11,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438253898] [2021-08-27 06:41:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:11,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:12,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:12,530 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 06:41:12,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:12,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438253898] [2021-08-27 06:41:12,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438253898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:12,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276155993] [2021-08-27 06:41:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:12,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:41:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:41:12,533 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 06:41:12,548 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 06:41:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:13,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 06:41:13,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:41:13,492 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 06:41:13,618 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 06:41:13,618 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 06:41:13,671 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 06:41:13,679 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 06:41:13,806 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:41:13,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 42 [2021-08-27 06:41:13,809 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 52 treesize of output 44 [2021-08-27 06:41:14,061 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:41:14,062 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 96 treesize of output 76 [2021-08-27 06:41:14,084 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-08-27 06:41:14,084 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 83 treesize of output 76 [2021-08-27 06:41:14,236 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-08-27 06:41:14,236 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 21 [2021-08-27 06:41:14,251 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-27 06:41:14,251 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 20 [2021-08-27 06:41:14,320 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-08-27 06:41:14,321 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 06:41:14,406 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-27 06:41:14,407 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 06:41:14,424 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 06:41:14,424 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 53 treesize of output 40 [2021-08-27 06:41:14,678 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-08-27 06:41:14,679 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 103 treesize of output 72 [2021-08-27 06:41:14,692 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:41:14,692 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 95 treesize of output 90 [2021-08-27 06:41:14,999 INFO L354 Elim1Store]: treesize reduction 154, result has 18.1 percent of original size [2021-08-27 06:41:14,999 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 231 treesize of output 112 [2021-08-27 06:41:15,024 INFO L354 Elim1Store]: treesize reduction 90, result has 20.4 percent of original size [2021-08-27 06:41:15,024 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 182 treesize of output 145 [2021-08-27 06:41:15,340 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 06:41:15,340 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 96 treesize of output 83 [2021-08-27 06:41:15,801 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-27 06:41:15,801 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 49 [2021-08-27 06:41:18,311 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 06:41:18,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276155993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:18,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:41:18,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2021-08-27 06:41:18,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676494997] [2021-08-27 06:41:18,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 06:41:18,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 06:41:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1590, Unknown=1, NotChecked=0, Total=1806 [2021-08-27 06:41:18,313 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 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 06:41:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:24,801 INFO L93 Difference]: Finished difference Result 222 states and 234 transitions. [2021-08-27 06:41:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 06:41:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 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 06:41:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:24,804 INFO L225 Difference]: With dead ends: 222 [2021-08-27 06:41:24,804 INFO L226 Difference]: Without dead ends: 222 [2021-08-27 06:41:24,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 6686.4ms TimeCoverageRelationStatistics Valid=507, Invalid=3151, Unknown=2, NotChecked=0, Total=3660 [2021-08-27 06:41:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-27 06:41:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 171. [2021-08-27 06:41:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 147 states have (on average 1.2448979591836735) 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 06:41:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2021-08-27 06:41:24,808 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 51 [2021-08-27 06:41:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:24,808 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2021-08-27 06:41:24,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.261904761904762) internal successors, (95), 42 states have internal predecessors, (95), 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 06:41:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2021-08-27 06:41:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 06:41:24,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:24,809 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, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:41:24,842 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 06:41:25,024 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,SelfDestructingSolverStorable37 [2021-08-27 06:41:25,025 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr43REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1563168028, now seen corresponding path program 1 times [2021-08-27 06:41:25,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:25,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673594511] [2021-08-27 06:41:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:25,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:25,565 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 06:41:25,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:25,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673594511] [2021-08-27 06:41:25,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673594511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:25,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117939507] [2021-08-27 06:41:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:25,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:41:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:41:25,566 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 06:41:25,567 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 06:41:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-27 06:41:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:41:26,627 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 06:41:26,728 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:41:26,728 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 06:41:26,773 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 06:41:26,777 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 06:41:26,903 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:41:26,904 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 51 treesize of output 37 [2021-08-27 06:41:26,906 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 43 treesize of output 35 [2021-08-27 06:41:27,159 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:41:27,159 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 87 treesize of output 71 [2021-08-27 06:41:27,183 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-08-27 06:41:27,184 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 74 treesize of output 67 [2021-08-27 06:41:27,350 INFO L354 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2021-08-27 06:41:27,351 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 21 [2021-08-27 06:41:27,366 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-27 06:41:27,367 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 15 [2021-08-27 06:41:27,424 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 06:41:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:41:27,445 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:41:27,445 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 06:41:27,522 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 06:41:27,522 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 06:41:27,537 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 06:41:27,537 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 40 treesize of output 35 [2021-08-27 06:41:27,712 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-08-27 06:41:27,712 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 97 treesize of output 74 [2021-08-27 06:41:27,730 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-08-27 06:41:27,730 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 85 treesize of output 83 [2021-08-27 06:41:27,991 INFO L354 Elim1Store]: treesize reduction 154, result has 18.1 percent of original size [2021-08-27 06:41:27,991 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 237 treesize of output 118 [2021-08-27 06:41:28,022 INFO L354 Elim1Store]: treesize reduction 178, result has 16.0 percent of original size [2021-08-27 06:41:28,022 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 188 treesize of output 153 [2021-08-27 06:41:28,841 INFO L354 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2021-08-27 06:41:28,842 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 61 [2021-08-27 06:41:28,861 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-27 06:41:28,861 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 42 [2021-08-27 06:41:28,876 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 06:41:28,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117939507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:28,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:41:28,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-08-27 06:41:28,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631879768] [2021-08-27 06:41:28,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 06:41:28,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 06:41:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 06:41:28,879 INFO L87 Difference]: Start difference. First operand 171 states and 186 transitions. Second operand has 41 states, 40 states have (on average 2.325) internal successors, (93), 40 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 06:41:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:34,004 INFO L93 Difference]: Finished difference Result 236 states and 246 transitions. [2021-08-27 06:41:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 06:41:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 40 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 51 [2021-08-27 06:41:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:34,005 INFO L225 Difference]: With dead ends: 236 [2021-08-27 06:41:34,006 INFO L226 Difference]: Without dead ends: 236 [2021-08-27 06:41:34,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1832.5ms TimeCoverageRelationStatistics Valid=426, Invalid=3356, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 06:41:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-27 06:41:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2021-08-27 06:41:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 147 states have (on average 1.2380952380952381) internal successors, (182), 167 states have internal predecessors, (182), 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 06:41:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 185 transitions. [2021-08-27 06:41:34,010 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 185 transitions. Word has length 51 [2021-08-27 06:41:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:34,010 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 185 transitions. [2021-08-27 06:41:34,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 40 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 06:41:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 185 transitions. [2021-08-27 06:41:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-27 06:41:34,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:34,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:41:34,055 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 06:41:34,224 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,SelfDestructingSolverStorable38 [2021-08-27 06:41:34,225 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:34,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1034082531, now seen corresponding path program 1 times [2021-08-27 06:41:34,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:34,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852977277] [2021-08-27 06:41:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:34,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:34,853 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 06:41:34,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:34,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852977277] [2021-08-27 06:41:34,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852977277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:34,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313346814] [2021-08-27 06:41:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:34,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:41:34,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:41:34,858 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 06:41:34,859 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 06:41:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:36,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-27 06:41:36,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:41:36,034 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 06:41:36,097 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 06:41:36,097 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 06:41:36,155 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 06:41:36,162 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 06:41:36,303 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:41:36,303 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 60 treesize of output 42 [2021-08-27 06:41:36,306 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 52 treesize of output 44 [2021-08-27 06:41:36,573 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:41:36,573 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 96 treesize of output 76 [2021-08-27 06:41:36,609 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-08-27 06:41:36,610 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 60 [2021-08-27 06:41:36,728 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 06:41:36,733 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 06:41:36,763 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 06:41:36,779 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:41:36,779 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 06:41:36,840 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 22 treesize of output 21 [2021-08-27 06:41:36,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2021-08-27 06:41:37,031 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 06:41:37,032 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 70 [2021-08-27 06:41:37,049 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-08-27 06:41:37,049 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 81 treesize of output 79 [2021-08-27 06:41:37,322 INFO L354 Elim1Store]: treesize reduction 154, result has 18.1 percent of original size [2021-08-27 06:41:37,322 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 308 treesize of output 149 [2021-08-27 06:41:37,358 INFO L354 Elim1Store]: treesize reduction 178, result has 16.0 percent of original size [2021-08-27 06:41:37,358 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 259 treesize of output 200 [2021-08-27 06:41:37,361 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 210 treesize of output 194 [2021-08-27 06:41:37,378 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 194 treesize of output 166 [2021-08-27 06:41:38,620 INFO L354 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2021-08-27 06:41:38,620 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 135 treesize of output 79 [2021-08-27 06:41:38,635 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-27 06:41:38,636 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 52 [2021-08-27 06:41:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 06:41:38,720 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 06:41:38,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313346814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:38,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:41:38,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 41 [2021-08-27 06:41:38,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682673929] [2021-08-27 06:41:38,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 06:41:38,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 06:41:38,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1496, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 06:41:38,722 INFO L87 Difference]: Start difference. First operand 171 states and 185 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 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 06:41:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:41:43,354 INFO L93 Difference]: Finished difference Result 234 states and 244 transitions. [2021-08-27 06:41:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-27 06:41:43,354 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 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 53 [2021-08-27 06:41:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:41:43,355 INFO L225 Difference]: With dead ends: 234 [2021-08-27 06:41:43,355 INFO L226 Difference]: Without dead ends: 234 [2021-08-27 06:41:43,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 2390.4ms TimeCoverageRelationStatistics Valid=391, Invalid=3515, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 06:41:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-08-27 06:41:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 172. [2021-08-27 06:41:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 148 states have (on average 1.2364864864864864) internal successors, (183), 168 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 06:41:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2021-08-27 06:41:43,359 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 53 [2021-08-27 06:41:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:41:43,359 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2021-08-27 06:41:43,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 states have internal predecessors, (88), 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 06:41:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2021-08-27 06:41:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-27 06:41:43,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:41:43,360 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, 1] [2021-08-27 