./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/ldv-memsafety/memleaks_test17_2-2.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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:10:27,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:10:27,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:10:27,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:10:27,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:10:27,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:10:27,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:10:27,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:10:27,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:10:27,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:10:27,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:10:27,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:10:27,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:10:27,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:10:27,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:10:27,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:10:27,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:10:27,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:10:27,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:10:27,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:10:27,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:10:27,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:10:27,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:10:27,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:10:27,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:10:27,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:10:27,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:10:27,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:10:27,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:10:27,154 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:10:27,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:10:27,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:10:27,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:10:27,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:10:27,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:10:27,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:10:27,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:10:27,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:10:27,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:10:27,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:10:27,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:10:27,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:10:27,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:10:27,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:10:27,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:10:27,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:10:27,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:10:27,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:10:27,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:10:27,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:10:27,186 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:10:27,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:10:27,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:10:27,187 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:10:27,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:10:27,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:10:27,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:10:27,187 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:10:27,187 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:10:27,188 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:10:27,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:10:27,188 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:10:27,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:10:27,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:10:27,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:10:27,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:10:27,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:10:27,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:10:27,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:10:27,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:10:27,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:10:27,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:10:27,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:10:27,190 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2021-12-21 18:10:27,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:10:27,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:10:27,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:10:27,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:10:27,400 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:10:27,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-12-21 18:10:27,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38b31399/5a768dce3d4a42acb4dfcf72af3de57c/FLAG05212952b [2021-12-21 18:10:27,896 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:10:27,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-12-21 18:10:27,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38b31399/5a768dce3d4a42acb4dfcf72af3de57c/FLAG05212952b [2021-12-21 18:10:28,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38b31399/5a768dce3d4a42acb4dfcf72af3de57c [2021-12-21 18:10:28,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:10:28,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:10:28,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:10:28,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:10:28,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:10:28,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:10:28" (1/1) ... [2021-12-21 18:10:28,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c52a6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:28, skipping insertion in model container [2021-12-21 18:10:28,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:10:28" (1/1) ... [2021-12-21 18:10:28,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:10:28,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:10:28,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:10:28,828 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-21 18:10:28,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@65e0d769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:28, skipping insertion in model container [2021-12-21 18:10:28,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:10:28,830 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 18:10:28,832 INFO L158 Benchmark]: Toolchain (without parser) took 397.27ms. Allocated memory is still 113.2MB. Free memory was 82.1MB in the beginning and 85.0MB in the end (delta: -2.9MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-21 18:10:28,833 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 88.1MB. Free memory was 48.3MB in the beginning and 48.3MB in the end (delta: 40.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:10:28,833 INFO L158 Benchmark]: CACSL2BoogieTranslator took 395.45ms. Allocated memory is still 113.2MB. Free memory was 82.1MB in the beginning and 85.0MB in the end (delta: -2.9MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-21 18:10:28,835 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 88.1MB. Free memory was 48.3MB in the beginning and 48.3MB in the end (delta: 40.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 395.45ms. Allocated memory is still 113.2MB. Free memory was 82.1MB in the beginning and 85.0MB in the end (delta: -2.9MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:10:30,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:10:30,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:10:30,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:10:30,412 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:10:30,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:10:30,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:10:30,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:10:30,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:10:30,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:10:30,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:10:30,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:10:30,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:10:30,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:10:30,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:10:30,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:10:30,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:10:30,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:10:30,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:10:30,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:10:30,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:10:30,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:10:30,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:10:30,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:10:30,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:10:30,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:10:30,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:10:30,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:10:30,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:10:30,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:10:30,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:10:30,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:10:30,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:10:30,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:10:30,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:10:30,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:10:30,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:10:30,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:10:30,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:10:30,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:10:30,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:10:30,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 18:10:30,463 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:10:30,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:10:30,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:10:30,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:10:30,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:10:30,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:10:30,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:10:30,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:10:30,469 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:10:30,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:10:30,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:10:30,483 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:10:30,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:10:30,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:10:30,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:10:30,484 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:10:30,484 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:10:30,484 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:10:30,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:10:30,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:10:30,484 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 18:10:30,484 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 18:10:30,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:10:30,485 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:10:30,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:10:30,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:10:30,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:10:30,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:10:30,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:10:30,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:10:30,486 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 18:10:30,486 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 18:10:30,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:10:30,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 18:10:30,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2021-12-21 18:10:30,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:10:30,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:10:30,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:10:30,795 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:10:30,796 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:10:30,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-12-21 18:10:30,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f51bf82/238cfbed4e574f5a92434428d5c8c7a9/FLAG7faa47489 [2021-12-21 18:10:31,345 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:10:31,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-12-21 18:10:31,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f51bf82/238cfbed4e574f5a92434428d5c8c7a9/FLAG7faa47489 [2021-12-21 18:10:31,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f51bf82/238cfbed4e574f5a92434428d5c8c7a9 [2021-12-21 18:10:31,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:10:31,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:10:31,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:10:31,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:10:31,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:10:31,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f1a692a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:31, skipping insertion in model container [2021-12-21 18:10:31,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:10:31" (1/1) ... [2021-12-21 18:10:31,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:10:31,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:10:32,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:10:32,080 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 18:10:32,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:10:32,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:10:32,149 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:10:32,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:10:32,240 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:10:32,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32 WrapperNode [2021-12-21 18:10:32,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:10:32,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:10:32,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:10:32,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:10:32,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,302 INFO L137 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 99 [2021-12-21 18:10:32,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:10:32,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:10:32,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:10:32,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:10:32,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:10:32,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:10:32,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:10:32,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:10:32,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (1/1) ... [2021-12-21 18:10:32,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:10:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:10:32,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 18:10:32,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 18:10:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 18:10:32,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 