./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/array03-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c 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/array03-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:17:42,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:17:42,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:17:42,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:17:42,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:17:42,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:17:42,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:17:42,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:17:42,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:17:42,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:17:42,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:17:42,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:17:42,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:17:42,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:17:42,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:17:42,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:17:42,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:17:42,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:17:42,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:17:42,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:17:42,069 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:17:42,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:17:42,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:17:42,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:17:42,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:17:42,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:17:42,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:17:42,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:17:42,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:17:42,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:17:42,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:17:42,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:17:42,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:17:42,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:17:42,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:17:42,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:17:42,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:17:42,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:17:42,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:17:42,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:17:42,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:17:42,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:17:42,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:17:42,108 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:17:42,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:17:42,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:17:42,108 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:17:42,109 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:17:42,109 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:17:42,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:17:42,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:17:42,110 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:17:42,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:17:42,110 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:17:42,110 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:17:42,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:17:42,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:17:42,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:17:42,111 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:17:42,111 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:17:42,111 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:17:42,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:17:42,112 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:17:42,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:17:42,113 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:17:42,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:17:42,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:17:42,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:17:42,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:17:42,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:17:42,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:17:42,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:17:42,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:17:42,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2022-07-12 18:17:42,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:17:42,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:17:42,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:17:42,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:17:42,316 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:17:42,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2022-07-12 18:17:42,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c0dcab0e/7a0b58c5161043eeaa092933e8ba0ec9/FLAG899706fa5 [2022-07-12 18:17:42,767 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:17:42,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2022-07-12 18:17:42,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c0dcab0e/7a0b58c5161043eeaa092933e8ba0ec9/FLAG899706fa5 [2022-07-12 18:17:42,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c0dcab0e/7a0b58c5161043eeaa092933e8ba0ec9 [2022-07-12 18:17:42,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:17:42,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:17:42,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:17:42,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:17:42,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:17:42,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:17:42" (1/1) ... [2022-07-12 18:17:42,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@223e4e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:42, skipping insertion in model container [2022-07-12 18:17:42,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:17:42" (1/1) ... [2022-07-12 18:17:42,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:17:42,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:17:43,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:17:43,019 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) [2022-07-12 18:17:43,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f939096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:43, skipping insertion in model container [2022-07-12 18:17:43,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:17:43,019 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:17:43,021 INFO L158 Benchmark]: Toolchain (without parser) took 232.74ms. Allocated memory is still 104.9MB. Free memory was 75.2MB in the beginning and 76.9MB in the end (delta: -1.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 18:17:43,021 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 104.9MB. Free memory is still 62.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:17:43,021 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.57ms. Allocated memory is still 104.9MB. Free memory was 74.9MB in the beginning and 77.2MB in the end (delta: -2.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-12 18:17:43,022 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 104.9MB. Free memory is still 62.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.57ms. Allocated memory is still 104.9MB. Free memory was 74.9MB in the beginning and 77.2MB in the end (delta: -2.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 535]: 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/array03-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:17:44,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:17:44,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:17:44,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:17:44,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:17:44,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:17:44,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:17:44,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:17:44,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:17:44,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:17:44,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:17:44,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:17:44,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:17:44,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:17:44,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:17:44,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:17:44,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:17:44,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:17:44,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:17:44,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:17:44,531 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:17:44,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:17:44,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:17:44,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:17:44,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:17:44,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:17:44,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:17:44,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:17:44,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:17:44,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:17:44,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:17:44,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:17:44,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:17:44,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:17:44,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:17:44,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:17:44,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:17:44,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:17:44,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:17:44,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:17:44,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:17:44,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:17:44,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:17:44,582 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:17:44,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:17:44,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:17:44,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:17:44,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:17:44,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:17:44,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:17:44,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:17:44,587 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:17:44,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:17:44,588 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:17:44,588 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:17:44,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:17:44,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:17:44,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:17:44,589 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:17:44,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:17:44,589 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:17:44,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:17:44,589 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:17:44,590 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:17:44,590 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:17:44,590 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:17:44,590 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:17:44,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:17:44,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:17:44,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:17:44,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:17:44,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:17:44,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:17:44,592 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:17:44,592 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:17:44,592 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:17:44,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2022-07-12 18:17:44,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:17:44,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:17:44,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:17:44,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:17:44,890 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:17:44,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2022-07-12 18:17:44,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69ad3ed3/6cb86166412649bfbbcbf58aff91f28d/FLAGfcd35012b [2022-07-12 18:17:45,301 