06:41:43,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 06:41:43,585 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,SelfDestructingSolverStorable39 [2021-08-27 06:41:43,585 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:41:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:41:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash -768484716, now seen corresponding path program 2 times [2021-08-27 06:41:43,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:41:43,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431130827] [2021-08-27 06:41:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:41:43,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:41:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:44,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:41:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:41:44,682 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 06:41:44,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:41:44,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431130827] [2021-08-27 06:41:44,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431130827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:44,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693169724] [2021-08-27 06:41:44,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:41:44,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:41:44,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:41:44,683 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 06:41:44,684 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 06:41:46,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:41:46,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:41:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-27 06:41:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:41:46,089 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 06:41:46,127 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 06:41:46,231 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 06:41:46,232 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 06:41:46,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:41:46,291 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 06:41:46,297 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 06:41:46,456 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:41:46,456 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 79 treesize of output 57 [2021-08-27 06:41:46,467 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-27 06:41:46,467 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 71 treesize of output 43 [2021-08-27 06:41:46,565 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:41:46,565 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 41 treesize of output 22 [2021-08-27 06:41:46,657 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 06:41:46,792 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 06:41:46,792 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 06:41:46,875 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-08-27 06:41:46,876 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 06:41:46,884 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 25 treesize of output 21 [2021-08-27 06:41:47,082 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:41:47,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 70 [2021-08-27 06:41:47,100 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-27 06:41:47,100 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 88 treesize of output 63 [2021-08-27 06:41:47,222 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:41:47,223 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 64 treesize of output 41 [2021-08-27 06:41:47,395 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-08-27 06:41:47,395 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 45 treesize of output 47 [2021-08-27 06:41:47,662 INFO L354 Elim1Store]: treesize reduction 67, result has 11.8 percent of original size [2021-08-27 06:41:47,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2021-08-27 06:41:47,804 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-08-27 06:41:47,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 42 [2021-08-27 06:41:47,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2021-08-27 06:41:47,940 INFO L354 Elim1Store]: treesize reduction 92, result has 17.1 percent of original size [2021-08-27 06:41:47,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 75 treesize of output 69 [2021-08-27 06:41:48,202 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:41:48,203 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 86 [2021-08-27 06:41:48,231 INFO L354 Elim1Store]: treesize reduction 188, result has 13.0 percent of original size [2021-08-27 06:41:48,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 82 [2021-08-27 06:41:48,390 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:41:48,390 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 75 treesize of output 52 [2021-08-27 06:41:48,553 INFO L354 Elim1Store]: treesize reduction 150, result has 15.7 percent of original size [2021-08-27 06:41:48,553 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 65 treesize of output 70 [2021-08-27 06:41:49,188 INFO L354 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2021-08-27 06:41:49,188 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 40 [2021-08-27 06:41:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:41:49,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693169724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:41:49,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:41:49,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2021-08-27 06:41:49,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120130977] [2021-08-27 06:41:49,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 06:41:49,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:41:49,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 06:41:49,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 06:41:49,196 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 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 06:44:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:44:09,960 INFO L93 Difference]: Finished difference Result 256 states and 265 transitions. [2021-08-27 06:44:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-27 06:44:09,961 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 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 53 [2021-08-27 06:44:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:44:09,962 INFO L225 Difference]: With dead ends: 256 [2021-08-27 06:44:09,962 INFO L226 Difference]: Without dead ends: 256 [2021-08-27 06:44:09,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3163 ImplicationChecksByTransitivity, 116576.6ms TimeCoverageRelationStatistics Valid=1381, Invalid=8867, Unknown=54, NotChecked=0, Total=10302 [2021-08-27 06:44:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-27 06:44:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 172. [2021-08-27 06:44:09,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 148 states have (on average 1.2297297297297298) internal successors, (182), 168 states have internal predecessors, (182), 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 06:44:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 185 transitions. [2021-08-27 06:44:09,966 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 185 transitions. Word has length 53 [2021-08-27 06:44:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:44:09,967 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 185 transitions. [2021-08-27 06:44:09,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 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 06:44:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 185 transitions. [2021-08-27 06:44:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 06:44:09,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:44:09,968 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, 1, 1, 1, 1] [2021-08-27 06:44:09,995 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 06:44:10,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:44:10,169 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:44:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:44:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1570269305, now seen corresponding path program 2 times [2021-08-27 06:44:10,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:44:10,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86401054] [2021-08-27 06:44:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:44:10,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:44:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:44:10,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:44:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:44:10,858 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 06:44:10,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:44:10,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86401054] [2021-08-27 06:44:10,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86401054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:44:10,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52431054] [2021-08-27 06:44:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:44:10,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:44:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:44:10,868 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 06:44:10,869 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 06:44:12,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:44:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:44:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-27 06:44:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:44:12,422 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 06:44:12,425 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 06:44:12,569 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:44:12,570 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 06:44:12,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-08-27 06:44:12,627 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 06:44:12,784 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:44:12,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-08-27 06:44:13,034 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:44:13,034 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 57 treesize of output 41 [2021-08-27 06:44:13,161 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:44:13,161 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 06:44:13,179 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:44:13,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 22 [2021-08-27 06:44:13,240 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 28 treesize of output 27 [2021-08-27 06:44:13,426 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-08-27 06:44:13,427 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 85 treesize of output 53 [2021-08-27 06:44:13,640 INFO L354 Elim1Store]: treesize reduction 118, result has 31.4 percent of original size [2021-08-27 06:44:13,641 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 92 treesize of output 86 [2021-08-27 06:44:15,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 06:44:15,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-27 06:44:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-08-27 06:44:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138040323] [2021-08-27 06:44:15,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 06:44:15,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:44:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 06:44:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 06:44:15,054 INFO L87 Difference]: Start difference. First operand 172 states and 185 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 06:44:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:44:16,517 INFO L93 Difference]: Finished difference Result 277 states and 294 transitions. [2021-08-27 06:44:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 06:44:16,518 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 56 [2021-08-27 06:44:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:44:16,519 INFO L225 Difference]: With dead ends: 277 [2021-08-27 06:44:16,519 INFO L226 Difference]: Without dead ends: 277 [2021-08-27 06:44:16,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1708.8ms TimeCoverageRelationStatistics Valid=547, Invalid=3875, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 06:44:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-08-27 06:44:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 204. [2021-08-27 06:44:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 180 states have (on average 1.2055555555555555) internal successors, (217), 200 states have internal predecessors, (217), 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 06:44:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 220 transitions. [2021-08-27 06:44:16,523 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 220 transitions. Word has length 56 [2021-08-27 06:44:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:44:16,523 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 220 transitions. [2021-08-27 06:44:16,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 06:44:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 220 transitions. [2021-08-27 06:44:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 06:44:16,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:44:16,524 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, 1, 1, 1, 1] [2021-08-27 06:44:16,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-27 06:44:16,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:44:16,751 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr43REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:44:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:44:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1570269306, now seen corresponding path program 2 times [2021-08-27 06:44:16,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:44:16,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578758718] [2021-08-27 06:44:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:44:16,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:44:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:44:17,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:44:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:44:17,532 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 06:44:17,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:44:17,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578758718] [2021-08-27 06:44:17,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578758718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:44:17,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740744702] [2021-08-27 06:44:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:44:17,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:44:17,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:44:17,534 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 06:44:17,534 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 06:44:19,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:44:19,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:44:19,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-27 06:44:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:44:19,143 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 06:44:19,146 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 06:44:19,286 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 06:44:19,286 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 06:44:19,304 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 06:44:19,304 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 06:44:19,375 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 06:44:19,387 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 06:44:19,580 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:44:19,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 54 [2021-08-27 06:44:19,591 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:44:19,591 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 68 treesize of output 63 [2021-08-27 06:44:19,918 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:44:19,918 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 105 treesize of output 81 [2021-08-27 06:44:19,941 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-08-27 06:44:19,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 65 [2021-08-27 06:44:20,131 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-08-27 06:44:20,131 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 24 treesize of output 27 [2021-08-27 06:44:20,154 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-27 06:44:20,155 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 06:44:20,235 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 06:44:20,244 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 32 treesize of output 31 [2021-08-27 06:44:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 06:44:20,498 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-08-27 06:44:20,499 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 82 treesize of output 63 [2021-08-27 06:44:20,513 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:44:20,513 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 74 treesize of output 69 [2021-08-27 06:44:20,919 INFO L354 Elim1Store]: treesize reduction 142, result has 17.4 percent of original size [2021-08-27 06:44:20,919 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 168 treesize of output 110 [2021-08-27 06:44:20,945 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-08-27 06:44:20,946 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 124 treesize of output 105 [2021-08-27 06:44:21,248 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-08-27 06:44:21,248 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 2 case distinctions, treesize of input 71 treesize of output 45 [2021-08-27 06:44:21,280 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 27 treesize of output 11 [2021-08-27 06:44:21,399 INFO L354 Elim1Store]: treesize reduction 66, result has 23.3 percent of original size [2021-08-27 06:44:21,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 58 [2021-08-27 06:44:21,431 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-08-27 06:44:21,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-08-27 06:44:21,554 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 06:44:21,569 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:44:21,569 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 2 case distinctions, treesize of input 71 treesize of output 60 [2021-08-27 06:44:21,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 06:44:21,967 INFO L354 Elim1Store]: treesize reduction 106, result has 23.2 percent of original size [2021-08-27 06:44:21,968 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 120 treesize of output 105 [2021-08-27 06:44:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 06:44:21,990 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-27 06:44:21,990 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 117 treesize of output 115 [2021-08-27 06:44:23,385 INFO L354 Elim1Store]: treesize reduction 206, result has 15.2 percent of original size [2021-08-27 06:44:23,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 316 treesize of output 195 [2021-08-27 06:44:23,420 INFO L354 Elim1Store]: treesize reduction 142, result has 19.3 percent of original size [2021-08-27 06:44:23,421 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 235 treesize of output 178 [2021-08-27 06:44:23,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 218 [2021-08-27 06:44:25,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 06:44:25,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 168 [2021-08-27 06:44:32,183 INFO L354 Elim1Store]: treesize reduction 97, result has 14.2 percent of original size [2021-08-27 06:44:32,183 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 187 treesize of output 124 [2021-08-27 06:44:32,202 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-27 06:44:32,202 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 