18:10:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:10:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:10:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:10:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:10:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:10:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:10:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:10:32,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:10:32,453 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:10:32,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:10:32,700 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:10:32,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:10:32,710 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 18:10:32,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:10:32 BoogieIcfgContainer [2021-12-21 18:10:32,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:10:32,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:10:32,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:10:32,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:10:32,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:10:31" (1/3) ... [2021-12-21 18:10:32,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aca1de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:10:32, skipping insertion in model container [2021-12-21 18:10:32,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:10:32" (2/3) ... [2021-12-21 18:10:32,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aca1de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:10:32, skipping insertion in model container [2021-12-21 18:10:32,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:10:32" (3/3) ... [2021-12-21 18:10:32,717 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2021-12-21 18:10:32,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:10:32,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-12-21 18:10:32,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:10:32,754 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 18:10:32,754 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-12-21 18:10:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:32,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:10:32,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:32,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:32,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash 858994893, now seen corresponding path program 1 times [2021-12-21 18:10:32,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:32,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302574729] [2021-12-21 18:10:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:32,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:32,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:32,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:32,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 18:10:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 18:10:32,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:32,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:32,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:32,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302574729] [2021-12-21 18:10:32,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302574729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:32,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:32,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:10:32,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682731246] [2021-12-21 18:10:32,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:32,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:10:32,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:32,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:10:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:10:32,912 INFO L87 Difference]: Start difference. First operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:32,924 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-12-21 18:10:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:10:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-21 18:10:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:32,930 INFO L225 Difference]: With dead ends: 67 [2021-12-21 18:10:32,931 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 18:10:32,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:10:32,934 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:32,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:10:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 18:10:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-21 18:10:32,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-21 18:10:32,960 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 14 [2021-12-21 18:10:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:32,960 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-21 18:10:32,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-21 18:10:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:10:32,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:32,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:32,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:33,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:33,169 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash 465967883, now seen corresponding path program 1 times [2021-12-21 18:10:33,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:33,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537987329] [2021-12-21 18:10:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:33,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:33,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:33,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:33,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 18:10:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:33,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:10:33,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:33,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:33,321 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:33,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537987329] [2021-12-21 18:10:33,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537987329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:33,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:33,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:10:33,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116291106] [2021-12-21 18:10:33,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:33,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:10:33,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:10:33,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:33,324 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:33,411 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2021-12-21 18:10:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:10:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-21 18:10:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:33,417 INFO L225 Difference]: With dead ends: 121 [2021-12-21 18:10:33,417 INFO L226 Difference]: Without dead ends: 121 [2021-12-21 18:10:33,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:33,420 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:33,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 252 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:33,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-21 18:10:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2021-12-21 18:10:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:10:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-12-21 18:10:33,430 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2021-12-21 18:10:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:33,430 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-12-21 18:10:33,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:33,430 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-12-21 18:10:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:10:33,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:33,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:33,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-21 18:10:33,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:33,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash 465866789, now seen corresponding path program 1 times [2021-12-21 18:10:33,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160522014] [2021-12-21 18:10:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:33,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:33,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:33,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 18:10:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:33,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 18:10:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:33,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:33,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:33,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:33,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160522014] [2021-12-21 18:10:33,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160522014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:33,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:33,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:10:33,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069414573] [2021-12-21 18:10:33,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:33,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:10:33,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:10:33,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:33,788 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:34,012 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-12-21 18:10:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:10:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-21 18:10:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:34,014 INFO L225 Difference]: With dead ends: 93 [2021-12-21 18:10:34,014 INFO L226 Difference]: Without dead ends: 93 [2021-12-21 18:10:34,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:34,014 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:34,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:10:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-21 18:10:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-12-21 18:10:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:10:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-12-21 18:10:34,020 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 14 [2021-12-21 18:10:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:34,021 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-12-21 18:10:34,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-12-21 18:10:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:10:34,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:34,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:34,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:34,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:34,239 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:34,239 INFO L85 PathProgramCache]: Analyzing trace with hash 465866790, now seen corresponding path program 1 times [2021-12-21 18:10:34,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:34,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815378847] [2021-12-21 18:10:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:34,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:34,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:34,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:34,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 18:10:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:34,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 18:10:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:34,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:34,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:34,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:34,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815378847] [2021-12-21 18:10:34,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815378847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:34,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:34,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 18:10:34,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082559418] [2021-12-21 18:10:34,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:34,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:10:34,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:10:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:10:34,506 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:34,846 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2021-12-21 18:10:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:10:34,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-21 18:10:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:34,847 INFO L225 Difference]: With dead ends: 117 [2021-12-21 18:10:34,847 INFO L226 Difference]: Without dead ends: 117 [2021-12-21 18:10:34,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:10:34,848 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:34,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 433 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 204 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2021-12-21 18:10:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-21 18:10:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2021-12-21 18:10:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5657894736842106) internal successors, (119), 95 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:10:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2021-12-21 18:10:34,856 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 14 [2021-12-21 18:10:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:34,856 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2021-12-21 18:10:34,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2021-12-21 18:10:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:10:34,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:34,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:34,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:35,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:35,063 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:35,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:35,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1353471564, now seen corresponding path program 1 times [2021-12-21 18:10:35,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:35,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315372306] [2021-12-21 18:10:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:35,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:35,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:35,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 18:10:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:35,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:10:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:35,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:35,138 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:35,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315372306] [2021-12-21 18:10:35,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315372306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:35,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:35,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:10:35,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761367816] [2021-12-21 18:10:35,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:35,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:10:35,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:35,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:10:35,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:10:35,140 