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:17:45,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2022-07-12 18:17:45,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69ad3ed3/6cb86166412649bfbbcbf58aff91f28d/FLAGfcd35012b [2022-07-12 18:17:45,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b69ad3ed3/6cb86166412649bfbbcbf58aff91f28d [2022-07-12 18:17:45,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:17:45,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:17:45,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:17:45,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:17:45,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:17:45,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d65c8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45, skipping insertion in model container [2022-07-12 18:17:45,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:17:45,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:17:45,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:17:45,622 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:17:45,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:17:45,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:17:45,666 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:17:45,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:17:45,728 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:17:45,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45 WrapperNode [2022-07-12 18:17:45,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:17:45,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:17:45,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:17:45,731 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:17:45,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,781 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-07-12 18:17:45,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:17:45,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:17:45,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:17:45,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:17:45,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:17:45,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:17:45,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:17:45,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:17:45,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (1/1) ... [2022-07-12 18:17:45,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:17:45,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:17:45,861 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) [2022-07-12 18:17:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-12 18:17:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:17:45,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:17:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-12 18:17:45,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:17:45,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:17:45,879 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 [2022-07-12 18:17:46,018 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:17:46,019 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:17:46,272 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:17:46,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:17:46,276 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 18:17:46,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:17:46 BoogieIcfgContainer [2022-07-12 18:17:46,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:17:46,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:17:46,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:17:46,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:17:46,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:17:45" (1/3) ... [2022-07-12 18:17:46,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d12926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:17:46, skipping insertion in model container [2022-07-12 18:17:46,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:17:45" (2/3) ... [2022-07-12 18:17:46,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d12926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:17:46, skipping insertion in model container [2022-07-12 18:17:46,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:17:46" (3/3) ... [2022-07-12 18:17:46,283 INFO L111 eAbstractionObserver]: Analyzing ICFG array03-alloca-2.i [2022-07-12 18:17:46,292 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:17:46,292 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-07-12 18:17:46,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:17:46,327 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@807ca64, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@722e97e7 [2022-07-12 18:17:46,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-07-12 18:17:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:17:46,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:46,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:17:46,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-12 18:17:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:46,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314794841] [2022-07-12 18:17:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:46,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:46,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:46,350 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) [2022-07-12 18:17:46,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:17:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:17:46,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:46,456 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 [2022-07-12 18:17:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:46,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:46,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314794841] [2022-07-12 18:17:46,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314794841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:46,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:46,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:17:46,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591712920] [2022-07-12 18:17:46,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:46,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:17:46,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:17:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:17:46,496 INFO L87 Difference]: Start difference. First operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 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) [2022-07-12 18:17:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:46,644 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-07-12 18:17:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:17:46,647 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 [2022-07-12 18:17:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:46,654 INFO L225 Difference]: With dead ends: 44 [2022-07-12 18:17:46,654 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 18:17:46,655 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 [2022-07-12 18:17:46,659 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:46,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:46,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 18:17:46,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-12 18:17:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.8076923076923077) 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) [2022-07-12 18:17:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-07-12 18:17:46,679 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2022-07-12 18:17:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:46,680 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-07-12 18:17:46,680 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) [2022-07-12 18:17:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-07-12 18:17:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:17:46,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:46,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:17:46,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:46,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:46,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-07-12 18:17:46,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:46,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984904322] [2022-07-12 18:17:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:46,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:46,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:46,890 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) [2022-07-12 18:17:46,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:17:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:46,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:17:46,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:46,941 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 [2022-07-12 18:17:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:46,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:46,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:46,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984904322] [2022-07-12 18:17:46,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984904322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:46,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:46,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:46,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927883730] [2022-07-12 18:17:46,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:46,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:46,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:46,982 INFO L87 Difference]: Start difference. First operand 42 states and 47 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) [2022-07-12 18:17:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,221 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-07-12 18:17:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:47,222 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 [2022-07-12 18:17:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,223 INFO L225 Difference]: With dead ends: 85 [2022-07-12 18:17:47,223 INFO L226 Difference]: Without dead ends: 85 [2022-07-12 18:17:47,223 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 [2022-07-12 18:17:47,224 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 48 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 166 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:17:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-12 18:17:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 45. [2022-07-12 18:17:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 44 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) [2022-07-12 18:17:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-07-12 18:17:47,229 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 6 [2022-07-12 18:17:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,229 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-07-12 18:17:47,229 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) [2022-07-12 18:17:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-07-12 18:17:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:17:47,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:47,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:47,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-12 18:17:47,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:47,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081413688] [2022-07-12 18:17:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:47,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:47,432 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) [2022-07-12 18:17:47,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:17:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:17:47,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:47,494 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 [2022-07-12 18:17:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:47,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:47,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:47,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081413688] [2022-07-12 18:17:47,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081413688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:47,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:47,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:47,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813815404] [2022-07-12 18:17:47,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:47,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:47,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:47,542 INFO L87 Difference]: Start difference. First operand 45 states