102 treesize of output 89 [2021-08-27 06:44:32,837 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 06:44:32,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740744702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:44:32,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:44:32,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 54 [2021-08-27 06:44:32,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039916692] [2021-08-27 06:44:32,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-27 06:44:32,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:44:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-27 06:44:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2716, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 06:44:32,839 INFO L87 Difference]: Start difference. First operand 204 states and 220 transitions. Second operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 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 06:45:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:45:21,202 INFO L93 Difference]: Finished difference Result 368 states and 379 transitions. [2021-08-27 06:45:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-27 06:45:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 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 56 [2021-08-27 06:45:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:45:21,204 INFO L225 Difference]: With dead ends: 368 [2021-08-27 06:45:21,204 INFO L226 Difference]: Without dead ends: 368 [2021-08-27 06:45:21,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 19474.0ms TimeCoverageRelationStatistics Valid=956, Invalid=7964, Unknown=10, NotChecked=0, Total=8930 [2021-08-27 06:45:21,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-08-27 06:45:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 204. [2021-08-27 06:45:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 180 states have (on average 1.2) internal successors, (216), 200 states have internal predecessors, (216), 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 06:45:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 219 transitions. [2021-08-27 06:45:21,209 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 219 transitions. Word has length 56 [2021-08-27 06:45:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:45:21,209 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 219 transitions. [2021-08-27 06:45:21,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 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 06:45:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 219 transitions. [2021-08-27 06:45:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 06:45:21,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:45:21,210 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, 1, 1, 1, 1] [2021-08-27 06:45:21,239 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 06:45:21,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:45:21,429 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:45:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:45:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1748443977, now seen corresponding path program 2 times [2021-08-27 06:45:21,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:45:21,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066312387] [2021-08-27 06:45:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:45:21,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:45:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:45:22,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:45:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:45:22,179 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 06:45:22,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:45:22,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066312387] [2021-08-27 06:45:22,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066312387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:45:22,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744004881] [2021-08-27 06:45:22,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:45:22,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:45:22,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:45:22,181 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 06:45:22,181 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 06:45:24,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:45:24,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:45:24,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-27 06:45:24,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:45:24,105 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 06:45:24,219 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 06:45:24,220 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 06:45:24,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 06:45:24,415 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:45:24,415 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 39 treesize of output 29 [2021-08-27 06:45:24,660 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:45:24,660 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 57 treesize of output 41 [2021-08-27 06:45:24,786 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-08-27 06:45:24,787 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 06:45:24,867 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-08-27 06:45:24,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 40 [2021-08-27 06:45:25,046 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 06:45:25,047 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 2 case distinctions, treesize of input 54 treesize of output 43 [2021-08-27 06:45:25,373 INFO L354 Elim1Store]: treesize reduction 142, result has 17.4 percent of original size [2021-08-27 06:45:25,374 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 110 treesize of output 64 [2021-08-27 06:45:25,587 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-08-27 06:45:25,588 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 89 treesize of output 43 [2021-08-27 06:45:25,689 INFO L354 Elim1Store]: treesize reduction 126, result has 29.2 percent of original size [2021-08-27 06:45:25,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 108 [2021-08-27 06:45:25,806 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-08-27 06:45:25,806 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 110 treesize of output 67 [2021-08-27 06:45:26,094 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-27 06:45:26,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 70 [2021-08-27 06:45:26,437 INFO L354 Elim1Store]: treesize reduction 206, result has 15.2 percent of original size [2021-08-27 06:45:26,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 103 [2021-08-27 06:45:27,030 INFO L354 Elim1Store]: treesize reduction 66, result has 4.3 percent of original size [2021-08-27 06:45:27,030 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 63 [2021-08-27 06:45:29,658 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 06:45:29,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744004881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:45:29,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:45:29,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 53 [2021-08-27 06:45:29,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730099269] [2021-08-27 06:45:29,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-27 06:45:29,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:45:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-27 06:45:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2496, Unknown=1, NotChecked=0, Total=2862 [2021-08-27 06:45:29,660 INFO L87 Difference]: Start difference. First operand 204 states and 219 transitions. Second operand has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 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 06:46:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:01,473 INFO L93 Difference]: Finished difference Result 312 states and 331 transitions. [2021-08-27 06:46:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-27 06:46:01,473 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 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 56 [2021-08-27 06:46:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:01,474 INFO L225 Difference]: With dead ends: 312 [2021-08-27 06:46:01,474 INFO L226 Difference]: Without dead ends: 312 [2021-08-27 06:46:01,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 15270.8ms TimeCoverageRelationStatistics Valid=1080, Invalid=6221, Unknown=9, NotChecked=0, Total=7310 [2021-08-27 06:46:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-08-27 06:46:01,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 210. [2021-08-27 06:46:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 186 states have (on average 1.1989247311827957) internal successors, (223), 206 states have internal predecessors, (223), 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 06:46:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 226 transitions. [2021-08-27 06:46:01,479 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 226 transitions. Word has length 56 [2021-08-27 06:46:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:01,479 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 226 transitions. [2021-08-27 06:46:01,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 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 06:46:01,479 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 226 transitions. [2021-08-27 06:46:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 06:46:01,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:01,480 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, 1, 1, 1, 1] [2021-08-27 06:46:01,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-27 06:46:01,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:46:01,693 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:01,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1748443976, now seen corresponding path program 2 times [2021-08-27 06:46:01,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:46:01,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313143525] [2021-08-27 06:46:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:01,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:46:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:02,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:46:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:02,484 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 06:46:02,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:46:02,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313143525] [2021-08-27 06:46:02,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313143525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:46:02,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893488679] [2021-08-27 06:46:02,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:46:02,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:46:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:46:02,485 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 06:46:02,486 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 06:46:04,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:46:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:46:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 76 conjunts are in the unsatisfiable core [2021-08-27 06:46:04,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:04,519 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 06:46:04,638 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 06:46:04,638 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 06:46:04,700 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 06:46:04,709 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 06:46:04,874 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:46:04,874 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 67 treesize of output 49 [2021-08-27 06:46:04,885 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:46:04,885 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 59 treesize of output 54 [2021-08-27 06:46:05,205 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-08-27 06:46:05,205 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 96 treesize of output 76 [2021-08-27 06:46:05,227 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-08-27 06:46:05,227 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 60 [2021-08-27 06:46:05,379 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 06:46:05,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-08-27 06:46:05,419 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 06:46:05,419 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 06:46:05,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2021-08-27 06:46:05,532 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 06:46:05,803 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-08-27 06:46:05,804 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 2 case distinctions, treesize of input 91 treesize of output 68 [2021-08-27 06:46:05,814 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:46:05,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 78 [2021-08-27 06:46:06,271 INFO L354 Elim1Store]: treesize reduction 142, result has 17.4 percent of original size [2021-08-27 06:46:06,271 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 180 treesize of output 114 [2021-08-27 06:46:06,293 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-08-27 06:46:06,293 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 128 treesize of output 109 [2021-08-27 06:46:06,603 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 06:46:06,617 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-08-27 06:46:06,617 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 2 case distinctions, treesize of input 70 treesize of output 44 [2021-08-27 06:46:06,675 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-27 06:46:06,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2021-08-27 06:46:06,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-08-27 06:46:06,792 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 06:46:06,805 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:46:06,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 63 [2021-08-27 06:46:07,104 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-08-27 06:46:07,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 95 [2021-08-27 06:46:07,115 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:46:07,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 115 [2021-08-27 06:46:09,202 INFO L354 Elim1Store]: treesize reduction 206, result has 15.2 percent of original size [2021-08-27 06:46:09,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 308 treesize of output 143 [2021-08-27 06:46:09,233 INFO L354 Elim1Store]: treesize reduction 146, result has 19.3 percent of original size [2021-08-27 06:46:09,233 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 259 treesize of output 216 [2021-08-27 06:46:10,919 INFO L354 Elim1Store]: treesize reduction 66, result has 4.3 percent of original size [2021-08-27 06:46:10,919 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 77 [2021-08-27 06:46:10,927 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-27 06:46:10,928 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 60 treesize of output 55 [2021-08-27 06:46:11,106 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 06:46:11,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893488679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:46:11,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:46:11,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 53 [2021-08-27 06:46:11,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337564336] [2021-08-27 06:46:11,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-27 06:46:11,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:46:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-27 06:46:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2646, Unknown=3, NotChecked=0, Total=2862 [2021-08-27 06:46:11,108 INFO L87 Difference]: Start difference. First operand 210 states and 226 transitions. Second operand has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 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 06:46:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:26,278 INFO L93 Difference]: Finished difference Result 364 states and 381 transitions. [2021-08-27 06:46:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-27 06:46:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 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 56 [2021-08-27 06:46:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:26,279 INFO L225 Difference]: With dead ends: 364 [2021-08-27 06:46:26,279 INFO L226 Difference]: Without dead ends: 364 [2021-08-27 06:46:26,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 12871.9ms TimeCoverageRelationStatistics Valid=1072, Invalid=9634, Unknown=6, NotChecked=0, Total=10712 [2021-08-27 06:46:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-27 06:46:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 217. [2021-08-27 06:46:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 193 states have (on average 1.1968911917098446) internal successors, (231), 213 states have internal predecessors, (231), 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 06:46:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 234 transitions. [2021-08-27 06:46:26,284 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 234 transitions. Word has length 56 [2021-08-27 06:46:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:26,284 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 234 transitions. [2021-08-27 06:46:26,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 53 states have internal predecessors, (105), 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 06:46:26,285 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 234 transitions. [2021-08-27 06:46:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 06:46:26,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:26,285 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, 1, 1, 1, 1, 1, 1] [2021-08-27 06:46:26,318 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 06:46:26,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:46:26,501 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:26,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1495286009, now seen corresponding path program 2 times [2021-08-27 06:46:26,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:46:26,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943041188] [2021-08-27 06:46:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:26,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:46:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:27,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:46:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 06:46:27,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:46:27,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943041188] [2021-08-27 06:46:27,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943041188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:46:27,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194965445] [2021-08-27 06:46:27,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 06:46:27,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:46:27,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:46:27,185 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 06:46:27,203 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 06:46:29,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 06:46:29,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 06:46:29,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-27 06:46:29,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:29,525 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 06:46:29,545 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 06:46:29,635 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 06:46:29,636 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 06:46:29,692 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 06:46:29,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:46:29,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 