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:35,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:35,234 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2021-12-21 18:10:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:10:35,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-21 18:10:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:35,236 INFO L225 Difference]: With dead ends: 144 [2021-12-21 18:10:35,236 INFO L226 Difference]: Without dead ends: 142 [2021-12-21 18:10:35,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:10:35,237 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:35,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-21 18:10:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2021-12-21 18:10:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5526315789473684) internal successors, (118), 95 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 18:10:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2021-12-21 18:10:35,243 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 14 [2021-12-21 18:10:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:35,244 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2021-12-21 18:10:35,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2021-12-21 18:10:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:10:35,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:35,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:35,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-21 18:10:35,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:35,445 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:35,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1353370470, now seen corresponding path program 1 times [2021-12-21 18:10:35,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:35,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914985108] [2021-12-21 18:10:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:35,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:35,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:35,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:35,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 18:10:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:35,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:10:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:35,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:35,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:35,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914985108] [2021-12-21 18:10:35,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914985108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:35,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:35,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:10:35,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692912329] [2021-12-21 18:10:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:35,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:10:35,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:10:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:35,560 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:35,583 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2021-12-21 18:10:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:10:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-21 18:10:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:35,584 INFO L225 Difference]: With dead ends: 86 [2021-12-21 18:10:35,584 INFO L226 Difference]: Without dead ends: 84 [2021-12-21 18:10:35,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:10:35,590 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:35,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:10:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-21 18:10:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-21 18:10:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-12-21 18:10:35,595 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 14 [2021-12-21 18:10:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:35,595 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-12-21 18:10:35,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-12-21 18:10:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:10:35,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:35,596 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:35,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:35,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:35,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:35,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1598186502, now seen corresponding path program 1 times [2021-12-21 18:10:35,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:35,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845178090] [2021-12-21 18:10:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:35,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:35,808 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:35,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 18:10:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 18:10:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:35,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:36,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:37,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845178090] [2021-12-21 18:10:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845178090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:37,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:37,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-12-21 18:10:37,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911708912] [2021-12-21 18:10:37,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:37,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 18:10:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:37,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 18:10:37,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:10:37,161 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:38,967 INFO L93 Difference]: Finished difference Result 180 states and 204 transitions. [2021-12-21 18:10:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:10:38,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-12-21 18:10:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:38,969 INFO L225 Difference]: With dead ends: 180 [2021-12-21 18:10:38,969 INFO L226 Difference]: Without dead ends: 180 [2021-12-21 18:10:38,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:10:38,971 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 390 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:38,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 675 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 306 Invalid, 0 Unknown, 131 Unchecked, 1.2s Time] [2021-12-21 18:10:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-21 18:10:38,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 90. [2021-12-21 18:10:38,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.537313432835821) internal successors, (103), 86 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2021-12-21 18:10:38,977 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 17 [2021-12-21 18:10:38,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:38,978 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2021-12-21 18:10:38,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:38,978 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2021-12-21 18:10:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 18:10:38,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:38,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:38,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-21 18:10:39,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:39,179 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash 740047555, now seen corresponding path program 1 times [2021-12-21 18:10:39,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:39,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424842024] [2021-12-21 18:10:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:39,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:39,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:39,185 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:39,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 18:10:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:39,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:10:39,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:39,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:10:39,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:39,305 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:39,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424842024] [2021-12-21 18:10:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424842024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:39,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:39,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:10:39,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061821282] [2021-12-21 18:10:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:39,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:10:39,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:10:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:10:39,308 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:39,465 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2021-12-21 18:10:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:10:39,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-21 18:10:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:39,466 INFO L225 Difference]: With dead ends: 100 [2021-12-21 18:10:39,466 INFO L226 Difference]: Without dead ends: 100 [2021-12-21 18:10:39,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 18:10:39,467 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:39,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 218 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-21 18:10:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2021-12-21 18:10:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 87 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2021-12-21 18:10:39,472 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 22 [2021-12-21 18:10:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:39,473 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2021-12-21 18:10:39,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2021-12-21 18:10:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 18:10:39,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:39,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:39,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-21 18:10:39,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:39,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash 740047556, now seen corresponding path program 1 times [2021-12-21 18:10:39,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:39,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180026493] [2021-12-21 18:10:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:39,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:39,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:39,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:39,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 18:10:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 18:10:39,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:39,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:40,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:40,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:40,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180026493] [2021-12-21 18:10:40,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180026493] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 18:10:40,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:10:40,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2021-12-21 18:10:40,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940839059] [2021-12-21 18:10:40,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:40,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:10:40,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:40,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:10:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:10:40,942 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:41,881 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2021-12-21 18:10:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:10:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-21 18:10:41,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:41,883 INFO L225 Difference]: With dead ends: 108 [2021-12-21 18:10:41,883 INFO L226 Difference]: Without dead ends: 108 [2021-12-21 18:10:41,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:10:41,884 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 138 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:41,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 256 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 38 Unchecked, 0.6s Time] [2021-12-21 18:10:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-21 18:10:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2021-12-21 18:10:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 87 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-12-21 18:10:41,888 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 22 [2021-12-21 18:10:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:41,888 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-12-21 18:10:41,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-12-21 18:10:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:10:41,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:41,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:41,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:42,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:42,090 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:42,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:42,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637803, now seen corresponding path program 1 times [2021-12-21 18:10:42,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:42,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545277767] [2021-12-21 18:10:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:42,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:42,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:42,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:42,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 18:10:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 18:10:42,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:42,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:10:42,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:10:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:42,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:42,307 INFO L387 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 14 treesize of output 12 [2021-12-21 18:10:42,311 INFO L387 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 22 treesize of output 20 [2021-12-21 18:10:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:42,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545277767] [2021-12-21 18:10:42,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545277767] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:42,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:42,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-12-21 18:10:42,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243769002] [2021-12-21 18:10:42,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:42,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:10:42,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:10:42,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:10:42,365 