and 50 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) [2022-07-12 18:17:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,575 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-07-12 18:17:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:47,576 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 [2022-07-12 18:17:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,577 INFO L225 Difference]: With dead ends: 47 [2022-07-12 18:17:47,579 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 18:17:47,579 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 [2022-07-12 18:17:47,580 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 107 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-07-12 18:17:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 18:17:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-12 18:17:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 45 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) [2022-07-12 18:17:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-12 18:17:47,590 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 6 [2022-07-12 18:17:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,590 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-12 18:17:47,590 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) [2022-07-12 18:17:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-12 18:17:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:17:47,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:47,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:47,797 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:47,798 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2022-07-12 18:17:47,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:47,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550594943] [2022-07-12 18:17:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:47,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:47,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:47,800 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) [2022-07-12 18:17:47,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:17:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:17:47,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:47,851 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 [2022-07-12 18:17:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:47,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:47,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550594943] [2022-07-12 18:17:47,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550594943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:47,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:47,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:17:47,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343859055] [2022-07-12 18:17:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:47,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:47,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:47,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:47,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:47,873 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:47,969 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-07-12 18:17:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:17:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:47,971 INFO L225 Difference]: With dead ends: 39 [2022-07-12 18:17:47,971 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 18:17:47,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:47,971 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:47,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 18:17:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-12 18:17:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.5) internal successors, (45), 38 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) [2022-07-12 18:17:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-07-12 18:17:47,974 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 8 [2022-07-12 18:17:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:47,974 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-07-12 18:17:47,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-07-12 18:17:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 18:17:47,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:47,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:47,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:48,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:48,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2022-07-12 18:17:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:48,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528774352] [2022-07-12 18:17:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:48,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:48,178 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) [2022-07-12 18:17:48,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 18:17:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:17:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:48,246 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 [2022-07-12 18:17:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:48,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:48,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:48,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528774352] [2022-07-12 18:17:48,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528774352] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:48,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:48,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152705928] [2022-07-12 18:17:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:48,340 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:48,361 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-07-12 18:17:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:17:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-12 18:17:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:48,362 INFO L225 Difference]: With dead ends: 42 [2022-07-12 18:17:48,362 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 18:17:48,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:17:48,364 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:48,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-07-12 18:17:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 18:17:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-12 18:17:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-07-12 18:17:48,376 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 8 [2022-07-12 18:17:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:48,376 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-07-12 18:17:48,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:48,377 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-07-12 18:17:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 18:17:48,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:48,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:48,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:48,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:48,583 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052370, now seen corresponding path program 1 times [2022-07-12 18:17:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968632958] [2022-07-12 18:17:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:48,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:48,585 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) [2022-07-12 18:17:48,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:17:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:48,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:17:48,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:48,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:48,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:48,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968632958] [2022-07-12 18:17:48,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968632958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:48,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:48,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:48,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057506117] [2022-07-12 18:17:48,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:48,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:48,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:48,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:48,648 INFO L87 Difference]: Start difference. First operand 42 states and 49 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) [2022-07-12 18:17:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:48,675 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-12 18:17:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:48,676 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 [2022-07-12 18:17:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:48,677 INFO L225 Difference]: With dead ends: 41 [2022-07-12 18:17:48,677 INFO L226 Difference]: Without dead ends: 41 [2022-07-12 18:17:48,677 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 [2022-07-12 18:17:48,678 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:48,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 65 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-12 18:17:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-07-12 18:17:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.5) internal successors, (42), 36 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) [2022-07-12 18:17:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-07-12 18:17:48,681 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 9 [2022-07-12 18:17:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:48,682 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-07-12 18:17:48,682 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) [2022-07-12 18:17:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-07-12 18:17:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:17:48,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:48,682 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:48,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:48,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:48,888 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-07-12 18:17:48,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:48,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119068614] [2022-07-12 18:17:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:48,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:48,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:48,890 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) [2022-07-12 18:17:48,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:17:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:48,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:17:48,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:48,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:48,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:48,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119068614] [2022-07-12 18:17:48,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119068614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:48,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:17:48,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 18:17:48,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145060485] [2022-07-12 18:17:48,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:48,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:17:48,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:48,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:17:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:17:48,995 INFO L87 Difference]: Start difference. First operand 37 states and 42 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) [2022-07-12 18:17:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:49,036 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-07-12 18:17:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:17:49,037 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 [2022-07-12 18:17:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:49,038 INFO L225 Difference]: With dead ends: 69 [2022-07-12 18:17:49,038 INFO L226 Difference]: Without dead ends: 69 [2022-07-12 18:17:49,038 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 [2022-07-12 18:17:49,038 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 187 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:49,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 127 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:17:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-12 18:17:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2022-07-12 18:17:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) 