06:46:29,856 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:46:29,856 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 79 treesize of output 57 [2021-08-27 06:46:29,867 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-27 06:46:29,867 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 71 treesize of output 43 [2021-08-27 06:46:29,965 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:46:29,965 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 41 treesize of output 22 [2021-08-27 06:46:30,070 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 06:46:30,218 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-08-27 06:46:30,218 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 06:46:30,290 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 25 treesize of output 21 [2021-08-27 06:46:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:46:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 06:46:30,482 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:46:30,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 70 [2021-08-27 06:46:30,501 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-08-27 06:46:30,501 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 88 treesize of output 63 [2021-08-27 06:46:30,633 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:46:30,634 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 64 treesize of output 41 [2021-08-27 06:46:30,805 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-08-27 06:46:30,806 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 45 treesize of output 47 [2021-08-27 06:46:31,069 INFO L354 Elim1Store]: treesize reduction 67, result has 11.8 percent of original size [2021-08-27 06:46:31,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2021-08-27 06:46:31,173 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-08-27 06:46:31,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 42 [2021-08-27 06:46:31,263 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 74 treesize of output 70 [2021-08-27 06:46:31,282 INFO L354 Elim1Store]: treesize reduction 92, result has 17.1 percent of original size [2021-08-27 06:46:31,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 75 treesize of output 69 [2021-08-27 06:46:31,540 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:46:31,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 86 [2021-08-27 06:46:31,569 INFO L354 Elim1Store]: treesize reduction 188, result has 13.0 percent of original size [2021-08-27 06:46:31,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 82 [2021-08-27 06:46:31,718 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:46:31,719 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 75 treesize of output 52 [2021-08-27 06:46:31,864 INFO L354 Elim1Store]: treesize reduction 150, result has 15.7 percent of original size [2021-08-27 06:46:31,865 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 65 treesize of output 70 [2021-08-27 06:46:32,319 INFO L354 Elim1Store]: treesize reduction 141, result has 5.4 percent of original size [2021-08-27 06:46:32,319 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 48 [2021-08-27 06:46:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:46:32,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194965445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:46:32,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:46:32,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 50 [2021-08-27 06:46:32,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370727842] [2021-08-27 06:46:32,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-27 06:46:32,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:46:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-27 06:46:32,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2099, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 06:46:32,438 INFO L87 Difference]: Start difference. First operand 217 states and 234 transitions. Second operand has 50 states, 50 states have (on average 1.96) internal successors, (98), 49 states have internal predecessors, (98), 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 06:46:36,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-08-27 06:46:36,073 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-27 06:46:36,098 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 06:46:36,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:46:36,275 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:310) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:154) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:881) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:152) ... 35 more [2021-08-27 06:46:36,280 INFO L168 Benchmark]: Toolchain (without parser) took 429626.72 ms. Allocated memory was 50.3 MB in the beginning and 423.6 MB in the end (delta: 373.3 MB). Free memory was 26.2 MB in the beginning and 269.1 MB in the end (delta: -242.9 MB). Peak memory consumption was 130.3 MB. Max. memory is 16.1 GB. [2021-08-27 06:46:36,280 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 50.3 MB. Free memory was 32.6 MB in the beginning and 32.6 MB in the end (delta: 33.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:46:36,284 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.15 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.1 MB in the beginning and 37.5 MB in the end (delta: -11.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-08-27 06:46:36,284 INFO L168 Benchmark]: Boogie Preprocessor took 52.54 ms. Allocated memory is still 60.8 MB. Free memory was 37.5 MB in the beginning and 34.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:46:36,284 INFO L168 Benchmark]: RCFGBuilder took 646.92 ms. Allocated memory is still 60.8 MB. Free memory was 34.6 MB in the beginning and 32.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. [2021-08-27 06:46:36,285 INFO L168 Benchmark]: TraceAbstraction took 428457.20 ms. Allocated memory was 60.8 MB in the beginning and 423.6 MB in the end (delta: 362.8 MB). Free memory was 31.6 MB in the beginning and 269.1 MB in the end (delta: -237.5 MB). Peak memory consumption was 125.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:46:36,286 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 50.3 MB. Free memory was 32.6 MB in the beginning and 32.6 MB in the end (delta: 33.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 464.15 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.1 MB in the beginning and 37.5 MB in the end (delta: -11.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.54 ms. Allocated memory is still 60.8 MB. Free memory was 37.5 MB in the beginning and 34.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 646.92 ms. Allocated memory is still 60.8 MB. Free memory was 34.6 MB in the beginning and 32.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 428457.20 ms. Allocated memory was 60.8 MB in the beginning and 423.6 MB in the end (delta: 362.8 MB). Free memory was 31.6 MB in the beginning and 269.1 MB in the end (delta: -237.5 MB). Peak memory consumption was 125.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:310) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:46:37,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:46:37,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:46:37,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:46:37,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:46:37,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:46:37,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:46:37,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:46:37,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:46:37,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:46:37,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:46:37,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:46:37,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:46:37,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:46:37,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:46:37,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:46:37,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:46:37,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:46:37,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:46:37,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:46:37,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:46:37,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:46:37,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:46:37,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:46:37,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:46:37,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:46:37,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:46:37,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:46:37,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:46:37,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:46:37,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:46:38,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:46:38,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:46:38,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:46:38,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:46:38,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:46:38,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:46:38,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:46:38,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:46:38,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:46:38,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:46:38,007 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-27 06:46:38,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:46:38,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:46:38,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:46:38,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:46:38,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:46:38,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:46:38,032 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:46:38,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:46:38,032 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:46:38,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:46:38,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:46:38,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:46:38,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:46:38,033 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:46:38,034 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:46:38,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:46:38,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:46:38,034 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:46:38,034 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 06:46:38,035 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 06:46:38,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:46:38,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:46:38,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:46:38,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:46:38,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:46:38,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:46:38,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:46:38,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:46:38,037 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 06:46:38,037 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 06:46:38,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:46:38,037 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 06:46:38,037 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3737fc0f3aa6913a8d0947b211150a1d468e303 [2021-08-27 06:46:38,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:46:38,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:46:38,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:46:38,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:46:38,390 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:46:38,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-token-1.i [2021-08-27 06:46:38,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1434c0857/81b7c192a8cf4cf1b7f0818242657629/FLAG8c24c1448 [2021-08-27 06:46:38,887 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:46:38,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-1.i [2021-08-27 06:46:38,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1434c0857/81b7c192a8cf4cf1b7f0818242657629/FLAG8c24c1448 [2021-08-27 06:46:39,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1434c0857/81b7c192a8cf4cf1b7f0818242657629 [2021-08-27 06:46:39,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:46:39,248 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:46:39,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:46:39,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:46:39,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:46:39,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,256 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 06:46:39, skipping insertion in model container [2021-08-27 06:46:39,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:46:39,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:46:39,537 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/dll-token-1.i[22229,22242] [2021-08-27 06:46:39,551 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/dll-token-1.i[22398,22411] [2021-08-27 06:46:39,554 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/dll-token-1.i[22489,22502] [2021-08-27 06:46:39,557 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/dll-token-1.i[22571,22584] [2021-08-27 06:46:39,560 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/dll-token-1.i[22649,22662] [2021-08-27 06:46:39,565 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/dll-token-1.i[22795,22808] [2021-08-27 06:46:39,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:46:39,590 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:46:39,642 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/dll-token-1.i[22229,22242] [2021-08-27 06:46:39,651 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/dll-token-1.i[22398,22411] [2021-08-27 06:46:39,653 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/dll-token-1.i[22489,22502] [2021-08-27 06:46:39,654 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/dll-token-1.i[22571,22584] [2021-08-27 06:46:39,656 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/dll-token-1.i[22649,22662] [2021-08-27 06:46:39,662 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/dll-token-1.i[22795,22808] [2021-08-27 06:46:39,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:46:39,698 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:46:39,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39 WrapperNode [2021-08-27 06:46:39,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:46:39,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:46:39,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:46:39,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:46:39,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:46:39,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:46:39,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:46:39,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:46:39,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (1/1) ... [2021-08-27 06:46:39,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:46:39,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:46:39,834 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 06:46:39,849 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 06:46:39,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:46:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:46:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 06:46:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 06:46:39,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:46:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 06:46:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 06:46:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 06:46:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 06:46:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 06:46:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 06:46:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 06:46:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 06:46:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 06:46:39,881 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 06:46:39,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 06:46:39,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 06:46:39,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 06:46:39,882 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 06:46:39,882 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 06:46:39,882 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 06:46:39,882 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 06:46:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 06:46:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 06:46:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 06:46:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 06:46:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 06:46:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 06:46:39,883 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 06:46:39,884 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 06:46:39,884 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 06:46:39,884 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 06:46:39,884 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 06:46:39,884 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 06:46:39,885 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 06:46:39,885 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 06:46:39,886 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 06:46:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 06:46:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 06:46:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 06:46:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 06:46:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 06:46:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 06:46:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 06:46:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 06:46:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 06:46:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 06:46:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 06:46:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 06:46:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 06:46:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 06:46:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 06:46:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 06:46:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 06:46:39,905 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 06:46:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 06:46:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 06:46:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 06:46:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 06:46:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 06:46:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 06:46:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 06:46:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 06:46:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 06:46:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 06:46:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 06:46:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 06:46:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 06:46:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 06:46:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 06:46:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 06:46:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 06:46:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 06:46:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 06:46:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 06:46:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 06:46:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 06:46:39,910 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 