./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/array-memsafety/selectionsort-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:59:35,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:59:35,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:59:35,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:59:35,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:59:35,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:59:35,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:59:35,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:59:35,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:59:35,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:59:35,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:59:35,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:59:35,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:59:35,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:59:35,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:59:35,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:59:35,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:59:35,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:59:35,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:59:35,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:59:35,467 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:59:35,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:59:35,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:59:35,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:59:35,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:59:35,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:59:35,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:59:35,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:59:35,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:59:35,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:59:35,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:59:35,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:59:35,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:59:35,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:59:35,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:59:35,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:59:35,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:59:35,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:59:35,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:59:35,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:59:35,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:59:35,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:59:35,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:59:35,512 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:59:35,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:59:35,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:59:35,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:59:35,513 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:59:35,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:59:35,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:59:35,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:59:35,514 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:59:35,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:59:35,515 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:59:35,515 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:59:35,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:59:35,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:59:35,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:59:35,516 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:59:35,516 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:59:35,516 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:59:35,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:59:35,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:59:35,516 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:59:35,516 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:59:35,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:59:35,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:59:35,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:59:35,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:59:35,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:59:35,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:59:35,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:59:35,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:59:35,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 [2022-07-21 16:59:35,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:59:35,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:59:35,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:59:35,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:59:35,784 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:59:35,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-07-21 16:59:35,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d5399e7/01cd701dfb5d48978809c946044a0bc1/FLAGa70d02a2e [2022-07-21 16:59:36,282 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:59:36,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-07-21 16:59:36,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d5399e7/01cd701dfb5d48978809c946044a0bc1/FLAGa70d02a2e [2022-07-21 16:59:36,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d5399e7/01cd701dfb5d48978809c946044a0bc1 [2022-07-21 16:59:36,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:59:36,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:59:36,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:59:36,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:59:36,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:59:36,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:36" (1/1) ... [2022-07-21 16:59:36,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40778f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:36, skipping insertion in model container [2022-07-21 16:59:36,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:36" (1/1) ... [2022-07-21 16:59:36,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:59:36,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:59:37,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:59:37,072 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-21 16:59:37,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b161446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:37, skipping insertion in model container [2022-07-21 16:59:37,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:59:37,073 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-21 16:59:37,075 INFO L158 Benchmark]: Toolchain (without parser) took 264.19ms. Allocated memory is still 69.2MB. Free memory was 47.5MB in the beginning and 51.2MB in the end (delta: -3.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 16:59:37,076 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 69.2MB. Free memory was 49.5MB in the beginning and 49.5MB in the end (delta: 32.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 16:59:37,077 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.61ms. Allocated memory is still 69.2MB. Free memory was 47.3MB in the beginning and 51.2MB in the end (delta: -3.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 16:59:37,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 69.2MB. Free memory was 49.5MB in the beginning and 49.5MB in the end (delta: 32.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.61ms. Allocated memory is still 69.2MB. Free memory was 47.3MB in the beginning and 51.2MB in the end (delta: -3.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 534]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/array-memsafety/selectionsort-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:59:38,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:59:38,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:59:38,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:59:38,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:59:38,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:59:38,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:59:38,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:59:38,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:59:38,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:59:38,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:59:38,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:59:38,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:59:38,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:59:38,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:59:38,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:59:38,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:59:38,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:59:38,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:59:38,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:59:38,566 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:59:38,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:59:38,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:59:38,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:59:38,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:59:38,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:59:38,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:59:38,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:59:38,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:59:38,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:59:38,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:59:38,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:59:38,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:59:38,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:59:38,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:59:38,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:59:38,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:59:38,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:59:38,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:59:38,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:59:38,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:59:38,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:59:38,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 16:59:38,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:59:38,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:59:38,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:59:38,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:59:38,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:59:38,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:59:38,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:59:38,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:59:38,616 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:59:38,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:59:38,617 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:59:38,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:59:38,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:59:38,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:59:38,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:59:38,618 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:59:38,618 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:59:38,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:59:38,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:59:38,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:59:38,619 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 16:59:38,619 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 16:59:38,619 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:59:38,619 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:59:38,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:59:38,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:59:38,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:59:38,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:59:38,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:59:38,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:59:38,621 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 16:59:38,621 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 16:59:38,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 16:59:38,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 [2022-07-21 16:59:38,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:59:38,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:59:38,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:59:38,892 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:59:38,892 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:59:38,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-07-21 16:59:38,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8613c34cd/bcf2e8e79e5240aa82ea0257db047199/FLAGc35230495 [2022-07-21 16:59:39,337 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:59:39,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-07-21 16:59:39,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8613c34cd/bcf2e8e79e5240aa82ea0257db047199/FLAGc35230495 [2022-07-21 16:59:39,364 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8613c34cd/bcf2e8e79e5240aa82ea0257db047199 [2022-07-21 16:59:39,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:59:39,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:59:39,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:59:39,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:59:39,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:59:39,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2960e988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39, skipping insertion in model container [2022-07-21 16:59:39,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:59:39,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:59:39,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:59:39,657 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 16:59:39,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:59:39,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:59:39,678 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:59:39,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:59:39,714 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:59:39,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39 WrapperNode [2022-07-21 16:59:39,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:59:39,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:59:39,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:59:39,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:59:39,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,757 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-21 16:59:39,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:59:39,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:59:39,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:59:39,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:59:39,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:59:39,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:59:39,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:59:39,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:59:39,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (1/1) ... [2022-07-21 16:59:39,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:59:39,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:59:39,811 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) [2022-07-21 16:59:39,813 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 [2022-07-21 16:59:39,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 16:59:39,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:59:39,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:59:39,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 16:59:39,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:59:39,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:59:39,968 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:59:39,969 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:59:40,211 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:59:40,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:59:40,215 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 16:59:40,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:40 BoogieIcfgContainer [2022-07-21 16:59:40,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:59:40,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:59:40,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:59:40,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:59:40,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:59:39" (1/3) ... [2022-07-21 16:59:40,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300cbc4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:40, skipping insertion in model container [2022-07-21 16:59:40,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:39" (2/3) ... [2022-07-21 16:59:40,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300cbc4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:40, skipping insertion in model container [2022-07-21 16:59:40,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:40" (3/3) ... [2022-07-21 16:59:40,224 INFO L111 eAbstractionObserver]: Analyzing ICFG selectionsort-alloca-1.i [2022-07-21 16:59:40,233 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:59:40,234 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-07-21 16:59:40,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:59:40,272 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44f0fb7c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ccd1ca1 [2022-07-21 16:59:40,272 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-07-21 16:59:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:59:40,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:40,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:59:40,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:40,283 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-21 16:59:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:40,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246087347] [2022-07-21 16:59:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:40,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:40,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:40,293 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) [2022-07-21 16:59:40,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 16:59:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:40,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 16:59:40,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:40,398 INFO L390 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 [2022-07-21 16:59:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:40,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:40,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:40,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246087347] [2022-07-21 16:59:40,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246087347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:40,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:40,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:59:40,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597355089] [2022-07-21 16:59:40,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:40,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:59:40,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:40,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:59:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:59:40,439 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:40,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:40,507 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-07-21 16:59:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:59:40,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 16:59:40,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:40,514 INFO L225 Difference]: With dead ends: 40 [2022-07-21 16:59:40,514 INFO L226 Difference]: Without dead ends: 38 [2022-07-21 