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:42,736 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2021-12-21 18:10:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:10:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-21 18:10:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:42,740 INFO L225 Difference]: With dead ends: 159 [2021-12-21 18:10:42,740 INFO L226 Difference]: Without dead ends: 159 [2021-12-21 18:10:42,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-21 18:10:42,741 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:42,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 299 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:10:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-21 18:10:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2021-12-21 18:10:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.5714285714285714) internal successors, (132), 103 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 18:10:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2021-12-21 18:10:42,754 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 23 [2021-12-21 18:10:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:42,756 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2021-12-21 18:10:42,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2021-12-21 18:10:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:10:42,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:42,758 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:42,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:42,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:42,967 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1828515846, now seen corresponding path program 2 times [2021-12-21 18:10:42,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:42,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266379491] [2021-12-21 18:10:42,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:10:42,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:42,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:42,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 18:10:43,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:10:43,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:10:43,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 18:10:43,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:43,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:43,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:45,762 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:45,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266379491] [2021-12-21 18:10:45,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266379491] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:45,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:45,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-12-21 18:10:45,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795346585] [2021-12-21 18:10:45,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:45,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 18:10:45,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 18:10:45,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-12-21 18:10:45,763 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:48,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 18:10:50,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 18:10:52,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 18:10:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:55,022 INFO L93 Difference]: Finished difference Result 354 states and 426 transitions. [2021-12-21 18:10:55,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 18:10:55,022 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-12-21 18:10:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:55,026 INFO L225 Difference]: With dead ends: 354 [2021-12-21 18:10:55,026 INFO L226 Difference]: Without dead ends: 354 [2021-12-21 18:10:55,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=522, Invalid=1928, Unknown=0, NotChecked=0, Total=2450 [2021-12-21 18:10:55,032 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1036 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:55,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1210 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 800 Invalid, 0 Unknown, 183 Unchecked, 6.6s Time] [2021-12-21 18:10:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-12-21 18:10:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 120. [2021-12-21 18:10:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 96 states have (on average 1.5416666666666667) internal successors, (148), 115 states have internal predecessors, (148), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 18:10:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2021-12-21 18:10:55,062 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 23 [2021-12-21 18:10:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:55,063 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2021-12-21 18:10:55,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:10:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2021-12-21 18:10:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 18:10:55,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:55,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:55,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:55,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:55,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:55,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1778913965, now seen corresponding path program 1 times [2021-12-21 18:10:55,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:55,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090310068] [2021-12-21 18:10:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:55,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:55,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:55,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:55,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 18:10:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:10:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:10:55,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:10:55,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090310068] [2021-12-21 18:10:55,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090310068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:10:55,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:10:55,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:10:55,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884344219] [2021-12-21 18:10:55,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:10:55,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:10:55,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:10:55,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:10:55,461 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:55,521 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2021-12-21 18:10:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:10:55,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-21 18:10:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:55,524 INFO L225 Difference]: With dead ends: 119 [2021-12-21 18:10:55,524 INFO L226 Difference]: Without dead ends: 119 [2021-12-21 18:10:55,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:10:55,524 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 60 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:55,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 162 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:10:55,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-21 18:10:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-12-21 18:10:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.5208333333333333) internal successors, (146), 114 states have internal predecessors, (146), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 18:10:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2021-12-21 18:10:55,527 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 24 [2021-12-21 18:10:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:55,528 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2021-12-21 18:10:55,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 18:10:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2021-12-21 18:10:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 18:10:55,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:55,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:55,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-21 18:10:55,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:55,736 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:55,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1778868221, now seen corresponding path program 1 times [2021-12-21 18:10:55,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:55,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880059912] [2021-12-21 18:10:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:55,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:55,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:55,738 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:10:55,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 18:10:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:55,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:10:55,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:55,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:10:55,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:10:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:55,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:56,047 INFO L387 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 14 treesize of output 12 [2021-12-21 18:10:56,049 INFO L387 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 26 treesize of output 24 [2021-12-21 18:10:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:10:56,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:56,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880059912] [2021-12-21 18:10:56,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880059912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:56,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:56,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-12-21 18:10:56,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109060600] [2021-12-21 18:10:56,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:56,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 18:10:56,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:56,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 18:10:56,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:10:56,112 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:10:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:56,532 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2021-12-21 18:10:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:10:56,534 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-12-21 18:10:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:56,535 INFO L225 Difference]: With dead ends: 166 [2021-12-21 18:10:56,535 INFO L226 Difference]: Without dead ends: 166 [2021-12-21 18:10:56,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:10:56,535 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 130 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:56,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 372 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-12-21 18:10:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-21 18:10:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 123. [2021-12-21 18:10:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 100 states have (on average 1.5) internal successors, (150), 118 states have internal predecessors, (150), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 18:10:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2021-12-21 18:10:56,539 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 24 [2021-12-21 18:10:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:56,539 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2021-12-21 18:10:56,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:10:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2021-12-21 18:10:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:10:56,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:56,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:56,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:10:56,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:56,740 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash -878858933, now seen corresponding path program 1 times [2021-12-21 18:10:56,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:56,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499458199] [2021-12-21 18:10:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:56,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:56,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:56,743 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) [2021-12-21 18:10:56,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 18:10:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 18:10:56,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:56,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:10:56,971 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-21 18:10:56,972 INFO L387 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 17 [2021-12-21 18:10:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:10:56,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:10:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:10:57,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:10:57,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499458199] [2021-12-21 18:10:57,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499458199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:10:57,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:10:57,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-21 18:10:57,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555454133] [2021-12-21 18:10:57,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:10:57,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 18:10:57,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:10:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 18:10:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:10:57,204 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:10:57,495 INFO L93 Difference]: Finished difference Result 187 states and 237 transitions. [2021-12-21 18:10:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:10:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-12-21 18:10:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:10:57,497 INFO L225 Difference]: With dead ends: 187 [2021-12-21 18:10:57,497 INFO L226 Difference]: Without dead ends: 187 [2021-12-21 18:10:57,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:10:57,500 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:10:57,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 429 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2021-12-21 18:10:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-21 18:10:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 142. [2021-12-21 18:10:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 120 states have (on average 1.4666666666666666) internal successors, (176), 135 states have internal predecessors, (176), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:10:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2021-12-21 18:10:57,504 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 26 [2021-12-21 18:10:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:10:57,505 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2021-12-21 