06:46:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 06:46:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 06:46:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 06:46:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 06:46:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 06:46:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 06:46:39,911 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 06:46:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 06:46:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 06:46:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 06:46:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 06:46:39,912 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 06:46:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 06:46:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 06:46:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 06:46:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 06:46:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 06:46:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 06:46:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 06:46:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 06:46:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 06:46:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 06:46:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 06:46:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 06:46:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 06:46:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 06:46:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 06:46:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 06:46:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 06:46:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 06:46:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 06:46:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 06:46:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 06:46:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 06:46:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 06:46:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:46:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:46:39,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 06:46:39,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 06:46:39,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-27 06:46:39,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 06:46:39,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-27 06:46:39,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:46:39,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:46:39,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 06:46:39,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:46:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 06:46:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 06:46:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 06:46:40,855 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:46:40,855 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-08-27 06:46:40,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:46:40 BoogieIcfgContainer [2021-08-27 06:46:40,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:46:40,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:46:40,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:46:40,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:46:40,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:46:39" (1/3) ... [2021-08-27 06:46:40,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2baee4f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:46:40, skipping insertion in model container [2021-08-27 06:46:40,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:46:39" (2/3) ... [2021-08-27 06:46:40,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2baee4f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:46:40, skipping insertion in model container [2021-08-27 06:46:40,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:46:40" (3/3) ... [2021-08-27 06:46:40,864 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-1.i [2021-08-27 06:46:40,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:46:40,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2021-08-27 06:46:40,902 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:46:40,908 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 06:46:40,908 INFO L340 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2021-08-27 06:46:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 71 states have (on average 2.23943661971831) internal successors, (159), 135 states have internal predecessors, (159), 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 06:46:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 06:46:40,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:40,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:46:40,928 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:40,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2002332123, now seen corresponding path program 1 times [2021-08-27 06:46:40,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:40,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604297529] [2021-08-27 06:46:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:40,943 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:40,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:40,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-27 06:46:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:41,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 06:46:41,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:41,346 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 06:46:41,359 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 06:46:41,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:41,425 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 06:46:41,426 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:41,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604297529] [2021-08-27 06:46:41,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604297529] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:41,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:41,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-27 06:46:41,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217970095] [2021-08-27 06:46:41,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 06:46:41,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 06:46:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:46:41,446 INFO L87 Difference]: Start difference. First operand has 140 states, 71 states have (on average 2.23943661971831) internal successors, (159), 135 states have internal predecessors, (159), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 06:46:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:41,722 INFO L93 Difference]: Finished difference Result 157 states and 160 transitions. [2021-08-27 06:46:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 06:46:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-08-27 06:46:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:41,731 INFO L225 Difference]: With dead ends: 157 [2021-08-27 06:46:41,731 INFO L226 Difference]: Without dead ends: 154 [2021-08-27 06:46:41,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:46:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-27 06:46:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2021-08-27 06:46:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 70 states have (on average 1.9) internal successors, (133), 130 states have internal predecessors, (133), 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 06:46:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-08-27 06:46:41,766 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 7 [2021-08-27 06:46:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:41,767 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-08-27 06:46:41,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 06:46:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-08-27 06:46:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 06:46:41,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:41,768 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:46:41,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-27 06:46:41,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:41,977 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:41,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2002332124, now seen corresponding path program 1 times [2021-08-27 06:46:41,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:41,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053958707] [2021-08-27 06:46:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:41,979 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:41,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:42,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-27 06:46:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:42,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:46:42,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:42,264 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 06:46:42,285 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 06:46:42,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:42,384 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 06:46:42,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:42,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053958707] [2021-08-27 06:46:42,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053958707] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:42,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:42,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-08-27 06:46:42,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634644719] [2021-08-27 06:46:42,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:46:42,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:46:42,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:46:42,388 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 06:46:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:42,705 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2021-08-27 06:46:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 06:46:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2021-08-27 06:46:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:42,707 INFO L225 Difference]: With dead ends: 159 [2021-08-27 06:46:42,707 INFO L226 Difference]: Without dead ends: 159 [2021-08-27 06:46:42,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:46:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-27 06:46:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 131. [2021-08-27 06:46:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 70 states have (on average 1.8571428571428572) internal successors, (130), 127 states have internal predecessors, (130), 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 06:46:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2021-08-27 06:46:42,716 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 7 [2021-08-27 06:46:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:42,716 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2021-08-27 06:46:42,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 06:46:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2021-08-27 06:46:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 06:46:42,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:42,717 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:46:42,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-27 06:46:42,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:42,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1527248073, now seen corresponding path program 1 times [2021-08-27 06:46:42,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:42,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579245451] [2021-08-27 06:46:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:42,927 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:42,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:42,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-27 06:46:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:43,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:46:43,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:43,220 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 06:46:43,291 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 06:46:43,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:43,387 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 06:46:43,387 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:43,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579245451] [2021-08-27 06:46:43,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579245451] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:43,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:43,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-27 06:46:43,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152648838] [2021-08-27 06:46:43,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:46:43,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:43,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:46:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:46:43,390 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 06:46:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:43,769 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2021-08-27 06:46:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:46:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-08-27 06:46:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:43,771 INFO L225 Difference]: With dead ends: 135 [2021-08-27 06:46:43,771 INFO L226 Difference]: Without dead ends: 135 [2021-08-27 06:46:43,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 8 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:46:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-27 06:46:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 118. [2021-08-27 06:46:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 72 states have (on average 1.6527777777777777) internal successors, (119), 114 states have internal predecessors, (119), 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 06:46:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-08-27 06:46:43,778 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 12 [2021-08-27 06:46:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-08-27 06:46:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 06:46:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-08-27 06:46:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 06:46:43,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:43,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:46:43,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-27 06:46:43,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:43,990 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1527248072, now seen corresponding path program 1 times [2021-08-27 06:46:43,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:43,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906410566] [2021-08-27 06:46:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:43,992 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:43,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:43,993 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:43,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-27 06:46:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:46:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:44,269 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 06:46:44,394 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 06:46:44,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:44,591 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 06:46:44,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:44,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906410566] [2021-08-27 06:46:44,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906410566] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:44,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:44,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-27 06:46:44,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156804398] [2021-08-27 06:46:44,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:46:44,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:46:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:46:44,594 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 06:46:45,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:45,267 INFO L93 Difference]: Finished difference Result 204 states and 208 transitions. [2021-08-27 06:46:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:46:45,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 12 [2021-08-27 06:46:45,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:45,270 INFO L225 Difference]: With dead ends: 204 [2021-08-27 06:46:45,270 INFO L226 Difference]: Without dead ends: 204 [2021-08-27 06:46:45,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:46:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-27 06:46:45,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 150. [2021-08-27 06:46:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 108 states have (on average 1.5) internal successors, (162), 146 states have internal predecessors, (162), 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 06:46:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2021-08-27 06:46:45,278 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 12 [2021-08-27 06:46:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:45,279 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2021-08-27 06:46:45,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 06:46:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2021-08-27 06:46:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:46:45,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:45,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:46:45,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-27 06:46:45,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:45,489 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1658067155, now seen corresponding path program 1 times [2021-08-27 06:46:45,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:45,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722968002] [2021-08-27 06:46:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:45,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:45,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:45,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:45,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-27 06:46:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 06:46:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:45,777 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 06:46:45,797 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 06:46:45,829 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 21 treesize of output 13 [2021-08-27 06:46:45,842 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 06:46:45,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:45,922 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 06:46:45,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:45,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722968002] [2021-08-27 06:46:45,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722968002] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:45,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:45,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-27 06:46:45,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066004965] [2021-08-27 06:46:45,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:46:45,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:45,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:46:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:46:45,929 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 06:46:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:46,255 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2021-08-27 06:46:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:46:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 15 [2021-08-27 06:46:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:46,256 