16:59:40,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:59:40,517 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:40,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-21 16:59:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-21 16:59:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-21 16:59:40,537 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2022-07-21 16:59:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:40,537 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-21 16:59:40,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-21 16:59:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:59:40,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:40,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:59:40,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 16:59:40,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:40,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-07-21 16:59:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:40,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23025106] [2022-07-21 16:59:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:40,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:40,749 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) [2022-07-21 16:59:40,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 16:59:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 16:59:40,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:40,800 INFO L390 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 [2022-07-21 16:59:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:40,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:40,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23025106] [2022-07-21 16:59:40,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23025106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:40,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:40,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:59:40,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401105826] [2022-07-21 16:59:40,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:40,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:40,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:40,821 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:40,993 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-07-21 16:59:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 16:59:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:40,994 INFO L225 Difference]: With dead ends: 77 [2022-07-21 16:59:40,994 INFO L226 Difference]: Without dead ends: 77 [2022-07-21 16:59:40,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:40,996 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:40,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 145 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:59:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-21 16:59:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2022-07-21 16:59:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-07-21 16:59:41,002 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2022-07-21 16:59:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:41,003 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-07-21 16:59:41,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-07-21 16:59:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:59:41,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:41,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:59:41,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:41,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:41,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-21 16:59:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376997383] [2022-07-21 16:59:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:41,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:41,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:41,213 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) [2022-07-21 16:59:41,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 16:59:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:41,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 16:59:41,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:41,265 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:41,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:41,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:41,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376997383] [2022-07-21 16:59:41,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376997383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:41,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:41,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:59:41,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487823214] [2022-07-21 16:59:41,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:41,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:41,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:41,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:41,325 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:41,352 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-07-21 16:59:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:59:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-21 16:59:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:41,356 INFO L225 Difference]: With dead ends: 43 [2022-07-21 16:59:41,356 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 16:59:41,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:41,360 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:41,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-21 16:59:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 16:59:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-07-21 16:59:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-21 16:59:41,371 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2022-07-21 16:59:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:41,373 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-21 16:59:41,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-21 16:59:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:59:41,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:41,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:41,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:41,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:41,574 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052114, now seen corresponding path program 1 times [2022-07-21 16:59:41,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:41,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997227543] [2022-07-21 16:59:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:41,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:41,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:41,577 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) [2022-07-21 16:59:41,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 16:59:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:41,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 16:59:41,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:41,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:41,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:41,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997227543] [2022-07-21 16:59:41,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997227543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:41,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:41,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:59:41,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794290589] [2022-07-21 16:59:41,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:41,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:41,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:41,635 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:41,664 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-07-21 16:59:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:41,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 16:59:41,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:41,666 INFO L225 Difference]: With dead ends: 44 [2022-07-21 16:59:41,666 INFO L226 Difference]: Without dead ends: 44 [2022-07-21 16:59:41,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:41,667 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:41,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-21 16:59:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-07-21 16:59:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-07-21 16:59:41,670 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2022-07-21 16:59:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:41,670 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-07-21 16:59:41,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-07-21 16:59:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:59:41,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:41,671 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:41,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-21 16:59:41,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:41,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:41,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-07-21 16:59:41,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:41,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822974514] [2022-07-21 16:59:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:41,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:41,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:41,879 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) [2022-07-21 16:59:41,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 16:59:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:41,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 16:59:41,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:41,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:41,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822974514] [2022-07-21 16:59:41,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822974514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:41,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:59:41,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 16:59:41,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171105238] [2022-07-21 16:59:41,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:41,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:59:41,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:59:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:59:41,980 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:42,027 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-07-21 16:59:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:59:42,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:59:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:42,029 INFO L225 Difference]: With dead ends: 75 [2022-07-21 16:59:42,029 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 16:59:42,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:59:42,030 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 71 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:42,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 167 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 16:59:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-07-21 16:59:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-21 16:59:42,033 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2022-07-21 16:59:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:42,033 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-21 16:59:42,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-21 16:59:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:59:42,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:42,034 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:42,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:42,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:42,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:42,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-21 16:59:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:42,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642036164] [2022-07-21 16:59:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:42,245 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) [2022-07-21 16:59:42,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 16:59:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:42,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 16:59:42,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:42,304 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:42,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:42,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:42,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642036164] [2022-07-21 16:59:42,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642036164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:42,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:59:42,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-07-21 16:59:42,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562993705] [2022-07-21 16:59:42,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:42,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:59:42,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:42,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:59:42,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:59:42,780 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:43,121 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-07-21 16:59:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:59:43,122 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-21 16:59:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:43,122 INFO L225 Difference]: With dead ends: 83 [2022-07-21 16:59:43,122 INFO L226 Difference]: Without dead ends: 83 [2022-07-21 16:59:43,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:59:43,123 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:43,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 189 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-07-21 16:59:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-21 16:59:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2022-07-21 16:59:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.5) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-07-21 16:59:43,126 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 10 [2022-07-21 16:59:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:43,126 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-07-21 16:59:43,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-07-21 16:59:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:59:43,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:43,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:43,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:43,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:43,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:43,328 INFO L85 PathProgramCache]: Analyzing trace with hash 363893229, now seen corresponding path program 1 times [2022-07-21 16:59:43,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:43,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821229243] [2022-07-21 16:59:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:43,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:43,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:43,329 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) [2022-07-21 16:59:43,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 16:59:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:43,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 16:59:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:43,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:43,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821229243] [2022-07-21 16:59:43,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821229243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:43,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:43,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:59:43,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288591216] [2022-07-21 16:59:43,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:43,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:59:43,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:43,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:59:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:43,439 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:43,456 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-07-21 16:59:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:59:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:59:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:43,459 INFO L225 Difference]: With dead ends: 62 [2022-07-21 16:59:43,459 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 16:59:43,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:43,460 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:43,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-07-21 16:59:43,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 16:59:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-07-21 16:59:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-07-21 16:59:43,463 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 13 [2022-07-21 16:59:43,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:43,463 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-07-21 16:59:43,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,464 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-07-21 16:59:43,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:59:43,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:43,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:43,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:43,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:43,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:43,671 INFO L85 PathProgramCache]: Analyzing trace with hash 363893953, now seen corresponding path program 1 times [2022-07-21 16:59:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:43,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266158945] [2022-07-21 16:59:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:43,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:43,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:43,673 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) [2022-07-21 16:59:43,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 16:59:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:43,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:59:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:43,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:43,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:43,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266158945] [2022-07-21 16:59:43,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266158945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:43,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:43,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:59:43,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204927149] [2022-07-21 16:59:43,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:43,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:43,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:43,740 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:43,777 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-07-21 16:59:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:59:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:43,778 INFO L225 Difference]: With dead ends: 57 [2022-07-21 16:59:43,778 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 16:59:43,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:43,778 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:43,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:59:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 16:59:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-21 