18:10:57,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:10:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2021-12-21 18:10:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:10:57,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:10:57,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:10:57,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-21 18:10:57,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:10:57,720 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:10:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:10:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash -878858932, now seen corresponding path program 1 times [2021-12-21 18:10:57,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:10:57,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264508148] [2021-12-21 18:10:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:10:57,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:10:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:10:57,737 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) [2021-12-21 18:10:57,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 18:10:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:10:57,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 18:10:57,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:10:57,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:02,544 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:11:02,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2021-12-21 18:11:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:02,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:03,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:03,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264508148] [2021-12-21 18:11:03,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264508148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:11:03,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776711091] [2021-12-21 18:11:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:03,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:11:03,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:11:03,135 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:11:03,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-12-21 18:11:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-21 18:11:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:03,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:03,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:11:07,936 INFO L387 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 14 treesize of output 16 [2021-12-21 18:11:07,951 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:11:07,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-21 18:11:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:07,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:08,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776711091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:11:08,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:08,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-12-21 18:11:08,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359714218] [2021-12-21 18:11:08,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:08,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 18:11:08,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:08,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 18:11:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=660, Unknown=4, NotChecked=0, Total=756 [2021-12-21 18:11:08,335 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 18:11:10,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:10,846 INFO L93 Difference]: Finished difference Result 149 states and 198 transitions. [2021-12-21 18:11:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:11:10,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-12-21 18:11:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:10,847 INFO L225 Difference]: With dead ends: 149 [2021-12-21 18:11:10,847 INFO L226 Difference]: Without dead ends: 149 [2021-12-21 18:11:10,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=125, Invalid=926, Unknown=5, NotChecked=0, Total=1056 [2021-12-21 18:11:10,848 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 38 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:10,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 797 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 294 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2021-12-21 18:11:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-21 18:11:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-12-21 18:11:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 125 states have (on average 1.464) internal successors, (183), 140 states have internal predecessors, (183), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 18:11:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 197 transitions. [2021-12-21 18:11:10,851 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 197 transitions. Word has length 26 [2021-12-21 18:11:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:10,851 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 197 transitions. [2021-12-21 18:11:10,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 18:11:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 197 transitions. [2021-12-21 18:11:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-21 18:11:10,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:10,852 INFO L514 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] [2021-12-21 18:11:10,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:11,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:11,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:11,255 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:11,255 INFO L85 PathProgramCache]: Analyzing trace with hash -850229781, now seen corresponding path program 1 times [2021-12-21 18:11:11,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:11,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317342924] [2021-12-21 18:11:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:11,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:11,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:11,257 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:11,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 18:11:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 18:11:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:11,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:11:11,384 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:11,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317342924] [2021-12-21 18:11:11,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317342924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:11:11,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:11:11,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:11:11,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441115330] [2021-12-21 18:11:11,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:11:11,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:11:11,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:11:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:11:11,386 INFO L87 Difference]: Start difference. First operand 148 states and 197 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), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:11:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:11,410 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2021-12-21 18:11:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:11:11,410 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), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-21 18:11:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:11,411 INFO L225 Difference]: With dead ends: 161 [2021-12-21 18:11:11,411 INFO L226 Difference]: Without dead ends: 161 [2021-12-21 18:11:11,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:11:11,412 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 37 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:11,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 313 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:11:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-21 18:11:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2021-12-21 18:11:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 116 states have (on average 1.4482758620689655) internal successors, (168), 130 states have internal predecessors, (168), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2021-12-21 18:11:11,415 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 26 [2021-12-21 18:11:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:11,416 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2021-12-21 18:11:11,416 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), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:11:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2021-12-21 18:11:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 18:11:11,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:11,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:11,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-21 18:11:11,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:11,624 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash -24310932, now seen corresponding path program 1 times [2021-12-21 18:11:11,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942123557] [2021-12-21 18:11:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:11,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:11,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:11,626 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:11,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-21 18:11:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:11,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:11:11,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:11,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:11,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:11,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942123557] [2021-12-21 18:11:11,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942123557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:11,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:11,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-12-21 18:11:11,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425668561] [2021-12-21 18:11:11,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:11,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:11:11,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:11,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:11:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:11:11,951 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:12,271 INFO L93 Difference]: Finished difference Result 262 states and 306 transitions. [2021-12-21 18:11:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:11:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-12-21 18:11:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:12,272 INFO L225 Difference]: With dead ends: 262 [2021-12-21 18:11:12,273 INFO L226 Difference]: Without dead ends: 262 [2021-12-21 18:11:12,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:11:12,273 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 767 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:12,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 374 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:11:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-21 18:11:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 121. [2021-12-21 18:11:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.4343434343434343) internal successors, (142), 113 states have internal predecessors, (142), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2021-12-21 18:11:12,276 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 27 [2021-12-21 18:11:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:12,277 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2021-12-21 18:11:12,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2021-12-21 18:11:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 18:11:12,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:12,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:12,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:12,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:12,484 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1525074233, now seen corresponding path program 1 times [2021-12-21 18:11:12,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:12,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058380659] [2021-12-21 18:11:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:12,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:12,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:12,486 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:12,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-21 18:11:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:12,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 18:11:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:12,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:11:12,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058380659] [2021-12-21 18:11:12,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058380659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:11:12,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:11:12,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:11:12,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839881700] [2021-12-21 18:11:12,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:11:12,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:11:12,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:11:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:11:12,584 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:11:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:12,612 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2021-12-21 18:11:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 18:11:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-21 18:11:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:12,613 INFO L225 Difference]: With dead ends: 141 [2021-12-21 18:11:12,614 INFO L226 Difference]: Without dead ends: 141 [2021-12-21 18:11:12,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:11:12,614 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 28 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:12,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 261 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:11:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-21 18:11:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 118. [2021-12-21 18:11:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 96 states have (on average 1.4166666666666667) internal successors, (136), 111 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2021-12-21 18:11:12,617 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 28 [2021-12-21 18:11:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:12,618 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2021-12-21 18:11:12,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 18:11:12,618 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2021-12-21 18:11:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 18:11:12,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:12,618 INFO L514 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] [2021-12-21 18:11:12,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-21 18:11:12,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:12,825 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:12,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:12,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082728, now