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) [2022-07-12 18:17:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-07-12 18:17:49,041 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 10 [2022-07-12 18:17:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:49,041 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-07-12 18:17:49,041 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) [2022-07-12 18:17:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-07-12 18:17:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:17:49,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:49,042 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:49,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:49,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:49,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-12 18:17:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:49,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956004031] [2022-07-12 18:17:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:49,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:49,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:49,250 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) [2022-07-12 18:17:49,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:17:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:49,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:17:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:49,323 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 [2022-07-12 18:17:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:49,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:49,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956004031] [2022-07-12 18:17:49,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956004031] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:49,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:17:49,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-07-12 18:17:49,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003068134] [2022-07-12 18:17:49,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:17:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:17:49,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:17:49,756 INFO L87 Difference]: Start difference. First operand 43 states and 48 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) [2022-07-12 18:17:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:50,215 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-07-12 18:17:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:17:50,216 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 [2022-07-12 18:17:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:50,216 INFO L225 Difference]: With dead ends: 77 [2022-07-12 18:17:50,216 INFO L226 Difference]: Without dead ends: 77 [2022-07-12 18:17:50,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:17:50,217 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:50,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 86 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 7 Unchecked, 0.4s Time] [2022-07-12 18:17:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-12 18:17:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2022-07-12 18:17:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.380952380952381) internal successors, (58), 50 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) [2022-07-12 18:17:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-12 18:17:50,220 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 10 [2022-07-12 18:17:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:50,220 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-12 18:17:50,220 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) [2022-07-12 18:17:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-12 18:17:50,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:17:50,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:50,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:50,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:50,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:50,423 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2022-07-12 18:17:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:50,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718557394] [2022-07-12 18:17:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:50,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:50,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:50,425 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) [2022-07-12 18:17:50,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:17:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:50,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:17:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:50,471 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 [2022-07-12 18:17:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:50,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:50,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:50,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718557394] [2022-07-12 18:17:50,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718557394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:50,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:50,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:50,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791641231] [2022-07-12 18:17:50,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:50,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:50,520 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:50,753 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-07-12 18:17:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:50,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 18:17:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:50,755 INFO L225 Difference]: With dead ends: 95 [2022-07-12 18:17:50,755 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 18:17:50,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:17:50,755 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:50,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 107 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:17:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 18:17:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2022-07-12 18:17:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-07-12 18:17:50,759 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 12 [2022-07-12 18:17:50,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:50,760 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-07-12 18:17:50,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-07-12 18:17:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:17:50,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:50,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:50,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:50,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:50,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2022-07-12 18:17:50,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:50,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031657577] [2022-07-12 18:17:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:50,966 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) [2022-07-12 18:17:50,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 18:17:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:17:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:51,022 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 [2022-07-12 18:17:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:51,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:51,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:51,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031657577] [2022-07-12 18:17:51,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031657577] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 18:17:51,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:17:51,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-07-12 18:17:51,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016352532] [2022-07-12 18:17:51,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:51,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:51,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:51,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:51,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:17:51,424 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:51,650 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-07-12 18:17:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:51,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-12 18:17:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:51,651 INFO L225 Difference]: With dead ends: 65 [2022-07-12 18:17:51,651 INFO L226 Difference]: Without dead ends: 65 [2022-07-12 18:17:51,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:17:51,652 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:51,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 36 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-12 18:17:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2022-07-12 18:17:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-12 18:17:51,654 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 12 [2022-07-12 18:17:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:51,654 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-12 18:17:51,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-12 18:17:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:17:51,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:51,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:51,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:51,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:51,855 INFO L85 PathProgramCache]: Analyzing trace with hash 363893485, now seen corresponding path program 1 times [2022-07-12 18:17:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:51,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158039430] [2022-07-12 18:17:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:51,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:51,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:51,857 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) [2022-07-12 18:17:51,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 18:17:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:17:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:51,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:51,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:51,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158039430] [2022-07-12 18:17:51,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158039430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:51,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:51,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:51,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810527023] [2022-07-12 18:17:51,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:51,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:17:51,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:17:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:17:51,908 INFO L87 Difference]: Start difference. First operand 47 states and 55 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) [2022-07-12 18:17:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:52,011 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2022-07-12 18:17:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:17:52,011 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 [2022-07-12 18:17:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:52,012 INFO L225 Difference]: With dead ends: 82 [2022-07-12 18:17:52,012 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 18:17:52,012 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 [2022-07-12 18:17:52,013 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:52,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 81 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 18:17:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2022-07-12 18:17:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 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) [2022-07-12 18:17:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-12 18:17:52,016 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2022-07-12 18:17:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:52,016 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-12 18:17:52,016 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) [2022-07-12 18:17:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-12 18:17:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 