16:59:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.542857142857143) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-21 16:59:43,781 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 13 [2022-07-21 16:59:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:43,781 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-21 16:59:43,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:43,781 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-21 16:59:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:59:43,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:43,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:43,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:43,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:43,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:43,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958531, now seen corresponding path program 1 times [2022-07-21 16:59:43,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:43,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877291400] [2022-07-21 16:59:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:43,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:43,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:43,990 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) [2022-07-21 16:59:43,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 16:59:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 16:59:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:44,041 INFO L390 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 [2022-07-21 16:59:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:44,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:44,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877291400] [2022-07-21 16:59:44,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877291400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:44,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:44,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:59:44,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846311152] [2022-07-21 16:59:44,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:44,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:59:44,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:59:44,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:59:44,062 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:44,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:44,145 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-07-21 16:59:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:59:44,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:59:44,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:44,145 INFO L225 Difference]: With dead ends: 43 [2022-07-21 16:59:44,145 INFO L226 Difference]: Without dead ends: 43 [2022-07-21 16:59:44,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:59:44,146 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:44,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-21 16:59:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-21 16:59:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-07-21 16:59:44,148 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 13 [2022-07-21 16:59:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:44,148 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-07-21 16:59:44,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-07-21 16:59:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:59:44,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:44,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:44,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:44,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:44,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958532, now seen corresponding path program 1 times [2022-07-21 16:59:44,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:44,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716915470] [2022-07-21 16:59:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:44,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:44,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:44,351 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) [2022-07-21 16:59:44,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 16:59:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 16:59:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:44,412 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:44,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:44,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:44,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716915470] [2022-07-21 16:59:44,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716915470] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 16:59:44,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:59:44,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-07-21 16:59:44,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037553366] [2022-07-21 16:59:44,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:44,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:59:44,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:59:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:59:44,811 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:45,092 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-21 16:59:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:59:45,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:59:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:45,098 INFO L225 Difference]: With dead ends: 50 [2022-07-21 16:59:45,098 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 16:59:45,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:59:45,099 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:45,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:59:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 16:59:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-07-21 16:59:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-21 16:59:45,101 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 13 [2022-07-21 16:59:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:45,101 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-21 16:59:45,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:45,101 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-21 16:59:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:59:45,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:45,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:45,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:45,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:45,302 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2022-07-21 16:59:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576101640] [2022-07-21 16:59:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:45,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:45,304 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) [2022-07-21 16:59:45,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 16:59:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:45,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 16:59:45,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:45,356 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:45,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:45,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:45,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576101640] [2022-07-21 16:59:45,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576101640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:45,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:45,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:59:45,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493709803] [2022-07-21 16:59:45,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:45,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:59:45,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:45,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:59:45,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:59:45,477 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:45,695 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-07-21 16:59:45,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:59:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-21 16:59:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:45,696 INFO L225 Difference]: With dead ends: 64 [2022-07-21 16:59:45,696 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 16:59:45,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:59:45,697 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:45,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 46 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-07-21 16:59:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 16:59:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-21 16:59:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.372093023255814) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-07-21 16:59:45,699 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 13 [2022-07-21 16:59:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:45,699 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-07-21 16:59:45,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-07-21 16:59:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:59:45,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:45,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:45,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:45,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:45,900 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2022-07-21 16:59:45,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:45,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930826054] [2022-07-21 16:59:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:45,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:45,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:45,902 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) [2022-07-21 16:59:45,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 16:59:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:45,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 16:59:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:45,959 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:59:46,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:46,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:46,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930826054] [2022-07-21 16:59:46,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930826054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:46,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:46,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:59:46,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733748743] [2022-07-21 16:59:46,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:59:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:59:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:59:46,424 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:46,447 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-07-21 16:59:46,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:59:46,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-21 16:59:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:46,448 INFO L225 Difference]: With dead ends: 51 [2022-07-21 16:59:46,448 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 16:59:46,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:59:46,448 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:46,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2022-07-21 16:59:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 16:59:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 16:59:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-07-21 16:59:46,451 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2022-07-21 16:59:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:46,451 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-07-21 16:59:46,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:46,451 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-07-21 16:59:46,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:59:46,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:46,451 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-07-21 16:59:46,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:46,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:46,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:46,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2022-07-21 16:59:46,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:46,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169291703] [2022-07-21 16:59:46,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:59:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:46,653 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) [2022-07-21 16:59:46,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 16:59:46,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:59:46,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 16:59:46,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:46,725 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:46,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:47,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169291703] [2022-07-21 16:59:47,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169291703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:47,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:59:47,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-21 16:59:47,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642186942] [2022-07-21 16:59:47,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:47,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 16:59:47,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:47,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 16:59:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:59:47,546 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:49,528 INFO L93 Difference]: Finished difference Result 227 states and 270 transitions. [2022-07-21 16:59:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 16:59:49,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:59:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:49,530 INFO L225 Difference]: With dead ends: 227 [2022-07-21 16:59:49,530 INFO L226 Difference]: Without dead ends: 227 [2022-07-21 16:59:49,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:59:49,531 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 431 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:49,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 281 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 305 Invalid, 0 Unknown, 60 Unchecked, 1.1s Time] [2022-07-21 16:59:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-21 16:59:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 67. [2022-07-21 16:59:49,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-07-21 16:59:49,534 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 18 [2022-07-21 16:59:49,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:49,534 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-07-21 16:59:49,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-07-21 16:59:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:59:49,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:49,534 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:49,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:49,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:49,735 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash -511715546, now seen corresponding path program 1 times [2022-07-21 16:59:49,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:49,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249649546] [2022-07-21 16:59:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:49,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:49,736 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) [2022-07-21 16:59:49,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 16:59:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:59:49,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:49,786 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:49,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:59:50,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:50,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249649546] [2022-07-21 16:59:50,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249649546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:50,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:59:50,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-07-21 16:59:50,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021054429] [2022-07-21 16:59:50,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:50,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 16:59:50,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:50,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 16:59:50,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:59:50,801 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:51,492 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-07-21 16:59:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:59:51,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:59:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:51,497 INFO L225 Difference]: With dead ends: 71 [2022-07-21 16:59:51,497 INFO L226 Difference]: Without dead ends: 67 [2022-07-21 16:59:51,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:59:51,498 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:51,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 160 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 73 Unchecked, 0.6s Time] [2022-07-21 16:59:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-21 16:59:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-21 16:59:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 66 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-07-21 16:59:51,500 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 18 [2022-07-21 16:59:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:51,500 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-07-21 16:59:51,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-07-21 16:59:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:59:51,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:51,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:51,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-21 16:59:51,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:51,701 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:51,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1609243625, now seen corresponding path program 2 times [2022-07-21 16:59:51,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:51,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979531086] [2022-07-21 16:59:51,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:59:51,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:51,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:51,703 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) [2022-07-21 16:59:51,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 16:59:51,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:59:51,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:59:51,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:59:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:51,769 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:59:51,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:59:52,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:52,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979531086] [2022-07-21 16:59:52,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979531086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:52,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:59:52,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-21 16:59:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587804989] [2022-07-21 