seen corresponding path program 1 times [2021-12-21 18:11:12,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:12,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355527930] [2021-12-21 18:11:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:12,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:12,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:12,827 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:12,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-21 18:11:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:12,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 18:11:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 18:11:12,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:11:12,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:12,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355527930] [2021-12-21 18:11:12,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355527930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:11:12,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:11:12,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:11:12,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647677295] [2021-12-21 18:11:12,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:11:12,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:11:12,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:11:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:11:12,944 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:13,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:13,017 INFO L93 Difference]: Finished difference Result 133 states and 153 transitions. [2021-12-21 18:11:13,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:11:13,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-12-21 18:11:13,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:13,018 INFO L225 Difference]: With dead ends: 133 [2021-12-21 18:11:13,018 INFO L226 Difference]: Without dead ends: 133 [2021-12-21 18:11:13,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:11:13,019 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 50 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:13,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 201 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:11:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-21 18:11:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2021-12-21 18:11:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.3604651162790697) internal successors, (117), 101 states have internal predecessors, (117), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2021-12-21 18:11:13,021 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 28 [2021-12-21 18:11:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:13,021 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2021-12-21 18:11:13,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2021-12-21 18:11:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 18:11:13,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:13,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:13,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:13,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:13,222 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1822208300, now seen corresponding path program 2 times [2021-12-21 18:11:13,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:13,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443775169] [2021-12-21 18:11:13,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:11:13,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:13,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:13,224 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:13,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-21 18:11:13,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:11:13,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:11:13,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 18:11:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:13,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:13,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:11:13,977 INFO L387 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 21 treesize of output 21 [2021-12-21 18:11:13,986 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:11:13,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-21 18:11:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:14,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:14,717 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:14,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443775169] [2021-12-21 18:11:14,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443775169] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:11:14,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [123270490] [2021-12-21 18:11:14,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:11:14,718 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:11:14,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:11:14,719 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:11:14,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-12-21 18:11:14,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:11:14,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:11:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 18:11:14,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:14,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:14,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:11:15,296 INFO L387 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 21 treesize of output 21 [2021-12-21 18:11:15,306 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:11:15,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-21 18:11:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:15,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:15,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [123270490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:11:15,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:15,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-12-21 18:11:15,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142404140] [2021-12-21 18:11:15,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:15,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:11:15,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:15,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:11:15,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-12-21 18:11:15,722 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:16,280 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2021-12-21 18:11:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:11:16,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-21 18:11:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:16,282 INFO L225 Difference]: With dead ends: 168 [2021-12-21 18:11:16,282 INFO L226 Difference]: Without dead ends: 168 [2021-12-21 18:11:16,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-12-21 18:11:16,283 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 85 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:16,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 833 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 418 Invalid, 0 Unknown, 190 Unchecked, 0.4s Time] [2021-12-21 18:11:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-21 18:11:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2021-12-21 18:11:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 112 states have internal predecessors, (129), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 18:11:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2021-12-21 18:11:16,285 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 29 [2021-12-21 18:11:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:16,286 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2021-12-21 18:11:16,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2021-12-21 18:11:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:11:16,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:16,286 INFO L514 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] [2021-12-21 18:11:16,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:16,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:16,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-21 18:11:16,693 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:16,694 INFO L85 PathProgramCache]: Analyzing trace with hash -475836742, now seen corresponding path program 1 times [2021-12-21 18:11:16,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:16,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942793014] [2021-12-21 18:11:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:16,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:16,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:16,695 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:16,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-21 18:11:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 18:11:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:16,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:11:16,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:11:16,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:16,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942793014] [2021-12-21 18:11:16,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942793014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:16,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:16,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-21 18:11:16,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954238485] [2021-12-21 18:11:16,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:16,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:11:16,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:11:16,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:11:16,934 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:11:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:17,076 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2021-12-21 18:11:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:11:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-21 18:11:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:17,077 INFO L225 Difference]: With dead ends: 126 [2021-12-21 18:11:17,077 INFO L226 Difference]: Without dead ends: 126 [2021-12-21 18:11:17,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:11:17,077 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 26 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:17,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 275 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-12-21 18:11:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-21 18:11:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-12-21 18:11:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.32) internal successors, (132), 115 states have internal predecessors, (132), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 18:11:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2021-12-21 18:11:17,080 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 31 [2021-12-21 18:11:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:17,080 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2021-12-21 18:11:17,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 18:11:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2021-12-21 18:11:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:11:17,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:17,081 INFO L514 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] [2021-12-21 18:11:17,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-21 18:11:17,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:17,282 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:17,282 INFO L85 PathProgramCache]: Analyzing trace with hash -475836741, now seen corresponding path program 1 times [2021-12-21 18:11:17,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:17,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189232889] [2021-12-21 18:11:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:17,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:17,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:17,284 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:17,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-21 18:11:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 18:11:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:17,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:17,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:18,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189232889] [2021-12-21 18:11:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189232889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:18,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:18,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-12-21 18:11:18,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639298986] [2021-12-21 18:11:18,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:18,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 18:11:18,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 18:11:18,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:11:18,479 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:19,370 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2021-12-21 18:11:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:11:19,371 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2021-12-21 18:11:19,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:19,381 INFO L225 Difference]: With dead ends: 144 [2021-12-21 18:11:19,381 INFO L226 Difference]: Without dead ends: 144 [2021-12-21 18:11:19,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:11:19,382 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 44 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:19,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 584 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 77 Unchecked, 0.7s Time] [2021-12-21 18:11:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-21 18:11:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 124. [2021-12-21 18:11:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.31) internal successors, (131), 115 states have internal predecessors, (131), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 18:11:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2021-12-21 18:11:19,401 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 31 [2021-12-21 18:11:19,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:19,401 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2021-12-21 18:11:19,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2021-12-21 18:11:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:11:19,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:19,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:19,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:19,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:19,610 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:19,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:19,610 INFO L85 PathProgramCache]: Analyzing trace with hash 818465468, now seen corresponding path program 1 times [2021-12-21 18:11:19,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:19,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661546253] [2021-12-21 18:11:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:19,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:19,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:19,612 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:19,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-21 18:11:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:11:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 18:11:19,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:19,783 