18:17:52,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:52,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:52,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:52,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:52,225 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958063, now seen corresponding path program 1 times [2022-07-12 18:17:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496746453] [2022-07-12 18:17:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:52,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:52,227 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) [2022-07-12 18:17:52,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:17:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:52,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:17:52,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:52,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:52,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:52,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496746453] [2022-07-12 18:17:52,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496746453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:52,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:17:52,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-12 18:17:52,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681307486] [2022-07-12 18:17:52,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:52,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:17:52,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:17:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:17:52,443 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:52,681 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-07-12 18:17:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:17:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 18:17:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:52,682 INFO L225 Difference]: With dead ends: 84 [2022-07-12 18:17:52,682 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 18:17:52,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:17:52,682 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 253 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:52,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 99 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:17:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 18:17:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2022-07-12 18:17:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 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) [2022-07-12 18:17:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-12 18:17:52,685 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 13 [2022-07-12 18:17:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:52,685 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-12 18:17:52,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-12 18:17:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:17:52,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:52,686 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-07-12 18:17:52,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:52,892 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2022-07-12 18:17:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:52,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790203052] [2022-07-12 18:17:52,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:17:52,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:52,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:52,893 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) [2022-07-12 18:17:52,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 18:17:52,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:17:52,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:17:52,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:17:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:52,956 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 [2022-07-12 18:17:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:53,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:17:53,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:53,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790203052] [2022-07-12 18:17:53,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790203052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:53,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:17:53,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-12 18:17:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026954153] [2022-07-12 18:17:53,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:53,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:17:53,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:17:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:17:53,761 INFO L87 Difference]: Start difference. First operand 47 states and 54 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) [2022-07-12 18:17:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:55,698 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2022-07-12 18:17:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:17:55,699 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 [2022-07-12 18:17:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:55,700 INFO L225 Difference]: With dead ends: 173 [2022-07-12 18:17:55,700 INFO L226 Difference]: Without dead ends: 173 [2022-07-12 18:17:55,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:17:55,700 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 247 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:55,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 376 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 67 Unchecked, 0.9s Time] [2022-07-12 18:17:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-12 18:17:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 63. [2022-07-12 18:17:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 62 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) [2022-07-12 18:17:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-07-12 18:17:55,703 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 18 [2022-07-12 18:17:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:55,703 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-07-12 18:17:55,703 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) [2022-07-12 18:17:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-07-12 18:17:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:17:55,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:55,703 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:55,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:55,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:55,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1194451038, now seen corresponding path program 1 times [2022-07-12 18:17:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:55,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828800247] [2022-07-12 18:17:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:55,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:55,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:55,920 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) [2022-07-12 18:17:55,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:17:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:17:55,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:56,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:56,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:56,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828800247] [2022-07-12 18:17:56,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828800247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:56,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:17:56,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 18:17:56,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042172595] [2022-07-12 18:17:56,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:56,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:17:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:17:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:17:56,066 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:56,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:56,165 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-07-12 18:17:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:17:56,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 18:17:56,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:56,166 INFO L225 Difference]: With dead ends: 83 [2022-07-12 18:17:56,166 INFO L226 Difference]: Without dead ends: 83 [2022-07-12 18:17:56,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:17:56,167 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:56,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 102 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:17:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-12 18:17:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2022-07-12 18:17:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2022-07-12 18:17:56,169 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 19 [2022-07-12 18:17:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:56,169 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2022-07-12 18:17:56,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2022-07-12 18:17:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 18:17:56,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:56,170 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:56,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:56,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:56,370 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:56,371 INFO L85 PathProgramCache]: Analyzing trace with hash -393896864, now seen corresponding path program 1 times [2022-07-12 18:17:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:56,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312169044] [2022-07-12 18:17:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:56,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:56,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:56,373 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) [2022-07-12 18:17:56,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:17:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:56,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:17:56,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:56,426 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 [2022-07-12 18:17:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:56,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:17:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:57,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312169044] [2022-07-12 18:17:57,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312169044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:17:57,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:17:57,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-12 18:17:57,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750476605] [2022-07-12 18:17:57,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:17:57,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:17:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:57,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:17:57,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:17:57,062 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 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) [2022-07-12 18:17:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:57,731 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2022-07-12 18:17:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:17:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 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 19 [2022-07-12 18:17:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:57,732 INFO L225 Difference]: With dead ends: 115 [2022-07-12 18:17:57,732 INFO L226 Difference]: Without dead ends: 115 [2022-07-12 18:17:57,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:17:57,733 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 139 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:57,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 129 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2022-07-12 18:17:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-12 18:17:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-07-12 18:17:57,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:57,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2022-07-12 18:17:57,736 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 19 [2022-07-12 18:17:57,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:57,736 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2022-07-12 18:17:57,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 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) [2022-07-12 