16:59:52,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:52,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 16:59:52,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:52,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 16:59:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:59:52,817 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:56,202 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-07-21 16:59:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:59:56,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-21 16:59:56,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:56,204 INFO L225 Difference]: With dead ends: 151 [2022-07-21 16:59:56,204 INFO L226 Difference]: Without dead ends: 151 [2022-07-21 16:59:56,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2022-07-21 16:59:56,205 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 495 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:56,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 104 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 282 Invalid, 0 Unknown, 37 Unchecked, 1.5s Time] [2022-07-21 16:59:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-21 16:59:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 91. [2022-07-21 16:59:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.380952380952381) internal successors, (116), 90 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2022-07-21 16:59:56,208 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 22 [2022-07-21 16:59:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:56,208 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2022-07-21 16:59:56,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2022-07-21 16:59:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 16:59:56,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:56,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:56,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:56,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:56,416 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1653055190, now seen corresponding path program 1 times [2022-07-21 16:59:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:56,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484637655] [2022-07-21 16:59:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:56,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:56,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:56,418 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:59:56,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 16:59:56,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:56,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 16:59:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:56,488 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:59:57,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:59:57,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484637655] [2022-07-21 16:59:57,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484637655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:57,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:59:57,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-21 16:59:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875688966] [2022-07-21 16:59:57,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:57,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:59:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:59:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:59:57,648 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:57,962 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2022-07-21 16:59:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:59:57,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 16:59:57,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:57,964 INFO L225 Difference]: With dead ends: 95 [2022-07-21 16:59:57,964 INFO L226 Difference]: Without dead ends: 95 [2022-07-21 16:59:57,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:59:57,964 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:57,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 123 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-07-21 16:59:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-21 16:59:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-07-21 16:59:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.3522727272727273) internal successors, (119), 93 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-07-21 16:59:57,966 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 23 [2022-07-21 16:59:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:57,967 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-07-21 16:59:57,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-07-21 16:59:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 16:59:57,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:57,967 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:57,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:58,176 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1651208148, now seen corresponding path program 1 times [2022-07-21 16:59:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:58,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351651395] [2022-07-21 16:59:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:58,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:58,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:58,178 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) [2022-07-21 16:59:58,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 16:59:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 16:59:58,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:59:58,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:59:58,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:58,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351651395] [2022-07-21 16:59:58,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351651395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:59:58,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:59:58,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:59:58,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542359358] [2022-07-21 16:59:58,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:59:58,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:59:58,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:58,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:59:58,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:59:58,302 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:59:58,459 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2022-07-21 16:59:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:59:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-21 16:59:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:59:58,460 INFO L225 Difference]: With dead ends: 132 [2022-07-21 16:59:58,461 INFO L226 Difference]: Without dead ends: 132 [2022-07-21 16:59:58,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:59:58,461 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 92 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:59:58,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 68 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:59:58,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-21 16:59:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 109. [2022-07-21 16:59:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 103 states have (on average 1.3398058252427185) internal successors, (138), 108 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2022-07-21 16:59:58,464 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 23 [2022-07-21 16:59:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:59:58,464 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2022-07-21 16:59:58,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:59:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2022-07-21 16:59:58,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 16:59:58,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:59:58,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:59:58,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 16:59:58,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:59:58,669 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 16:59:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:59:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash 294852956, now seen corresponding path program 1 times [2022-07-21 16:59:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:59:58,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465478661] [2022-07-21 16:59:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:59:58,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:59:58,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:59:58,672 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) [2022-07-21 16:59:58,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 16:59:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:59:58,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 16:59:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:59:58,734 INFO L390 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 8 treesize of output 7 [2022-07-21 16:59:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:59:58,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:59:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:59:59,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:59:59,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465478661] [2022-07-21 16:59:59,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465478661] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:59:59,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:59:59,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-21 16:59:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723331573] [2022-07-21 16:59:59,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:59:59,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:59:59,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:59:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:59:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:59:59,613 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:00,195 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2022-07-21 17:00:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:00:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-21 17:00:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:00,196 INFO L225 Difference]: With dead ends: 109 [2022-07-21 17:00:00,196 INFO L226 Difference]: Without dead ends: 109 [2022-07-21 17:00:00,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:00:00,197 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:00,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 125 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-07-21 17:00:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-21 17:00:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-07-21 17:00:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.34) internal successors, (134), 105 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 134 transitions. [2022-07-21 17:00:00,199 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 134 transitions. Word has length 24 [2022-07-21 17:00:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:00,199 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 134 transitions. [2022-07-21 17:00:00,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 134 transitions. [2022-07-21 17:00:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:00:00,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:00,200 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:00,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:00,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:00,407 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash -623576636, now seen corresponding path program 2 times [2022-07-21 17:00:00,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:00,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683342852] [2022-07-21 17:00:00,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:00,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:00,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:00,408 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) [2022-07-21 17:00:00,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 17:00:00,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:00,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:00:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:00,475 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:01,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:02,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683342852] [2022-07-21 17:00:02,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683342852] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:02,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:02,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-21 17:00:02,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731240133] [2022-07-21 17:00:02,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:02,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 17:00:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:02,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 17:00:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:00:02,338 INFO L87 Difference]: Start difference. First operand 106 states and 134 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:05,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:05,147 INFO L93 Difference]: Finished difference Result 132 states and 167 transitions. [2022-07-21 17:00:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 17:00:05,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-21 17:00:05,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:05,148 INFO L225 Difference]: With dead ends: 132 [2022-07-21 17:00:05,148 INFO L226 Difference]: Without dead ends: 132 [2022-07-21 17:00:05,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-07-21 17:00:05,149 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:05,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 136 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 42 Unchecked, 0.6s Time] [2022-07-21 17:00:05,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-21 17:00:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-07-21 17:00:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.375) internal successors, (165), 125 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2022-07-21 17:00:05,151 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 28 [2022-07-21 17:00:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:05,152 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2022-07-21 17:00:05,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2022-07-21 17:00:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:00:05,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:05,153 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:05,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:05,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:05,360 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:05,360 INFO L85 PathProgramCache]: Analyzing trace with hash -621729594, now seen corresponding path program 1 times [2022-07-21 17:00:05,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:05,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299642719] [2022-07-21 17:00:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:05,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:05,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:05,362 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) [2022-07-21 17:00:05,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 17:00:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:00:05,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:05,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:05,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-21 17:00:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:05,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299642719] [2022-07-21 17:00:05,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299642719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:05,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:05,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-21 17:00:05,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255505921] [2022-07-21 17:00:05,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:05,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:00:05,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:05,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:00:05,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:00:05,961 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:08,157 INFO L93 Difference]: Finished difference Result 245 states and 291 transitions. [2022-07-21 17:00:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 17:00:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-21 17:00:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:08,159 INFO L225 Difference]: With dead ends: 245 [2022-07-21 17:00:08,159 INFO L226 Difference]: Without dead ends: 245 [2022-07-21 17:00:08,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=352, Invalid=838, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 17:00:08,159 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 356 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:08,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 114 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 17:00:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-21 17:00:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 119. [2022-07-21 17:00:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 118 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2022-07-21 17:00:08,162 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 28 [2022-07-21 17:00:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:08,163 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2022-07-21 17:00:08,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2022-07-21 17:00:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 17:00:08,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:08,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:08,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-21 17:00:08,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:08,371 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2143917058, now seen corresponding path program 2 times [2022-07-21 17:00:08,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:08,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610147941] [2022-07-21 17:00:08,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:00:08,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:08,372 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) [2022-07-21 17:00:08,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 17:00:08,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:00:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:08,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:00:08,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:08,441 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:08,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:09,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:09,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610147941] [2022-07-21 17:00:09,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610147941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:09,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:09,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-21 17:00:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695329794] [2022-07-21 17:00:09,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:09,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 17:00:09,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 17:00:09,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:00:09,887 