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:11:19,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 18:11:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 18:11:19,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661546253] [2021-12-21 18:11:19,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661546253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:19,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:19,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-12-21 18:11:19,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476277627] [2021-12-21 18:11:19,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:19,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:11:19,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:19,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:11:19,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:11:19,825 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:20,037 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-12-21 18:11:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:11:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-12-21 18:11:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:20,039 INFO L225 Difference]: With dead ends: 143 [2021-12-21 18:11:20,039 INFO L226 Difference]: Without dead ends: 143 [2021-12-21 18:11:20,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 18:11:20,040 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 82 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:20,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 151 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:11:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-21 18:11:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2021-12-21 18:11:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 105 states have (on average 1.3238095238095238) internal successors, (139), 120 states have internal predecessors, (139), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 18:11:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2021-12-21 18:11:20,043 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 32 [2021-12-21 18:11:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:20,043 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2021-12-21 18:11:20,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2021-12-21 18:11:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:11:20,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:20,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:20,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-21 18:11:20,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:20,252 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:20,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash 818465469, now seen corresponding path program 1 times [2021-12-21 18:11:20,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:20,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43391045] [2021-12-21 18:11:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:20,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:20,254 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:20,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-21 18:11:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:20,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 18:11:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:20,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:20,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:11:20,688 INFO L387 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 25 treesize of output 29 [2021-12-21 18:11:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:21,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43391045] [2021-12-21 18:11:21,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43391045] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:21,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:21,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 18:11:21,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611406927] [2021-12-21 18:11:21,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:21,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:11:21,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:11:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:11:21,141 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 18:11:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:22,744 INFO L93 Difference]: Finished difference Result 280 states and 311 transitions. [2021-12-21 18:11:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:11:22,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-12-21 18:11:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:22,746 INFO L225 Difference]: With dead ends: 280 [2021-12-21 18:11:22,746 INFO L226 Difference]: Without dead ends: 280 [2021-12-21 18:11:22,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:11:22,746 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 325 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:22,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 450 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 18:11:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-21 18:11:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 143. [2021-12-21 18:11:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 132 states have internal predecessors, (164), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 18:11:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 178 transitions. [2021-12-21 18:11:22,750 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 178 transitions. Word has length 32 [2021-12-21 18:11:22,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:22,751 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 178 transitions. [2021-12-21 18:11:22,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 18:11:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 178 transitions. [2021-12-21 18:11:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 18:11:22,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:22,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:22,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:22,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:22,960 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:22,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1191141044, now seen corresponding path program 3 times [2021-12-21 18:11:22,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:22,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115556112] [2021-12-21 18:11:22,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:11:22,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:22,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:22,963 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:22,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-21 18:11:23,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 18:11:23,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:11:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 18:11:23,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:23,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:23,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:11:23,585 INFO L387 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 14 treesize of output 16 [2021-12-21 18:11:23,597 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:11:23,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-21 18:11:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 18:11:23,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:26,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:26,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115556112] [2021-12-21 18:11:26,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115556112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:11:26,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1796610571] [2021-12-21 18:11:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:11:26,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-21 18:11:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-21 18:11:26,270 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-21 18:11:26,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-12-21 18:11:26,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 18:11:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:11:26,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 18:11:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:26,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:26,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:11:26,676 INFO L387 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 14 treesize of output 16 [2021-12-21 18:11:26,683 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:11:26,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-12-21 18:11:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 18:11:26,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:27,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1796610571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:11:27,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:27,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-12-21 18:11:27,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340545446] [2021-12-21 18:11:27,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:27,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:11:27,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:11:27,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=177, Unknown=1, NotChecked=0, Total=210 [2021-12-21 18:11:27,026 INFO L87 Difference]: Start difference. First operand 143 states and 178 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:27,246 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2021-12-21 18:11:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 18:11:27,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-12-21 18:11:27,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:27,248 INFO L225 Difference]: With dead ends: 143 [2021-12-21 18:11:27,248 INFO L226 Difference]: Without dead ends: 143 [2021-12-21 18:11:27,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=51, Invalid=290, Unknown=1, NotChecked=0, Total=342 [2021-12-21 18:11:27,248 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:27,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 444 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2021-12-21 18:11:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-21 18:11:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2021-12-21 18:11:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 115 states have (on average 1.373913043478261) internal successors, (158), 127 states have internal predecessors, (158), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2021-12-21 18:11:27,251 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 32 [2021-12-21 18:11:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:27,251 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2021-12-21 18:11:27,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 18:11:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2021-12-21 18:11:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 18:11:27,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:27,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:27,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:27,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:27,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:27,652 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:27,653 INFO L85 PathProgramCache]: Analyzing trace with hash -397374190, now seen corresponding path program 1 times [2021-12-21 18:11:27,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:27,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828980981] [2021-12-21 18:11:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:27,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:27,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:27,654 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:27,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-21 18:11:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 18:11:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:27,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:11:27,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:11:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:27,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:27,953 INFO L387 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 36 treesize of output 32 [2021-12-21 18:11:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:28,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:28,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828980981] [2021-12-21 18:11:28,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828980981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:28,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:28,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-12-21 18:11:28,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051494418] [2021-12-21 18:11:28,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:28,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:11:28,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:11:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:11:28,103 INFO L87 Difference]: Start difference. First operand 137 states and 169 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:11:28,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:28,594 INFO L93 Difference]: Finished difference Result 214 states and 240 transitions. [2021-12-21 18:11:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:11:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-12-21 18:11:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:28,597 INFO L225 Difference]: With dead ends: 214 [2021-12-21 18:11:28,597 INFO L226 Difference]: Without dead ends: 214 [2021-12-21 18:11:28,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:11:28,600 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 109 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:28,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 644 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 18:11:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-21 18:11:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 146. [2021-12-21 18:11:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 124 states have (on average 1.3790322580645162) internal successors, (171), 136 states have internal predecessors, (171), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2021-12-21 18:11:28,626 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 33 [2021-12-21 18:11:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:28,626 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2021-12-21 18:11:28,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:11:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2021-12-21 18:11:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 18:11:28,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:28,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:28,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:28,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:28,828 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 566302140, now seen corresponding path program 1 times [2021-12-21 18:11:28,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:28,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895441622] [2021-12-21 18:11:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:28,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:28,830 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:28,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-21 18:11:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:28,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 