18:17:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2022-07-12 18:17:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:17:57,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:57,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:57,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:57,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:57,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1626723800, now seen corresponding path program 1 times [2022-07-12 18:17:57,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:57,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787487506] [2022-07-12 18:17:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:57,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:57,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:57,945 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) [2022-07-12 18:17:57,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:17:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:17:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:17:58,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:58,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:58,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787487506] [2022-07-12 18:17:58,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787487506] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:58,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:58,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:58,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105917309] [2022-07-12 18:17:58,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:58,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:58,083 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:58,104 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2022-07-12 18:17:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:58,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-12 18:17:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:58,105 INFO L225 Difference]: With dead ends: 144 [2022-07-12 18:17:58,105 INFO L226 Difference]: Without dead ends: 139 [2022-07-12 18:17:58,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:58,106 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:58,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-12 18:17:58,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-12 18:17:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2022-07-12 18:17:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 129 states have (on average 1.2403100775193798) internal successors, (160), 131 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2022-07-12 18:17:58,110 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 20 [2022-07-12 18:17:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:58,110 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2022-07-12 18:17:58,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2022-07-12 18:17:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 18:17:58,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:58,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:58,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:58,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:58,320 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash 943948737, now seen corresponding path program 1 times [2022-07-12 18:17:58,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:58,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830766703] [2022-07-12 18:17:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:58,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:58,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:58,322 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) [2022-07-12 18:17:58,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 18:17:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:58,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:17:58,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:17:58,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:58,468 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:58,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830766703] [2022-07-12 18:17:58,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830766703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:58,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:58,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:58,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843849467] [2022-07-12 18:17:58,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:58,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:58,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:58,470 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:58,497 INFO L93 Difference]: Finished difference Result 168 states and 206 transitions. [2022-07-12 18:17:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:58,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-12 18:17:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:58,498 INFO L225 Difference]: With dead ends: 168 [2022-07-12 18:17:58,498 INFO L226 Difference]: Without dead ends: 163 [2022-07-12 18:17:58,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:58,499 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:58,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-12 18:17:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-12 18:17:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2022-07-12 18:17:58,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 135 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2022-07-12 18:17:58,501 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 22 [2022-07-12 18:17:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:58,501 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2022-07-12 18:17:58,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2022-07-12 18:17:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:17:58,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:58,502 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:58,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:58,709 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:58,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1425250584, now seen corresponding path program 1 times [2022-07-12 18:17:58,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:58,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028209080] [2022-07-12 18:17:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:58,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:58,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:58,711 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) [2022-07-12 18:17:58,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 18:17:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:58,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:17:58,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:58,810 INFO L356 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2022-07-12 18:17:58,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-07-12 18:17:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:58,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:58,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028209080] [2022-07-12 18:17:58,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028209080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:58,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:58,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:17:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834485630] [2022-07-12 18:17:58,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:58,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:58,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:58,830 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:58,943 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2022-07-12 18:17:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-07-12 18:17:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:58,944 INFO L225 Difference]: With dead ends: 148 [2022-07-12 18:17:58,944 INFO L226 Difference]: Without dead ends: 146 [2022-07-12 18:17:58,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:17:58,944 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:58,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-07-12 18:17:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-12 18:17:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-07-12 18:17:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.2237762237762237) internal successors, (175), 145 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2022-07-12 18:17:58,947 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 28 [2022-07-12 18:17:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:58,947 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2022-07-12 18:17:58,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:58,947 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2022-07-12 18:17:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:17:58,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:58,948 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:58,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:59,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:59,155 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:59,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:59,155 INFO L85 PathProgramCache]: Analyzing trace with hash 212486577, now seen corresponding path program 1 times [2022-07-12 18:17:59,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:59,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459729087] [2022-07-12 18:17:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:59,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:59,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:59,156 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) [2022-07-12 18:17:59,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 18:17:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:59,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:17:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:59,261 INFO L356 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2022-07-12 18:17:59,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-07-12 18:17:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:17:59,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:59,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:59,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459729087] [2022-07-12 18:17:59,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459729087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:59,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:59,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:17:59,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080642578] [2022-07-12 18:17:59,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:59,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:59,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:59,284 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:59,549 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2022-07-12 18:17:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:59,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-07-12 18:17:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:59,551 INFO L225 Difference]: With dead ends: 158 [2022-07-12 18:17:59,551 INFO L226 Difference]: Without dead ends: 156 [2022-07-12 18:17:59,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:17:59,551 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:59,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-07-12 18:17:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-12 18:17:59,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2022-07-12 18:17:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.2167832167832169) internal successors, (174), 145 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2022-07-12 18:17:59,555 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 30 [2022-07-12 18:17:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:59,555 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2022-07-12 18:17:59,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,555 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2022-07-12 18:17:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:17:59,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:59,556 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:59,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:17:59,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:17:59,756 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:17:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:17:59,757 INFO L85 PathProgramCache]: Analyzing trace with hash -808581777, now seen corresponding path program 1 times [2022-07-12 18:17:59,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:17:59,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755570683] [2022-07-12 