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:11,818 INFO L93 Difference]: Finished difference Result 132 states and 167 transitions. [2022-07-21 17:00:11,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:00:11,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-21 17:00:11,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:11,819 INFO L225 Difference]: With dead ends: 132 [2022-07-21 17:00:11,819 INFO L226 Difference]: Without dead ends: 132 [2022-07-21 17:00:11,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:00:11,821 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:11,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 139 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 45 Unchecked, 0.6s Time] [2022-07-21 17:00:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-21 17:00:11,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2022-07-21 17:00:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 114 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2022-07-21 17:00:11,825 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 29 [2022-07-21 17:00:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:11,825 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2022-07-21 17:00:11,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2022-07-21 17:00:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:00:11,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:11,826 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:11,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-21 17:00:12,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:12,033 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1767402818, now seen corresponding path program 1 times [2022-07-21 17:00:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:12,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77754956] [2022-07-21 17:00:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:12,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:12,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:12,035 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:00:12,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 17:00:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:00:12,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:00:12,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:00:12,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:12,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77754956] [2022-07-21 17:00:12,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77754956] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:00:12,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:00:12,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:00:12,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23576981] [2022-07-21 17:00:12,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:00:12,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:00:12,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:00:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:00:12,233 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:12,237 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2022-07-21 17:00:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:00:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-21 17:00:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:12,241 INFO L225 Difference]: With dead ends: 114 [2022-07-21 17:00:12,241 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 17:00:12,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:00:12,242 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:12,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-07-21 17:00:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 17:00:12,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-21 17:00:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.3457943925233644) internal successors, (144), 111 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2022-07-21 17:00:12,244 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 31 [2022-07-21 17:00:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:12,244 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2022-07-21 17:00:12,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2022-07-21 17:00:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:00:12,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:12,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:12,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-21 17:00:12,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:12,451 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1767403543, now seen corresponding path program 1 times [2022-07-21 17:00:12,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:12,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307894396] [2022-07-21 17:00:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:12,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:12,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:12,453 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) [2022-07-21 17:00:12,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 17:00:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:00:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:12,531 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:13,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:13,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307894396] [2022-07-21 17:00:13,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307894396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:13,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:13,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-21 17:00:13,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389926661] [2022-07-21 17:00:13,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:13,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:00:13,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:00:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:00:13,880 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:15,377 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-07-21 17:00:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:00:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-21 17:00:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:15,379 INFO L225 Difference]: With dead ends: 142 [2022-07-21 17:00:15,379 INFO L226 Difference]: Without dead ends: 142 [2022-07-21 17:00:15,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:00:15,380 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:15,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 86 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-07-21 17:00:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-21 17:00:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2022-07-21 17:00:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.3643410852713178) internal successors, (176), 133 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 176 transitions. [2022-07-21 17:00:15,382 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 176 transitions. Word has length 31 [2022-07-21 17:00:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:15,383 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 176 transitions. [2022-07-21 17:00:15,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 176 transitions. [2022-07-21 17:00:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:00:15,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:15,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:15,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:15,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:15,591 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1767403589, now seen corresponding path program 1 times [2022-07-21 17:00:15,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:15,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665393739] [2022-07-21 17:00:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:15,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:15,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:15,592 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) [2022-07-21 17:00:15,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:00:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:15,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:00:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:15,682 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:16,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:00:17,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:17,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665393739] [2022-07-21 17:00:17,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665393739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:17,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:17,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-07-21 17:00:17,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652383081] [2022-07-21 17:00:17,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:17,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:00:17,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:00:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:00:17,175 INFO L87 Difference]: Start difference. First operand 134 states and 176 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:21,604 INFO L93 Difference]: Finished difference Result 195 states and 238 transitions. [2022-07-21 17:00:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:00:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-21 17:00:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:21,605 INFO L225 Difference]: With dead ends: 195 [2022-07-21 17:00:21,605 INFO L226 Difference]: Without dead ends: 187 [2022-07-21 17:00:21,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:00:21,606 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 650 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:21,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 62 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-21 17:00:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-21 17:00:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2022-07-21 17:00:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.366412213740458) internal successors, (179), 135 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2022-07-21 17:00:21,609 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 31 [2022-07-21 17:00:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:21,609 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2022-07-21 17:00:21,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2022-07-21 17:00:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:00:21,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:21,610 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:21,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-21 17:00:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:21,817 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:21,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash 276218793, now seen corresponding path program 3 times [2022-07-21 17:00:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:21,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046720842] [2022-07-21 17:00:21,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:21,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:21,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:21,819 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) [2022-07-21 17:00:21,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:00:21,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 17:00:21,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:21,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:00:21,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:21,946 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:22,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:24,990 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:24,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046720842] [2022-07-21 17:00:24,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046720842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:24,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:24,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-07-21 17:00:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972412554] [2022-07-21 17:00:24,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:24,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 17:00:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:24,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 17:00:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:00:24,991 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:34,789 INFO L93 Difference]: Finished difference Result 160 states and 201 transitions. [2022-07-21 17:00:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:00:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-21 17:00:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:34,789 INFO L225 Difference]: With dead ends: 160 [2022-07-21 17:00:34,789 INFO L226 Difference]: Without dead ends: 152 [2022-07-21 17:00:34,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=387, Invalid=1419, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 17:00:34,790 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 401 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:34,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 124 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-21 17:00:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-21 17:00:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 141. [2022-07-21 17:00:34,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.3529411764705883) internal successors, (184), 140 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2022-07-21 17:00:34,793 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 32 [2022-07-21 17:00:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:34,793 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2022-07-21 17:00:34,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2022-07-21 17:00:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:00:34,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:34,794 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2022-07-21 17:00:34,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:34,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:34,998 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:34,999 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2022-07-21 17:00:34,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:34,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2265906] [2022-07-21 17:00:34,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:00:34,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:34,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:35,000 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) [2022-07-21 17:00:35,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 17:00:35,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-21 17:00:35,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:00:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:35,116 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:35,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:36,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2265906] [2022-07-21 17:00:36,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2265906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:36,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:36,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-21 17:00:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347902943] [2022-07-21 17:00:36,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:36,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:00:36,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:36,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:00:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:00:36,905 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:45,324 INFO L93 Difference]: Finished difference Result 1339 states and 1808 transitions. [2022-07-21 17:00:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 17:00:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-21 17:00:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:45,329 INFO L225 Difference]: With dead ends: 1339 [2022-07-21 17:00:45,329 INFO L226 Difference]: Without dead ends: 1339 [2022-07-21 17:00:45,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2022-07-21 17:00:45,330 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1565 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:45,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1565 Valid, 624 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 897 Invalid, 0 Unknown, 99 Unchecked, 3.0s Time] [2022-07-21 17:00:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2022-07-21 17:00:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 173. [2022-07-21 17:00:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.3333333333333333) internal successors, (224), 172 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 224 transitions. [2022-07-21 17:00:45,344 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 224 transitions. Word has length 34 [2022-07-21 17:00:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:45,344 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 224 transitions. [2022-07-21 17:00:45,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 224 transitions. [2022-07-21 17:00:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:00:45,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:45,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:45,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:45,547 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash 605983569, now seen corresponding path program 1 times [2022-07-21 17:00:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483713310] [2022-07-21 17:00:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:45,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:45,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:45,549 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) [2022-07-21 17:00:45,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 17:00:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:00:45,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:45,670 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:00:46,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:00:47,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:47,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483713310] [2022-07-21 17:00:47,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483713310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:47,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:47,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-07-21 17:00:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312789028] [2022-07-21 17:00:47,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:00:47,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:00:47,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:00:47,026 INFO L87 Difference]: Start difference. First operand 173 states and 224 transitions. Second operand has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:47,359 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2022-07-21 17:00:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:00:47,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-21 17:00:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:47,361 INFO L225 Difference]: With dead ends: 191 [2022-07-21 17:00:47,361 INFO L226 Difference]: Without dead ends: 191 [2022-07-21 17:00:47,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:00:47,361 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:47,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 134 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-07-21 17:00:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-21 17:00:47,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2022-07-21 