INFO L225 Difference]: With dead ends: 149 [2021-08-27 06:46:46,257 INFO L226 Difference]: Without dead ends: 149 [2021-08-27 06:46:46,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:46:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-27 06:46:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-08-27 06:46:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 145 states have internal predecessors, (160), 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 06:46:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2021-08-27 06:46:46,263 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 15 [2021-08-27 06:46:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:46,263 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2021-08-27 06:46:46,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 06:46:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2021-08-27 06:46:46,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:46:46,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:46,264 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:46:46,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-27 06:46:46,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:46,475 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:46,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:46,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1658067154, now seen corresponding path program 1 times [2021-08-27 06:46:46,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:46,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589360606] [2021-08-27 06:46:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:46,476 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:46,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:46,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:46,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-27 06:46:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:46,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:46:46,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:46,777 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 06:46:46,808 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 17 treesize of output 13 [2021-08-27 06:46:46,817 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 06:46:46,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-08-27 06:46:46,872 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 20 treesize of output 12 [2021-08-27 06:46:46,893 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 06:46:46,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:47,137 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 06:46:47,137 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:47,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589360606] [2021-08-27 06:46:47,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589360606] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:47,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:47,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-08-27 06:46:47,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935094705] [2021-08-27 06:46:47,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 06:46:47,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 06:46:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:46:47,139 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 06:46:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:47,903 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-08-27 06:46:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:46:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 15 [2021-08-27 06:46:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:47,904 INFO L225 Difference]: With dead ends: 148 [2021-08-27 06:46:47,904 INFO L226 Difference]: Without dead ends: 148 [2021-08-27 06:46:47,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:46:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-27 06:46:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-08-27 06:46:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.462962962962963) internal successors, (158), 144 states have internal predecessors, (158), 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 06:46:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 161 transitions. [2021-08-27 06:46:47,911 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 161 transitions. Word has length 15 [2021-08-27 06:46:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:47,911 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 161 transitions. [2021-08-27 06:46:47,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 06:46:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 161 transitions. [2021-08-27 06:46:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:46:47,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:47,912 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 06:46:47,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-27 06:46:48,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:48,121 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash -590920786, now seen corresponding path program 1 times [2021-08-27 06:46:48,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:48,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875197736] [2021-08-27 06:46:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:48,122 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:48,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:48,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:48,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-27 06:46:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:48,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 06:46:48,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:48,436 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 06:46:48,458 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 19 treesize of output 15 [2021-08-27 06:46:48,486 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 06:46:48,498 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 06:46:48,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:48,580 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 06:46:48,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:48,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875197736] [2021-08-27 06:46:48,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875197736] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:48,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:48,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-27 06:46:48,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729425348] [2021-08-27 06:46:48,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:46:48,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:46:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:46:48,582 INFO L87 Difference]: Start difference. First operand 148 states and 161 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 06:46:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:48,916 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2021-08-27 06:46:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 06:46:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 17 [2021-08-27 06:46:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:48,918 INFO L225 Difference]: With dead ends: 147 [2021-08-27 06:46:48,918 INFO L226 Difference]: Without dead ends: 147 [2021-08-27 06:46:48,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:46:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-27 06:46:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-08-27 06:46:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 143 states have internal predecessors, (156), 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 06:46:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2021-08-27 06:46:48,922 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 17 [2021-08-27 06:46:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:48,922 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2021-08-27 06:46:48,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 06:46:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2021-08-27 06:46:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:46:48,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:48,923 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 06:46:48,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-27 06:46:49,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:49,133 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash -590920785, now seen corresponding path program 1 times [2021-08-27 06:46:49,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:49,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149987428] [2021-08-27 06:46:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:49,134 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:49,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:49,135 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:49,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-27 06:46:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:46:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:49,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:46:49,528 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 06:46:49,537 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 17 treesize of output 13 [2021-08-27 06:46:49,588 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 31 treesize of output 23 [2021-08-27 06:46:49,593 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 20 treesize of output 12 [2021-08-27 06:46:49,614 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 06:46:49,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:49,843 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 06:46:49,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:49,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149987428] [2021-08-27 06:46:49,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149987428] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:49,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:49,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-08-27 06:46:49,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586025491] [2021-08-27 06:46:49,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 06:46:49,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:49,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 06:46:49,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:46:49,846 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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 06:46:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:50,614 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2021-08-27 06:46:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:46:50,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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 17 [2021-08-27 06:46:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:50,615 INFO L225 Difference]: With dead ends: 146 [2021-08-27 06:46:50,615 INFO L226 Difference]: Without dead ends: 146 [2021-08-27 06:46:50,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-27 06:46:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-27 06:46:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-08-27 06:46:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.4259259259259258) 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 06:46:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2021-08-27 06:46:50,619 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 17 [2021-08-27 06:46:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:50,619 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2021-08-27 06:46:50,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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 06:46:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2021-08-27 06:46:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:46:50,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:50,621 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 06:46:50,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-27 06:46:50,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:50,830 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash -915858257, now seen corresponding path program 1 times [2021-08-27 06:46:50,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:50,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850657119] [2021-08-27 06:46:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:50,831 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:50,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:50,831 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:50,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-08-27 06:46:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:51,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 06:46:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:51,168 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 06:46:51,257 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-27 06:46:51,258 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 24 treesize of output 31 [2021-08-27 06:46:51,338 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 24 treesize of output 20 [2021-08-27 06:46:51,517 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:46:51,517 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 43 treesize of output 33 [2021-08-27 06:46:51,663 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:46:51,664 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 61 treesize of output 42 [2021-08-27 06:46:51,814 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 06:46:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:46:57,550 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~x~0.base))) c_main_~x~0.base) c_main_~x~0.offset)))))))))) (_ bv1 1)))) is different from false [2021-08-27 06:46:57,662 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 06:46:57,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:46:57,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850657119] [2021-08-27 06:46:57,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850657119] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:46:57,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:46:57,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 14 [2021-08-27 06:46:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720258843] [2021-08-27 06:46:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 06:46:57,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:46:57,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 06:46:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=4, NotChecked=24, Total=210 [2021-08-27 06:46:57,665 INFO L87 Difference]: Start difference. First operand 146 states and 157 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 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 06:46:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:46:59,366 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2021-08-27 06:46:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 06:46:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 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 19 [2021-08-27 06:46:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:46:59,368 INFO L225 Difference]: With dead ends: 156 [2021-08-27 06:46:59,368 INFO L226 Difference]: Without dead ends: 156 [2021-08-27 06:46:59,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 6234.0ms TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=4, NotChecked=42, Total=552 [2021-08-27 06:46:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-27 06:46:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2021-08-27 06:46:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 141 states have internal predecessors, (153), 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 06:46:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2021-08-27 06:46:59,372 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 19 [2021-08-27 06:46:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:46:59,372 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2021-08-27 06:46:59,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 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 06:46:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2021-08-27 06:46:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:46:59,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:46:59,373 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 06:46:59,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-08-27 06:46:59,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:46:59,584 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:46:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:46:59,584 INFO L82 PathProgramCache]: Analyzing trace with hash -915858256, now seen corresponding path program 1 times [2021-08-27 06:46:59,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:46:59,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908659468] [2021-08-27 06:46:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:46:59,587 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:46:59,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:46:59,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:46:59,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-08-27 06:46:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:46:59,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-27 06:46:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:46:59,998 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 06:47:00,065 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:47:00,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-27 06:47:00,079 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 06:47:00,115 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 06:47:00,124 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 06:47:00,267 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:47:00,268 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 67 treesize of output 49 [2021-08-27 06:47:00,295 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:47:00,296 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 59 treesize of output 54 [2021-08-27 06:47:00,439 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:47:00,439 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 65 treesize of output 42 [2021-08-27 06:47:00,447 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:47:00,447 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 36 treesize of output 19 [2021-08-27 06:47:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:47:00,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:47:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:47:09,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:47:09,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908659468] [2021-08-27 06:47:09,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908659468] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:47:09,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:47:09,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-08-27 06:47:09,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412064698] [2021-08-27 06:47:09,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 06:47:09,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:47:09,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 06:47:09,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-08-27 06:47:09,425 INFO L87 Difference]: Start difference. First operand 145 states and 156 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 06:47:25,550 WARN L207 SmtUtils]: Spent 7.02 s on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-08-27 06:47:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:47:30,907 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2021-08-27 06:47:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 06:47:30,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 19 [2021-08-27 06:47:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:47:30,908 INFO L225 Difference]: With dead ends: 148 [2021-08-27 06:47:30,908 INFO L226 Difference]: Without dead ends: 148 [2021-08-27 06:47:30,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 27264.9ms TimeCoverageRelationStatistics Valid=285, Invalid=904, Unknown=1, NotChecked=0, Total=1190 [2021-08-27 06:47:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-27 06:47:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2021-08-27 06:47:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 119 states have internal predecessors, (130), 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 06:47:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2021-08-27 06:47:30,913 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 19 [2021-08-27 06:47:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:47:30,913 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2021-08-27 06:47:30,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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 06:47:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2021-08-27 06:47:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:47:30,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:47:30,914 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 06:47:30,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-08-27 06:47:31,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:47:31,121 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr27REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:47:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:47:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash 949884095, now seen corresponding path program 1 times [2021-08-27 06:47:31,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:47:31,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522258954] [2021-08-27 06:47:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:47:31,122 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:47:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:47:31,123 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:47:31,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-08-27 06:47:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:47:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:47:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:47:31,546 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 06:47:31,644 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-27 06:47:31,644 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 27 treesize of output 34 [2021-08-27 06:47:31,704 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 23 treesize of output 19 [2021-08-27 06:47:31,905 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:47:31,905 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 41 treesize of output 31 [2021-08-27 06:47:32,043 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:47:32,044 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 60 treesize of output 41 [2021-08-27 06:47:32,103 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 06:47:32,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:47:33,253 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem9.