18:11:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:29,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:11:29,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 18:11:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 18:11:29,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:29,381 INFO L387 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 36 treesize of output 32 [2021-12-21 18:11:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:29,699 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:29,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895441622] [2021-12-21 18:11:29,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895441622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:29,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:29,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-12-21 18:11:29,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010211354] [2021-12-21 18:11:29,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:29,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:11:29,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:11:29,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:11:29,700 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:29,941 INFO L93 Difference]: Finished difference Result 181 states and 221 transitions. [2021-12-21 18:11:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:11:29,942 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-12-21 18:11:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:29,942 INFO L225 Difference]: With dead ends: 181 [2021-12-21 18:11:29,943 INFO L226 Difference]: Without dead ends: 179 [2021-12-21 18:11:29,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-12-21 18:11:29,943 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 45 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:29,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 653 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2021-12-21 18:11:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-21 18:11:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 155. [2021-12-21 18:11:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 144 states have internal predecessors, (180), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 191 transitions. [2021-12-21 18:11:29,946 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 191 transitions. Word has length 34 [2021-12-21 18:11:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:29,946 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 191 transitions. [2021-12-21 18:11:29,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 191 transitions. [2021-12-21 18:11:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 18:11:29,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:29,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:29,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:30,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:30,157 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 375497300, now seen corresponding path program 1 times [2021-12-21 18:11:30,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:30,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953092388] [2021-12-21 18:11:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:30,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:30,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:30,159 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:30,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-21 18:11:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 18:11:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:30,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:30,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 18:11:30,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-21 18:11:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:30,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:30,460 INFO L387 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 40 treesize of output 36 [2021-12-21 18:11:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 18:11:30,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:30,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953092388] [2021-12-21 18:11:30,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953092388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:30,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:30,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-12-21 18:11:30,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329045352] [2021-12-21 18:11:30,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:30,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:11:30,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:30,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:11:30,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:11:30,675 INFO L87 Difference]: Start difference. First operand 155 states and 191 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:11:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:30,975 INFO L93 Difference]: Finished difference Result 183 states and 219 transitions. [2021-12-21 18:11:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:11:30,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-12-21 18:11:30,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:30,976 INFO L225 Difference]: With dead ends: 183 [2021-12-21 18:11:30,976 INFO L226 Difference]: Without dead ends: 183 [2021-12-21 18:11:30,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:11:30,977 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 54 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:30,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 349 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2021-12-21 18:11:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-21 18:11:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 150. [2021-12-21 18:11:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 127 states have (on average 1.3700787401574803) internal successors, (174), 139 states have internal predecessors, (174), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 18:11:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2021-12-21 18:11:30,979 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 35 [2021-12-21 18:11:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:30,979 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2021-12-21 18:11:30,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 18:11:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2021-12-21 18:11:30,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:11:30,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:30,980 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:31,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:31,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:31,188 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2027972411, now seen corresponding path program 1 times [2021-12-21 18:11:31,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:31,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718689289] [2021-12-21 18:11:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:31,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:31,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:31,199 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:31,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-21 18:11:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:31,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 18:11:31,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:11:31,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 18:11:31,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:31,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718689289] [2021-12-21 18:11:31,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718689289] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:31,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:31,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-12-21 18:11:31,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13276665] [2021-12-21 18:11:31,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:31,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 18:11:31,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 18:11:31,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-21 18:11:31,635 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-21 18:11:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:32,194 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2021-12-21 18:11:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:11:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2021-12-21 18:11:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:32,196 INFO L225 Difference]: With dead ends: 254 [2021-12-21 18:11:32,196 INFO L226 Difference]: Without dead ends: 254 [2021-12-21 18:11:32,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:11:32,197 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 728 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:32,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 461 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:11:32,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-21 18:11:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 158. [2021-12-21 18:11:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 146 states have internal predecessors, (181), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 18:11:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 195 transitions. [2021-12-21 18:11:32,202 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 195 transitions. Word has length 36 [2021-12-21 18:11:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:32,202 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 195 transitions. [2021-12-21 18:11:32,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-21 18:11:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 195 transitions. [2021-12-21 18:11:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 18:11:32,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:32,203 INFO L514 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] [2021-12-21 18:11:32,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:32,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:32,413 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash -185148971, now seen corresponding path program 1 times [2021-12-21 18:11:32,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:32,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222419021] [2021-12-21 18:11:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:11:32,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:32,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:32,416 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:32,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-21 18:11:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:11:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:11:32,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:11:32,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:11:32,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:32,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222419021] [2021-12-21 18:11:32,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222419021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:32,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:32,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-12-21 18:11:32,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046829811] [2021-12-21 18:11:32,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:32,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 18:11:32,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:32,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 18:11:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:11:32,844 INFO L87 Difference]: Start difference. First operand 158 states and 195 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:11:33,154 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2021-12-21 18:11:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:11:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-12-21 18:11:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:11:33,156 INFO L225 Difference]: With dead ends: 187 [2021-12-21 18:11:33,156 INFO L226 Difference]: Without dead ends: 187 [2021-12-21 18:11:33,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-12-21 18:11:33,157 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 365 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:11:33,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 279 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:11:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-21 18:11:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 155. [2021-12-21 18:11:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 131 states have (on average 1.3206106870229009) internal successors, (173), 143 states have internal predecessors, (173), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-21 18:11:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2021-12-21 18:11:33,161 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 36 [2021-12-21 18:11:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:11:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2021-12-21 18:11:33,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 18:11:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2021-12-21 18:11:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 18:11:33,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:11:33,162 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:11:33,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-21 18:11:33,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 18:11:33,372 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-12-21 18:11:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:11:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1645803514, now seen corresponding path program 3 times [2021-12-21 18:11:33,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 18:11:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694468946] [2021-12-21 18:11:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:11:33,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 18:11:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 18:11:33,382 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 18:11:33,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-21 18:11:33,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 18:11:33,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:11:33,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 18:11:33,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:11:33,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:11:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:34,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:11:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:11:36,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 18:11:36,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694468946] [2021-12-21 18:11:36,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694468946] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:11:36,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:11:36,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-12-21 18:11:36,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13386499] [2021-12-21 18:11:36,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:11:36,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 18:11:36,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 18:11:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 18:11:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:11:36,911 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand has 32 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)