17:00:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.3296703296703296) internal successors, (242), 186 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 242 transitions. [2022-07-21 17:00:47,364 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 242 transitions. Word has length 41 [2022-07-21 17:00:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:47,365 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 242 transitions. [2022-07-21 17:00:47,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 242 transitions. [2022-07-21 17:00:47,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:00:47,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:47,365 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:47,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-07-21 17:00:47,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:47,573 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1927265964, now seen corresponding path program 4 times [2022-07-21 17:00:47,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363684454] [2022-07-21 17:00:47,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:00:47,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:47,577 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:00:47,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 17:00:47,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:00:47,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:47,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:00:47,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:47,678 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 17:00:48,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:50,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:50,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363684454] [2022-07-21 17:00:50,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363684454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:50,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:50,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2022-07-21 17:00:50,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129703219] [2022-07-21 17:00:50,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:50,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:00:50,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:00:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-21 17:00:50,487 INFO L87 Difference]: Start difference. First operand 187 states and 242 transitions. Second operand has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:51,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:51,553 INFO L93 Difference]: Finished difference Result 204 states and 261 transitions. [2022-07-21 17:00:51,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:00:51,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-21 17:00:51,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:51,555 INFO L225 Difference]: With dead ends: 204 [2022-07-21 17:00:51,555 INFO L226 Difference]: Without dead ends: 202 [2022-07-21 17:00:51,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:00:51,556 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:51,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 181 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 265 Invalid, 0 Unknown, 58 Unchecked, 0.9s Time] [2022-07-21 17:00:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-21 17:00:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-07-21 17:00:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.317948717948718) internal successors, (257), 199 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 257 transitions. [2022-07-21 17:00:51,558 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 257 transitions. Word has length 41 [2022-07-21 17:00:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:51,558 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 257 transitions. [2022-07-21 17:00:51,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.04) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 257 transitions. [2022-07-21 17:00:51,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:00:51,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:51,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:51,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:51,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:51,759 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1605577749, now seen corresponding path program 1 times [2022-07-21 17:00:51,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:51,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408800064] [2022-07-21 17:00:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:00:51,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:51,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:51,761 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) [2022-07-21 17:00:51,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 17:00:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:00:51,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:00:51,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:51,873 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:00:52,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 17:00:53,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408800064] [2022-07-21 17:00:53,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408800064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:53,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:53,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-07-21 17:00:53,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574141557] [2022-07-21 17:00:53,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:53,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:00:53,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:00:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:00:53,252 INFO L87 Difference]: Start difference. First operand 200 states and 257 transitions. Second operand has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:00:53,480 INFO L93 Difference]: Finished difference Result 207 states and 263 transitions. [2022-07-21 17:00:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:00:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-21 17:00:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:00:53,481 INFO L225 Difference]: With dead ends: 207 [2022-07-21 17:00:53,481 INFO L226 Difference]: Without dead ends: 207 [2022-07-21 17:00:53,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:00:53,482 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:00:53,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 103 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-21 17:00:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-21 17:00:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2022-07-21 17:00:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.317948717948718) internal successors, (257), 199 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 257 transitions. [2022-07-21 17:00:53,485 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 257 transitions. Word has length 42 [2022-07-21 17:00:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:00:53,485 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 257 transitions. [2022-07-21 17:00:53,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:00:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 257 transitions. [2022-07-21 17:00:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:00:53,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:00:53,486 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:00:53,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:00:53,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:00:53,700 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:00:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:00:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1261948553, now seen corresponding path program 5 times [2022-07-21 17:00:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:00:53,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477533930] [2022-07-21 17:00:53,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:00:53,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:00:53,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:00:53,701 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) [2022-07-21 17:00:53,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-21 17:00:53,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-21 17:00:53,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:00:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:00:53,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:00:53,923 INFO L390 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 8 treesize of output 7 [2022-07-21 17:00:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:54,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:00:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:00:59,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:00:59,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477533930] [2022-07-21 17:00:59,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477533930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:00:59,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:00:59,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2022-07-21 17:00:59,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804923967] [2022-07-21 17:00:59,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:00:59,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 17:00:59,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:00:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 17:00:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:00:59,151 INFO L87 Difference]: Start difference. First operand 200 states and 257 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:04,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:01:08,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:01:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:13,526 INFO L93 Difference]: Finished difference Result 320 states and 409 transitions. [2022-07-21 17:01:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 17:01:13,528 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 17:01:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:13,529 INFO L225 Difference]: With dead ends: 320 [2022-07-21 17:01:13,529 INFO L226 Difference]: Without dead ends: 318 [2022-07-21 17:01:13,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 17:01:13,530 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 162 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:13,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 292 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 464 Invalid, 0 Unknown, 237 Unchecked, 5.6s Time] [2022-07-21 17:01:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-21 17:01:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 213. [2022-07-21 17:01:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.3125) internal successors, (273), 212 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 273 transitions. [2022-07-21 17:01:13,535 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 273 transitions. Word has length 45 [2022-07-21 17:01:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:13,535 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 273 transitions. [2022-07-21 17:01:13,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 273 transitions. [2022-07-21 17:01:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:01:13,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:13,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:13,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:13,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:01:13,745 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:01:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash 17747592, now seen corresponding path program 2 times [2022-07-21 17:01:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:01:13,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166362886] [2022-07-21 17:01:13,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:01:13,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:01:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:01:13,747 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) [2022-07-21 17:01:13,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 17:01:13,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:01:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:13,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:01:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:13,882 INFO L390 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 8 treesize of output 7 [2022-07-21 17:01:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 17:01:14,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 17:01:15,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:01:15,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166362886] [2022-07-21 17:01:15,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166362886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:15,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:01:15,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-07-21 17:01:15,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808019395] [2022-07-21 17:01:15,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:15,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:01:15,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:01:15,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:01:15,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:01:15,322 INFO L87 Difference]: Start difference. First operand 213 states and 273 transitions. Second operand has 13 states, 12 states have (on average 5.5) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:16,198 INFO L93 Difference]: Finished difference Result 232 states and 298 transitions. [2022-07-21 17:01:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:01:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.5) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 17:01:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:16,199 INFO L225 Difference]: With dead ends: 232 [2022-07-21 17:01:16,199 INFO L226 Difference]: Without dead ends: 232 [2022-07-21 17:01:16,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:01:16,200 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:16,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 127 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-07-21 17:01:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-21 17:01:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2022-07-21 17:01:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.32) internal successors, (297), 229 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 297 transitions. [2022-07-21 17:01:16,204 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 297 transitions. Word has length 45 [2022-07-21 17:01:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:16,204 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 297 transitions. [2022-07-21 17:01:16,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.5) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 297 transitions. [2022-07-21 17:01:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 17:01:16,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:16,205 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:16,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:01:16,414 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:01:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:16,414 INFO L85 PathProgramCache]: Analyzing trace with hash 17747638, now seen corresponding path program 2 times [2022-07-21 17:01:16,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:01:16,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728447459] [2022-07-21 17:01:16,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:01:16,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:01:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:01:16,416 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) [2022-07-21 17:01:16,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 17:01:16,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:01:16,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:01:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:16,534 INFO L390 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 8 treesize of output 7 [2022-07-21 17:01:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:17,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:19,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:01:19,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728447459] [2022-07-21 17:01:19,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728447459] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:19,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:01:19,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-21 17:01:19,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040513305] [2022-07-21 17:01:19,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:19,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 17:01:19,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:01:19,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 17:01:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:01:19,584 INFO L87 Difference]: Start difference. First operand 230 states and 297 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:29,279 INFO L93 Difference]: Finished difference Result 510 states and 637 transitions. [2022-07-21 17:01:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-21 17:01:29,280 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 17:01:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:29,281 INFO L225 Difference]: With dead ends: 510 [2022-07-21 17:01:29,281 INFO L226 Difference]: Without dead ends: 510 [2022-07-21 17:01:29,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 17:01:29,282 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 576 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:29,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 169 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 681 Invalid, 0 Unknown, 57 Unchecked, 3.4s Time] [2022-07-21 17:01:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-07-21 17:01:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 364. [2022-07-21 17:01:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.317548746518106) internal successors, (473), 363 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 473 transitions. [2022-07-21 17:01:29,290 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 473 transitions. Word has length 45 [2022-07-21 17:01:29,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:29,291 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 473 transitions. [2022-07-21 17:01:29,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 473 transitions. [2022-07-21 17:01:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 17:01:29,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:29,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:29,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-21 17:01:29,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:01:29,500 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:01:29,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash 550176765, now seen corresponding path program 2 times [2022-07-21 17:01:29,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:01:29,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556764748] [2022-07-21 17:01:29,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:01:29,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:01:29,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:01:29,502 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) [2022-07-21 17:01:29,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 