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem9.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem9.base|) (bvadd (_ bv4 32) |main_#t~mem9.offset|) c_main_~x~0.base)) c_main_~x~0.base) c_main_~x~0.offset)))))))) (_ bv1 1)))) is different from false [2021-08-27 06:47:34,421 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 06:47:34,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:47:34,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522258954] [2021-08-27 06:47:34,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522258954] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:47:34,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:47:34,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 5] imperfect sequences [] total 12 [2021-08-27 06:47:34,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348593575] [2021-08-27 06:47:34,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 06:47:34,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:47:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 06:47:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2021-08-27 06:47:34,423 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 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 06:47:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:47:35,393 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2021-08-27 06:47:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 06:47:35,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 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 20 [2021-08-27 06:47:35,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:47:35,394 INFO L225 Difference]: With dead ends: 127 [2021-08-27 06:47:35,394 INFO L226 Difference]: Without dead ends: 127 [2021-08-27 06:47:35,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2690.9ms TimeCoverageRelationStatistics Valid=113, Invalid=310, Unknown=1, NotChecked=38, Total=462 [2021-08-27 06:47:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-27 06:47:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2021-08-27 06:47:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 93 states have (on average 1.3870967741935485) internal successors, (129), 118 states have internal predecessors, (129), 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 06:47:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2021-08-27 06:47:35,397 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 20 [2021-08-27 06:47:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:47:35,398 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2021-08-27 06:47:35,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 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 06:47:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2021-08-27 06:47:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:47:35,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:47:35,399 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 06:47:35,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-08-27 06:47:35,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:47:35,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:47:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:47:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 949884096, now seen corresponding path program 1 times [2021-08-27 06:47:35,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:47:35,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579838281] [2021-08-27 06:47:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:47:35,606 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:47:35,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:47:35,607 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:47:35,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-08-27 06:47:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:47:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 06:47:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:47:36,070 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 06:47:36,150 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 06:47:36,166 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:47:36,167 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 20 treesize of output 20 [2021-08-27 06:47:36,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 06:47:36,218 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 06:47:36,369 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:47:36,370 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 67 treesize of output 49 [2021-08-27 06:47:36,398 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-08-27 06:47:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-08-27 06:47:36,540 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:47:36,540 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 65 treesize of output 42 [2021-08-27 06:47:36,547 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:47:36,547 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 36 treesize of output 19 [2021-08-27 06:47:36,573 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 06:47:36,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:47:46,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 06:47:46,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 06:47:46,210 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 06:47:46,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:47:46,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579838281] [2021-08-27 06:47:46,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579838281] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:47:46,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:47:46,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-08-27 06:47:46,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180243476] [2021-08-27 06:47:46,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 06:47:46,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:47:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 06:47:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=141, Unknown=3, NotChecked=0, Total=182 [2021-08-27 06:47:46,212 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 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 06:47:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:47:48,509 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-08-27 06:47:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 06:47:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 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 20 [2021-08-27 06:47:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:47:48,510 INFO L225 Difference]: With dead ends: 126 [2021-08-27 06:47:48,510 INFO L226 Difference]: Without dead ends: 126 [2021-08-27 06:47:48,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 9879.4ms TimeCoverageRelationStatistics Valid=125, Invalid=378, Unknown=3, NotChecked=0, Total=506 [2021-08-27 06:47:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-27 06:47:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2021-08-27 06:47:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.3763440860215055) internal successors, (128), 117 states have internal predecessors, (128), 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 06:47:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2021-08-27 06:47:48,514 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 20 [2021-08-27 06:47:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:47:48,514 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2021-08-27 06:47:48,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 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 06:47:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2021-08-27 06:47:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:47:48,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:47:48,515 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] [2021-08-27 06:47:48,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-08-27 06:47:48,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:47:48,726 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr16ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:47:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:47:48,726 INFO L82 PathProgramCache]: Analyzing trace with hash 328512111, now seen corresponding path program 1 times [2021-08-27 06:47:48,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:47:48,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116925103] [2021-08-27 06:47:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:47:48,727 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:47:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:47:48,728 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:47:48,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-08-27 06:47:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:47:49,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 06:47:49,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:47:49,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 06:47:49,284 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:47:49,285 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 18 treesize of output 18 [2021-08-27 06:47:49,328 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 06:47:49,447 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:47:49,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-08-27 06:47:49,521 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:47:49,523 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 37 treesize of output 18 [2021-08-27 06:47:49,564 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 06:47:49,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:47:52,514 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~x~0.base))) c_main_~x~0.base) c_main_~x~0.offset) (_ bv0 32)))) is different from false [2021-08-27 06:47:52,598 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 06:47:52,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:47:52,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116925103] [2021-08-27 06:47:52,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116925103] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:47:52,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:47:52,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 14 [2021-08-27 06:47:52,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802665995] [2021-08-27 06:47:52,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 06:47:52,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:47:52,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 06:47:52,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=125, Unknown=2, NotChecked=22, Total=182 [2021-08-27 06:47:52,600 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 06:48:07,282 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (and (not (= |c_main_#t~mem7.base| (_ bv0 32))) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~x~0.base)) c_main_~x~0.base) c_main_~x~0.offset) (_ bv0 32)))) (not (= .cse0 c_main_~x~0.base)) (not (= c_main_~x~0.base (_ bv0 32))) (not (= .cse0 (_ bv0 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~head~0.base))))) (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~x~0.base)))))) (_ bv1 1))) (exists ((|main_#t~mem6.offset| (_ BitVec 32))) (= c_main_~x~0.base (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset)) (bvadd |main_#t~mem6.offset| (_ bv4 32))))))) is different from false [2021-08-27 06:48:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:48:18,400 INFO L93 Difference]: Finished difference Result 214 states and 231 transitions. [2021-08-27 06:48:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 06:48:18,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 21 [2021-08-27 06:48:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:48:18,402 INFO L225 Difference]: With dead ends: 214 [2021-08-27 06:48:18,402 INFO L226 Difference]: Without dead ends: 214 [2021-08-27 06:48:18,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 27745.2ms TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=8, NotChecked=142, Total=1482 [2021-08-27 06:48:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-27 06:48:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 119. [2021-08-27 06:48:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 92 states have (on average 1.3695652173913044) internal successors, (126), 115 states have internal predecessors, (126), 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 06:48:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2021-08-27 06:48:18,406 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 21 [2021-08-27 06:48:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:48:18,406 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2021-08-27 06:48:18,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 06:48:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2021-08-27 06:48:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 06:48:18,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:48:18,407 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] [2021-08-27 06:48:18,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-08-27 06:48:18,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:48:18,618 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr29ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:48:18,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:48:18,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1542358574, now seen corresponding path program 1 times [2021-08-27 06:48:18,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:48:18,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844730903] [2021-08-27 06:48:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:48:18,619 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:48:18,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:48:18,619 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:48:18,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-08-27 06:48:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:48:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:48:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:48:19,227 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 06:48:19,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:48:19,346 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 06:48:19,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:48:19,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844730903] [2021-08-27 06:48:19,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844730903] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:48:19,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:48:19,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-27 06:48:19,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088518627] [2021-08-27 06:48:19,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:48:19,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:48:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:48:19,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:48:19,348 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 06:48:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:48:19,695 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2021-08-27 06:48:19,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:48:19,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 23 [2021-08-27 06:48:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:48:19,697 INFO L225 Difference]: With dead ends: 179 [2021-08-27 06:48:19,698 INFO L226 Difference]: Without dead ends: 179 [2021-08-27 06:48:19,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:48:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-27 06:48:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 117. [2021-08-27 06:48:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 113 states have internal predecessors, (124), 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 06:48:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2021-08-27 06:48:19,701 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 23 [2021-08-27 06:48:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:48:19,701 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2021-08-27 06:48:19,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 06:48:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2021-08-27 06:48:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 06:48:19,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:48:19,703 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 06:48:19,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-08-27 06:48:19,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:48:19,913 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr39ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:48:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:48:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash 107625458, now seen corresponding path program 1 times [2021-08-27 06:48:19,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:48:19,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570041289] [2021-08-27 06:48:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:48:19,914 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:48:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:48:19,915 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:48:19,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-08-27 