18:17:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:17:59,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:17:59,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:17:59,758 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) [2022-07-12 18:17:59,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-12 18:17:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:17:59,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:17:59,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:17:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:17:59,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:17:59,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:17:59,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755570683] [2022-07-12 18:17:59,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755570683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:17:59,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:17:59,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:17:59,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107825895] [2022-07-12 18:17:59,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:17:59,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:17:59,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:17:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:17:59,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:59,937 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:17:59,941 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2022-07-12 18:17:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:17:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-12 18:17:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:17:59,942 INFO L225 Difference]: With dead ends: 145 [2022-07-12 18:17:59,942 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:17:59,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:17:59,942 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:17:59,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 65 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-07-12 18:17:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:17:59,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-07-12 18:17:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-07-12 18:17:59,945 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 30 [2022-07-12 18:17:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:17:59,945 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-07-12 18:17:59,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:17:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-07-12 18:17:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:17:59,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:17:59,946 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:17:59,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:00,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:18:00,146 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:18:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash -521097088, now seen corresponding path program 2 times [2022-07-12 18:18:00,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:18:00,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016678556] [2022-07-12 18:18:00,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:18:00,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:18:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:18:00,148 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) [2022-07-12 18:18:00,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 18:18:00,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:18:00,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:00,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:18:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:00,224 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 [2022-07-12 18:18:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:18:00,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:01,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:18:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016678556] [2022-07-12 18:18:01,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016678556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:01,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:18:01,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2022-07-12 18:18:01,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266762059] [2022-07-12 18:18:01,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:01,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:18:01,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:18:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:18:01,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:18:01,736 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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) [2022-07-12 18:18:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:02,241 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2022-07-12 18:18:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:18:02,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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 33 [2022-07-12 18:18:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:02,242 INFO L225 Difference]: With dead ends: 107 [2022-07-12 18:18:02,242 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 18:18:02,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:18:02,243 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:02,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 10 Unchecked, 0.4s Time] [2022-07-12 18:18:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 18:18:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-07-12 18:18:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2022-07-12 18:18:02,245 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 33 [2022-07-12 18:18:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:02,245 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2022-07-12 18:18:02,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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) [2022-07-12 18:18:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2022-07-12 18:18:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 18:18:02,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:02,246 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2022-07-12 18:18:02,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:18:02,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:18:02,453 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:18:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:02,453 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2022-07-12 18:18:02,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:18:02,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64232688] [2022-07-12 18:18:02,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:18:02,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:18:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:18:02,454 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) [2022-07-12 18:18:02,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 18:18:02,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 18:18:02,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:18:02,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:02,576 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 [2022-07-12 18:18:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:03,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:05,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:18:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64232688] [2022-07-12 18:18:05,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64232688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:05,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:18:05,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-12 18:18:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529289265] [2022-07-12 18:18:05,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:05,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:18:05,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:18:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:18:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:18:05,663 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 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) [2022-07-12 18:18:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:19,646 INFO L93 Difference]: Finished difference Result 844 states and 985 transitions. [2022-07-12 18:18:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 18:18:19,647 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 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 [2022-07-12 18:18:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:19,651 INFO L225 Difference]: With dead ends: 844 [2022-07-12 18:18:19,651 INFO L226 Difference]: Without dead ends: 844 [2022-07-12 18:18:19,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=547, Invalid=1259, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 18:18:19,652 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 2020 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:19,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2020 Valid, 1043 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1061 Invalid, 0 Unknown, 111 Unchecked, 3.2s Time] [2022-07-12 18:18:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-07-12 18:18:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 133. [2022-07-12 18:18:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 132 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2022-07-12 18:18:19,657 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 34 [2022-07-12 18:18:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:19,657 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2022-07-12 18:18:19,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 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) [2022-07-12 18:18:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2022-07-12 18:18:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 18:18:19,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:19,659 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:19,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-12 18:18:19,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:18:19,863 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:18:19,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash -701692519, now seen corresponding path program 1 times [2022-07-12 18:18:19,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:18:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394415247] [2022-07-12 18:18:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:18:19,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:18:19,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:18:19,865 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) [2022-07-12 18:18:19,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 18:18:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:18:19,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:18:19,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:19,943 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 [2022-07-12 18:18:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:18:20,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:21,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:18:21,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394415247] [2022-07-12 18:18:21,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394415247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:21,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:18:21,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2022-07-12 18:18:21,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218111239] [2022-07-12 18:18:21,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:21,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:18:21,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:18:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:18:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:18:21,571 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:22,050 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2022-07-12 18:18:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:18:22,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 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 35 [2022-07-12 18:18:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:22,052 INFO L225 Difference]: With dead ends: 138 [2022-07-12 18:18:22,052 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 18:18:22,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:18:22,052 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:22,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 