17:01:29,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:01:29,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:29,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:01:29,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:29,613 INFO L390 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 8 treesize of output 7 [2022-07-21 17:01:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:30,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:31,854 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:01:31,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556764748] [2022-07-21 17:01:31,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556764748] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:31,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:01:31,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-21 17:01:31,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485383842] [2022-07-21 17:01:31,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:01:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:01:31,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:01:31,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:01:31,855 INFO L87 Difference]: Start difference. First operand 364 states and 473 transitions. Second operand has 21 states, 20 states have (on average 3.7) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:32,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:32,820 INFO L93 Difference]: Finished difference Result 381 states and 486 transitions. [2022-07-21 17:01:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:01:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-21 17:01:32,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:32,822 INFO L225 Difference]: With dead ends: 381 [2022-07-21 17:01:32,822 INFO L226 Difference]: Without dead ends: 381 [2022-07-21 17:01:32,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:01:32,822 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:32,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 158 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-07-21 17:01:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-07-21 17:01:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 360. [2022-07-21 17:01:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.3183098591549296) internal successors, (468), 359 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 468 transitions. [2022-07-21 17:01:32,826 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 468 transitions. Word has length 46 [2022-07-21 17:01:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:32,826 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 468 transitions. [2022-07-21 17:01:32,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 468 transitions. [2022-07-21 17:01:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 17:01:32,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:32,827 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:32,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:01:33,035 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:01:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -124433175, now seen corresponding path program 2 times [2022-07-21 17:01:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:01:33,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900195088] [2022-07-21 17:01:33,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:01:33,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:01:33,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:01:33,037 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) [2022-07-21 17:01:33,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-21 17:01:33,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:01:33,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:01:33,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:33,148 INFO L390 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 8 treesize of output 7 [2022-07-21 17:01:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:34,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 17:01:35,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:01:35,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900195088] [2022-07-21 17:01:35,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900195088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:35,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:01:35,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-21 17:01:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100058731] [2022-07-21 17:01:35,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:35,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:01:35,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:01:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:01:35,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:01:35,734 INFO L87 Difference]: Start difference. First operand 360 states and 468 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:01:36,724 INFO L93 Difference]: Finished difference Result 376 states and 480 transitions. [2022-07-21 17:01:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 17:01:36,725 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-21 17:01:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:01:36,726 INFO L225 Difference]: With dead ends: 376 [2022-07-21 17:01:36,726 INFO L226 Difference]: Without dead ends: 376 [2022-07-21 17:01:36,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:01:36,727 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:01:36,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 180 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-07-21 17:01:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-07-21 17:01:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 351. [2022-07-21 17:01:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.3150289017341041) internal successors, (455), 350 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 455 transitions. [2022-07-21 17:01:36,732 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 455 transitions. Word has length 47 [2022-07-21 17:01:36,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:01:36,732 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 455 transitions. [2022-07-21 17:01:36,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 455 transitions. [2022-07-21 17:01:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:01:36,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:01:36,733 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:01:36,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:01:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:01:36,941 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:01:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:01:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash 387622886, now seen corresponding path program 6 times [2022-07-21 17:01:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:01:36,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144055653] [2022-07-21 17:01:36,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:01:36,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:01:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:01:36,943 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:01:36,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 17:01:37,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 17:01:37,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:01:37,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:01:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:01:37,129 INFO L390 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 8 treesize of output 7 [2022-07-21 17:01:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:01:37,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:01:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:01:40,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:01:40,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144055653] [2022-07-21 17:01:40,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144055653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:01:40,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:01:40,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-21 17:01:40,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666794477] [2022-07-21 17:01:40,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:01:40,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:01:40,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:01:40,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:01:40,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:01:40,178 INFO L87 Difference]: Start difference. First operand 351 states and 455 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:01:49,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:02:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:00,484 INFO L93 Difference]: Finished difference Result 591 states and 743 transitions. [2022-07-21 17:02:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-21 17:02:00,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-21 17:02:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:00,487 INFO L225 Difference]: With dead ends: 591 [2022-07-21 17:02:00,487 INFO L226 Difference]: Without dead ends: 591 [2022-07-21 17:02:00,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1056, Invalid=3104, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 17:02:00,488 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 536 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:00,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 176 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 635 Invalid, 0 Unknown, 53 Unchecked, 5.4s Time] [2022-07-21 17:02:00,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-07-21 17:02:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 454. [2022-07-21 17:02:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 449 states have (on average 1.3474387527839644) internal successors, (605), 453 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 605 transitions. [2022-07-21 17:02:00,506 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 605 transitions. Word has length 49 [2022-07-21 17:02:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:00,506 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 605 transitions. [2022-07-21 17:02:00,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 605 transitions. [2022-07-21 17:02:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:02:00,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:00,507 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:00,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:00,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:02:00,716 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:02:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:00,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2146511183, now seen corresponding path program 2 times [2022-07-21 17:02:00,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:02:00,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213675196] [2022-07-21 17:02:00,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:02:00,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:02:00,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:02:00,718 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:02:00,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 17:02:00,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:02:00,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:02:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:00,855 INFO L390 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 8 treesize of output 7 [2022-07-21 17:02:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:02:01,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 17:02:03,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:02:03,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213675196] [2022-07-21 17:02:03,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213675196] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:03,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:02:03,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-07-21 17:02:03,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987166748] [2022-07-21 17:02:03,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:03,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:02:03,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:02:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:02:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:02:03,805 INFO L87 Difference]: Start difference. First operand 454 states and 605 transitions. Second operand has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:11,277 INFO L93 Difference]: Finished difference Result 611 states and 793 transitions. [2022-07-21 17:02:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 17:02:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-21 17:02:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:11,279 INFO L225 Difference]: With dead ends: 611 [2022-07-21 17:02:11,280 INFO L226 Difference]: Without dead ends: 611 [2022-07-21 17:02:11,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=428, Invalid=1642, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 17:02:11,280 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:11,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 174 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 115 Invalid, 0 Unknown, 46 Unchecked, 1.3s Time] [2022-07-21 17:02:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-07-21 17:02:11,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 511. [2022-07-21 17:02:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 506 states have (on average 1.3537549407114624) internal successors, (685), 510 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 685 transitions. [2022-07-21 17:02:11,285 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 685 transitions. Word has length 50 [2022-07-21 17:02:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:11,285 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 685 transitions. [2022-07-21 17:02:11,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.3) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 685 transitions. [2022-07-21 17:02:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 17:02:11,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:11,286 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:11,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-21 17:02:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:02:11,486 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:02:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1195941585, now seen corresponding path program 3 times [2022-07-21 17:02:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:02:11,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251806879] [2022-07-21 17:02:11,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:11,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:02:11,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:02:11,488 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:02:11,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-21 17:02:11,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 17:02:11,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:11,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:02:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:11,598 INFO L390 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 8 treesize of output 7 [2022-07-21 17:02:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 17:02:12,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 17:02:12,493 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:02:12,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251806879] [2022-07-21 17:02:12,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251806879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:12,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:02:12,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2022-07-21 17:02:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421575832] [2022-07-21 17:02:12,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:12,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:02:12,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:02:12,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:02:12,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:02:12,496 INFO L87 Difference]: Start difference. First operand 511 states and 685 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:12,577 INFO L93 Difference]: Finished difference Result 590 states and 765 transitions. [2022-07-21 17:02:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:02:12,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-21 17:02:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:12,578 INFO L225 Difference]: With dead ends: 590 [2022-07-21 17:02:12,579 INFO L226 Difference]: Without dead ends: 590 [2022-07-21 17:02:12,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:02:12,579 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:12,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-07-21 17:02:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-07-21 17:02:12,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 478. [2022-07-21 17:02:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 473 states have (on average 1.3298097251585623) internal successors, (629), 477 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 629 transitions. [2022-07-21 17:02:12,584 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 629 transitions. Word has length 51 [2022-07-21 17:02:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:12,584 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 629 transitions. [2022-07-21 17:02:12,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:12,584 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 629 transitions. [2022-07-21 17:02:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:02:12,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:12,587 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:12,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:12,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:02:12,795 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:02:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:12,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1580560235, now seen corresponding path program 3 times [2022-07-21 17:02:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:02:12,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869607728] [2022-07-21 17:02:12,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:12,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:02:12,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:02:12,797 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:02:12,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-21 17:02:12,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 17:02:12,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:12,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:02:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:12,895 INFO L390 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 8 treesize of output 7 [2022-07-21 17:02:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-21 17:02:13,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:02:13,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:02:13,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869607728] [2022-07-21 17:02:13,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869607728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:02:13,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:02:13,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:02:13,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874976939] [2022-07-21 17:02:13,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:02:13,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 17:02:13,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:02:13,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 17:02:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:02:13,326 