06:48:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:48:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 06:48:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:48:20,566 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 06:48:20,586 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 06:48:20,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:48:20,716 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 06:48:20,717 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:48:20,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570041289] [2021-08-27 06:48:20,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570041289] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:48:20,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:48:20,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-08-27 06:48:20,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919342763] [2021-08-27 06:48:20,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:48:20,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:48:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:48:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:48:20,720 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 06:48:20,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:48:20,933 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-08-27 06:48:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:48:20,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 28 [2021-08-27 06:48:20,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:48:20,934 INFO L225 Difference]: With dead ends: 115 [2021-08-27 06:48:20,935 INFO L226 Difference]: Without dead ends: 115 [2021-08-27 06:48:20,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:48:20,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-27 06:48:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-08-27 06:48:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 90 states have (on average 1.3444444444444446) internal successors, (121), 111 states have internal predecessors, (121), 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 06:48:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2021-08-27 06:48:20,938 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 28 [2021-08-27 06:48:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:48:20,938 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2021-08-27 06:48:20,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 06:48:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2021-08-27 06:48:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 06:48:20,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:48:20,939 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 06:48:20,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-08-27 06:48:21,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:48:21,152 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 59 more)] === [2021-08-27 06:48:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:48:21,152 INFO L82 PathProgramCache]: Analyzing trace with hash 107658229, now seen corresponding path program 1 times [2021-08-27 06:48:21,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:48:21,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083918046] [2021-08-27 06:48:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:48:21,153 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:48:21,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:48:21,153 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:48:21,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-08-27 06:48:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:48:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 06:48:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:48:21,763 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 06:48:21,859 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 06:48:21,935 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:48:21,935 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 17 treesize of output 17 [2021-08-27 06:48:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:48:21,986 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 06:48:21,997 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 06:48:22,151 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:48:22,151 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 70 treesize of output 52 [2021-08-27 06:48:22,175 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-27 06:48:22,175 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 62 treesize of output 34 [2021-08-27 06:48:22,299 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:48:22,299 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 29 treesize of output 14 [2021-08-27 06:48:22,360 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-27 06:48:22,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-08-27 06:48:22,550 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-08-27 06:48:22,551 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 06:48:22,591 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 06:48:22,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:48:38,455 WARN L207 SmtUtils]: Spent 6.89 s on a formula simplification that was a NOOP. DAG size: 30 [2021-08-27 06:48:50,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:48:50,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083918046] [2021-08-27 06:48:50,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 06:48:50,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [158979783] [2021-08-27 06:48:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:48:50,551 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-27 06:48:50,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-27 06:48:50,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-27 06:48:50,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-08-27 06:48:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:48:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 06:48:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:48:51,304 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 06:48:51,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 06:48:51,656 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:48:51,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-27 06:48:51,749 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 06:48:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:48:51,759 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 06:48:51,969 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:48:51,970 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 70 treesize of output 52 [2021-08-27 06:48:51,993 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-27 06:48:51,993 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 62 treesize of output 34 [2021-08-27 06:48:52,141 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:48:52,141 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 29 treesize of output 14 [2021-08-27 06:48:52,231 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-27 06:48:52,231 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 06:48:52,538 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:48:52,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 14 [2021-08-27 06:48:52,553 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 06:48:52,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:49:01,293 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|main_#t~mem9.offset| (_ BitVec 32))) (not (= c_main_~head~0.base (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |main_#t~mem9.offset|) c_main_~x~0.base))) c_main_~x~0.base) c_main_~x~0.offset)))) (forall ((v_DerPreprocessor_1 (_ BitVec 32)) (|main_#t~mem9.offset| (_ BitVec 32))) (= (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (store |c_#memory_int| .cse1 (store (select |c_#memory_int| .cse1) (bvadd (_ bv4 32) |main_#t~mem9.offset|) v_DerPreprocessor_1))) c_main_~head~0.base) (bvadd c_main_~head~0.offset (_ bv8 32))) (_ bv1 32)))) is different from false [2021-08-27 06:49:01,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 06:49:01,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473568181] [2021-08-27 06:49:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:49:01,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:49:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:49:01,341 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 06:49:01,342 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 06:49:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:49:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 06:49:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:49:02,202 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 06:49:02,283 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 06:49:02,284 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 20 treesize of output 20 [2021-08-27 06:49:02,318 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 06:49:02,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:49:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 06:49:02,438 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-08-27 06:49:02,439 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 70 treesize of output 52 [2021-08-27 06:49:02,459 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-08-27 06:49:02,459 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 62 treesize of output 34 [2021-08-27 06:49:02,533 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:49:02,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-08-27 06:49:02,570 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-27 06:49:02,572 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 06:49:02,690 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-08-27 06:49:02,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 14 [2021-08-27 06:49:02,712 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 06:49:02,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:49:04,836 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (|main_#t~mem9.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_int| |c_main_#t~mem9.base| (store (select |c_#memory_int| |c_main_#t~mem9.base|) (bvadd (_ bv4 32) |main_#t~mem9.offset|) v_DerPreprocessor_4)) c_main_~head~0.base) (bvadd c_main_~head~0.offset (_ bv8 32))) (_ bv1 32))) (forall ((|main_#t~mem9.offset| (_ BitVec 32))) (not (= c_main_~head~0.base (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem9.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem9.base|) (bvadd (_ bv4 32) |main_#t~mem9.offset|) c_main_~x~0.base)) c_main_~x~0.base) c_main_~x~0.offset))))) is different from false [2021-08-27 06:49:06,870 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|main_#t~mem9.offset| (_ BitVec 32))) (not (= c_main_~head~0.base (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) |main_#t~mem9.offset|) c_main_~x~0.base))) c_main_~x~0.base) c_main_~x~0.offset)))) (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (|main_#t~mem9.offset| (_ BitVec 32))) (= (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (store |c_#memory_int| .cse1 (store (select |c_#memory_int| .cse1) (bvadd (_ bv4 32) |main_#t~mem9.offset|) v_DerPreprocessor_4))) c_main_~head~0.base) (bvadd c_main_~head~0.offset (_ bv8 32))) (_ bv1 32)))) is different from false [2021-08-27 06:49:06,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-27 06:49:06,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:49:06,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-27 06:49:06,898 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-27 06:49:06,898 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-27 06:49:06,901 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:49:06,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:49:06,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:49:06,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:49:06,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:49:06,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 06:49:06,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 06:49:06,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 06:49:06,903 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-08-27 06:49:06,904 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-08-27 06:49:06,905 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-08-27 06:49:06,906 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:49:06,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-08-27 06:49:06,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-08-27 06:49:06,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-08-27 06:49:06,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-08-27 06:49:06,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:49:06,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-08-27 06:49:06,907 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-08-27 06:49:06,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-08-27 06:49:06,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-08-27 06:49:06,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-08-27 06:49:06,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-08-27 06:49:06,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:49:06,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55REQUIRES_VIOLATION [2021-08-27 06:49:06,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56REQUIRES_VIOLATION [2021-08-27 06:49:06,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr60ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr61ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr62ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 06:49:06,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr63ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:49:06,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-08-27 06:49:07,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-08-27 06:49:07,339 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 06:49:07,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:49:07,526 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:49:07,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:49:07 BoogieIcfgContainer [2021-08-27 06:49:07,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:49:07,534 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:49:07,534 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:49:07,535 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:49:07,535 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:46:40" (3/4) ... [2021-08-27 06:49:07,537 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 06:49:07,537 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:49:07,538 INFO L168 Benchmark]: Toolchain (without parser) took 148289.51 ms. Allocated memory was 58.7 MB in the beginning and 119.5 MB in the end (delta: 60.8 MB). Free memory was 36.5 MB in the beginning and 58.6 MB in the end (delta: -22.1 MB). Peak memory consumption was 39.5 MB. Max. memory is 16.1 GB. [2021-08-27 06:49:07,538 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 58.7 MB. Free memory was 41.2 MB in the beginning and 41.2 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:49:07,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 448.59 ms. Allocated memory is still 58.7 MB. Free memory was 36.4 MB in the beginning and 34.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-27 06:49:07,538 INFO L168 Benchmark]: Boogie Preprocessor took 100.52 ms. Allocated memory is still 58.7 MB. Free memory was 33.8 MB in the beginning and 30.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:49:07,539 INFO L168 Benchmark]: RCFGBuilder took 1056.17 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 30.7 MB in the beginning and 51.9 MB in the end (delta: -21.2 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2021-08-27 06:49:07,539 INFO L168 Benchmark]: TraceAbstraction took 146675.30 ms. Allocated memory was 81.8 MB in the beginning and 119.5 MB in the end (delta: 37.7 MB). Free memory was 51.8 MB in the beginning and 58.6 MB in the end (delta: -6.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. [2021-08-27 06:49:07,539 INFO L168 Benchmark]: Witness Printer took 2.90 ms. Allocated memory is still 119.5 MB. Free memory is still 58.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:49:07,540 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 58.7 MB. Free memory was 41.2 MB in the beginning and 41.2 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 448.59 ms. Allocated memory is still 58.7 MB. Free memory was 36.4 MB in the beginning and 34.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 100.52 ms. Allocated memory is still 58.7 MB. Free memory was 33.8 MB in the beginning and 30.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1056.17 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 30.7 MB in the beginning and 51.9 MB in the end (delta: -21.2 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 146675.30 ms. Allocated memory was 81.8 MB in the beginning and 119.5 MB in the end (delta: 37.7 MB). Free memory was 51.8 MB in the beginning and 58.6 MB in the end (delta: -6.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 16.1 GB. * Witness Printer took 2.90 ms. Allocated memory is still 119.5 MB. Free memory is still 58.6 MB. There was no memory consumed. 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 - UnprovableResult [Line: 1032]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: unable to decide satisfiability of path constraint, overapproximation of memtrack at line 1032. Possible FailurePath: [L1004] SLL* head = malloc(sizeof(SLL)); [L1005] head->next = ((void*)0) [L1006] head->prev = ((void*)0) [L1007] head->data = 0 [L1009] SLL* x = head; [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1021] x->data = 1 [L1022] x->next = malloc(sizeof(SLL)) [L1023] EXPR x->next [L1023] x->next->prev = x [L1024] EXPR x->next [L1024] x->next->data = 2 [L1026] x = head [L1028] COND FALSE !(!(((void*)0) != x)) [L1030] EXPR x->data [L1030] COND TRUE 1 != x->data [L1032] EXPR x->data [L1032] COND TRUE !(0 == x->data) [L1032] reach_error() - UnprovableResult [Line: 1005]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1005]: 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: 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: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: 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 all allocated memory was freed Unable to prove that all allocated memory was freed 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: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1024]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed 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: 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: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1036]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1041]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed 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: 1048]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: 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 5 procedures, 149 locations, 64 error locations. Started 1 CEGAR loops. OverallTime: 146623.7ms, OverallIterations: 16, TraceHistogramMax: 1, EmptinessCheckTime: 17.2ms, AutomataDifference: 56719.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1119 SDtfs, 2112 SDslu, 2843 SDs, 0 SdLazy, 3865 SolverSat, 265 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9932.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 580 GetRequests, 357 SyntacticMatches, 41 SemanticMatches, 182 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 74654.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=4, InterpolantAutomatonStates: 148, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86.0ms AutomataMinimizationTime, 15 MinimizatonAttempts, 322 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 192.0ms SsaConstructionTime, 599.5ms SatisfiabilityAnalysisTime, 35247.2ms InterpolantComputationTime, 252 NumberOfCodeBlocks, 252 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 474 ConstructedInterpolants, 34 QuantifiedInterpolants, 4036 SizeOfPredicates, 82 NumberOfNonLiveVariables, 1576 ConjunctsInSsa, 100 ConjunctsInUnsatCore, 30 InterpolantComputations, 30 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces [2021-08-27 06:49:07,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...