INFO L87 Difference]: Start difference. First operand 478 states and 629 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:13,392 INFO L93 Difference]: Finished difference Result 567 states and 736 transitions. [2022-07-21 17:02:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:02:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-21 17:02:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:13,394 INFO L225 Difference]: With dead ends: 567 [2022-07-21 17:02:13,394 INFO L226 Difference]: Without dead ends: 567 [2022-07-21 17:02:13,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:02:13,394 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:13,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 65 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-07-21 17:02:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-07-21 17:02:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 344. [2022-07-21 17:02:13,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.2920353982300885) internal successors, (438), 343 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 438 transitions. [2022-07-21 17:02:13,401 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 438 transitions. Word has length 52 [2022-07-21 17:02:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:13,401 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 438 transitions. [2022-07-21 17:02:13,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 438 transitions. [2022-07-21 17:02:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:02:13,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:13,402 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:13,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:02:13,608 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:02:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 558307894, now seen corresponding path program 3 times [2022-07-21 17:02:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:02:13,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537589743] [2022-07-21 17:02:13,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:13,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:02:13,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:02:13,610 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:02:13,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-21 17:02:13,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 17:02:13,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:02:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:13,942 INFO L390 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 8 treesize of output 7 [2022-07-21 17:02:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:02:14,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:02:17,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:02:17,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537589743] [2022-07-21 17:02:17,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537589743] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:17,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:02:17,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-07-21 17:02:17,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939841550] [2022-07-21 17:02:17,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:17,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 17:02:17,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:02:17,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 17:02:17,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:02:17,247 INFO L87 Difference]: Start difference. First operand 344 states and 438 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:19,025 INFO L93 Difference]: Finished difference Result 435 states and 551 transitions. [2022-07-21 17:02:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:02:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-21 17:02:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:19,027 INFO L225 Difference]: With dead ends: 435 [2022-07-21 17:02:19,027 INFO L226 Difference]: Without dead ends: 434 [2022-07-21 17:02:19,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 17:02:19,028 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:19,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 161 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 225 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2022-07-21 17:02:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-21 17:02:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 431. [2022-07-21 17:02:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 426 states have (on average 1.2863849765258215) internal successors, (548), 430 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 548 transitions. [2022-07-21 17:02:19,032 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 548 transitions. Word has length 55 [2022-07-21 17:02:19,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:19,032 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 548 transitions. [2022-07-21 17:02:19,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 548 transitions. [2022-07-21 17:02:19,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 17:02:19,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:19,033 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:19,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-21 17:02:19,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:02:19,244 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:02:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1694913281, now seen corresponding path program 3 times [2022-07-21 17:02:19,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:02:19,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336621427] [2022-07-21 17:02:19,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:02:19,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:02:19,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:02:19,245 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:02:19,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-21 17:02:19,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-07-21 17:02:19,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:19,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:02:19,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-21 17:02:19,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:02:19,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:02:19,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336621427] [2022-07-21 17:02:19,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336621427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:02:19,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:02:19,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:02:19,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070289418] [2022-07-21 17:02:19,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:02:19,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:02:19,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:02:19,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:02:19,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:02:19,513 INFO L87 Difference]: Start difference. First operand 431 states and 548 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:19,588 INFO L93 Difference]: Finished difference Result 432 states and 537 transitions. [2022-07-21 17:02:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:02:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-21 17:02:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:19,590 INFO L225 Difference]: With dead ends: 432 [2022-07-21 17:02:19,590 INFO L226 Difference]: Without dead ends: 432 [2022-07-21 17:02:19,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:02:19,590 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:19,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:02:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-21 17:02:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 427. [2022-07-21 17:02:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 423 states have (on average 1.2576832151300237) internal successors, (532), 426 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 532 transitions. [2022-07-21 17:02:19,595 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 532 transitions. Word has length 58 [2022-07-21 17:02:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:19,595 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 532 transitions. [2022-07-21 17:02:19,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 532 transitions. [2022-07-21 17:02:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 17:02:19,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:19,596 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:19,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-21 17:02:19,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:02:19,802 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:02:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1970979329, now seen corresponding path program 4 times [2022-07-21 17:02:19,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:02:19,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815084918] [2022-07-21 17:02:19,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:02:19,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:02:19,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:02:19,804 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:02:19,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-21 17:02:19,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:02:19,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:19,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:02:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:19,966 INFO L390 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 8 treesize of output 7 [2022-07-21 17:02:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:02:20,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 58 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:02:23,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:02:23,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815084918] [2022-07-21 17:02:23,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815084918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:23,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:02:23,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-07-21 17:02:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592489937] [2022-07-21 17:02:23,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:23,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 17:02:23,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:02:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 17:02:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:02:23,278 INFO L87 Difference]: Start difference. First operand 427 states and 532 transitions. Second operand has 26 states, 25 states have (on average 3.68) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:02:33,761 INFO L93 Difference]: Finished difference Result 598 states and 733 transitions. [2022-07-21 17:02:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-21 17:02:33,763 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-21 17:02:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:02:33,764 INFO L225 Difference]: With dead ends: 598 [2022-07-21 17:02:33,764 INFO L226 Difference]: Without dead ends: 598 [2022-07-21 17:02:33,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1197, Invalid=3359, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 17:02:33,766 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 608 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:02:33,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 186 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 666 Invalid, 0 Unknown, 90 Unchecked, 2.7s Time] [2022-07-21 17:02:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-07-21 17:02:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 507. [2022-07-21 17:02:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 503 states have (on average 1.260437375745527) internal successors, (634), 506 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 634 transitions. [2022-07-21 17:02:33,770 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 634 transitions. Word has length 59 [2022-07-21 17:02:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:02:33,770 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 634 transitions. [2022-07-21 17:02:33,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.68) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:02:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 634 transitions. [2022-07-21 17:02:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:02:33,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:02:33,771 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:02:33,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-07-21 17:02:33,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:02:33,972 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:02:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:02:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash -412330512, now seen corresponding path program 5 times [2022-07-21 17:02:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:02:33,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334852184] [2022-07-21 17:02:33,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:02:33,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:02:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:02:33,973 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:02:33,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-21 17:02:34,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 17:02:34,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:02:34,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 17:02:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:02:34,581 INFO L390 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 8 treesize of output 7 [2022-07-21 17:02:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 39 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 17:02:35,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:02:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 85 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:02:38,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:02:38,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334852184] [2022-07-21 17:02:38,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334852184] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:02:38,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:02:38,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 28 [2022-07-21 17:02:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000029263] [2022-07-21 17:02:38,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:02:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 17:02:38,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:02:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 17:02:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-07-21 17:02:38,485 INFO L87 Difference]: Start difference. First operand 507 states and 634 transitions. Second operand has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:03:01,622 INFO L93 Difference]: Finished difference Result 565 states and 687 transitions. [2022-07-21 17:03:01,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-21 17:03:01,623 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-21 17:03:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:03:01,624 INFO L225 Difference]: With dead ends: 565 [2022-07-21 17:03:01,624 INFO L226 Difference]: Without dead ends: 565 [2022-07-21 17:03:01,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1133, Invalid=6007, Unknown=0, NotChecked=0, Total=7140 [2022-07-21 17:03:01,626 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 905 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:03:01,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 364 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-07-21 17:03:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-07-21 17:03:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 457. [2022-07-21 17:03:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 453 states have (on average 1.2582781456953642) internal successors, (570), 456 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 570 transitions. [2022-07-21 17:03:01,636 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 570 transitions. Word has length 63 [2022-07-21 17:03:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:03:01,636 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 570 transitions. [2022-07-21 17:03:01,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.892857142857143) internal successors, (109), 28 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 570 transitions. [2022-07-21 17:03:01,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 17:03:01,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:03:01,637 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2022-07-21 17:03:01,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-21 17:03:01,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:03:01,848 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:03:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:03:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2022-07-21 17:03:01,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:03:01,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066008234] [2022-07-21 17:03:01,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:03:01,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:03:01,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:03:01,850 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:03:01,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-21 17:03:01,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:03:01,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:03:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:03:01,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:03:01,971 INFO L390 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 8 treesize of output 7 [2022-07-21 17:03:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:03,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:03:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:03:10,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:03:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066008234] [2022-07-21 17:03:10,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066008234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:03:10,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:03:10,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2022-07-21 17:03:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574906528] [2022-07-21 17:03:10,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:03:10,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 17:03:10,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:03:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 17:03:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 17:03:10,828 INFO L87 Difference]: Start difference. First operand 457 states and 570 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:03:21,088 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 17:03:24,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:03:26,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:03:28,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:03:37,559 WARN L233 SmtUtils]: Spent 8.96s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 17:03:51,516 WARN L233 SmtUtils]: Spent 13.44s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 17:03:53,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:03:55,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:03:57,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:03:59,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:04:07,254 WARN L233 SmtUtils]: Spent 7.60s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)