114 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-07-12 18:18:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 18:18:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2022-07-12 18:18:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 125 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:22,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 150 transitions. [2022-07-12 18:18:22,054 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 150 transitions. Word has length 35 [2022-07-12 18:18:22,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:22,054 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 150 transitions. [2022-07-12 18:18:22,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:22,055 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 150 transitions. [2022-07-12 18:18:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 18:18:22,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:22,055 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:22,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-12 18:18:22,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:18:22,256 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:18:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:22,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1227137273, now seen corresponding path program 2 times [2022-07-12 18:18:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:18:22,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669532176] [2022-07-12 18:18:22,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:18:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:18:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:18:22,257 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) [2022-07-12 18:18:22,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:18:22,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:18:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:22,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:18:22,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:22,340 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 [2022-07-12 18:18:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:22,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:18:23,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:18:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669532176] [2022-07-12 18:18:23,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669532176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:23,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:18:23,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-12 18:18:23,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415928436] [2022-07-12 18:18:23,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:23,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:18:23,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:18:23,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:18:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:18:23,656 INFO L87 Difference]: Start difference. First operand 126 states and 150 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:26,118 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2022-07-12 18:18:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:18:26,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2022-07-12 18:18:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:26,121 INFO L225 Difference]: With dead ends: 195 [2022-07-12 18:18:26,121 INFO L226 Difference]: Without dead ends: 195 [2022-07-12 18:18:26,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2022-07-12 18:18:26,123 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 296 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:26,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 257 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 241 Invalid, 0 Unknown, 57 Unchecked, 0.9s Time] [2022-07-12 18:18:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-12 18:18:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-07-12 18:18:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.1979166666666667) internal successors, (230), 193 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:26,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2022-07-12 18:18:26,129 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 35 [2022-07-12 18:18:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:26,129 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2022-07-12 18:18:26,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2022-07-12 18:18:26,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-12 18:18:26,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:26,130 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:26,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-12 18:18:26,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:18:26,336 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:18:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:26,337 INFO L85 PathProgramCache]: Analyzing trace with hash -856498489, now seen corresponding path program 3 times [2022-07-12 18:18:26,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:18:26,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782736885] [2022-07-12 18:18:26,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:18:26,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:18:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:18:26,338 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) [2022-07-12 18:18:26,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 18:18:26,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 18:18:26,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:18:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:26,432 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 [2022-07-12 18:18:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-12 18:18:27,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-12 18:18:29,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:18:29,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782736885] [2022-07-12 18:18:29,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782736885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:29,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:18:29,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-12 18:18:29,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488626683] [2022-07-12 18:18:29,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:29,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:18:29,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:18:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:18:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:18:29,691 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2022-07-12 18:18:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:29,875 INFO L93 Difference]: Finished difference Result 283 states and 334 transitions. [2022-07-12 18:18:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:18:29,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) Word has length 63 [2022-07-12 18:18:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:29,877 INFO L225 Difference]: With dead ends: 283 [2022-07-12 18:18:29,877 INFO L226 Difference]: Without dead ends: 277 [2022-07-12 18:18:29,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:18:29,878 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:29,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 182 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-07-12 18:18:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-07-12 18:18:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 270. [2022-07-12 18:18:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.1977611940298507) internal successors, (321), 269 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 321 transitions. [2022-07-12 18:18:29,882 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 321 transitions. Word has length 63 [2022-07-12 18:18:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:29,882 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 321 transitions. [2022-07-12 18:18:29,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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) [2022-07-12 18:18:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 321 transitions. [2022-07-12 18:18:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-12 18:18:29,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:29,883 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:18:29,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-12 18:18:30,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:18:30,090 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:18:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:30,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1772212195, now seen corresponding path program 3 times [2022-07-12 18:18:30,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:18:30,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422002712] [2022-07-12 18:18:30,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:18:30,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:18:30,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:18:30,092 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) [2022-07-12 18:18:30,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:18:30,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 18:18:30,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:18:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:30,232 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 [2022-07-12 18:18:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 99 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 18:18:31,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-12 18:18:37,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:18:37,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422002712] [2022-07-12 18:18:37,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422002712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:37,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:18:37,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-12 18:18:37,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017651128] [2022-07-12 18:18:37,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:37,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:18:37,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:18:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:18:37,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:18:37,409 INFO L87 Difference]: Start difference. First operand 270 states and 321 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:37,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:18:37,910 INFO L93 Difference]: Finished difference Result 289 states and 341 transitions. [2022-07-12 18:18:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:18:37,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 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 65 [2022-07-12 18:18:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:18:37,912 INFO L225 Difference]: With dead ends: 289 [2022-07-12 18:18:37,912 INFO L226 Difference]: Without dead ends: 283 [2022-07-12 18:18:37,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:18:37,912 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:18:37,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 266 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-07-12 18:18:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-12 18:18:37,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2022-07-12 18:18:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 279 states have (on average 1.1935483870967742) internal successors, (333), 280 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 333 transitions. [2022-07-12 18:18:37,920 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 333 transitions. Word has length 65 [2022-07-12 18:18:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:18:37,920 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 333 transitions. [2022-07-12 18:18:37,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:18:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 333 transitions. [2022-07-12 18:18:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-12 18:18:37,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:18:37,921 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2022-07-12 18:18:37,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-12 18:18:38,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:18:38,129 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:18:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:18:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2022-07-12 18:18:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:18:38,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357508181] [2022-07-12 18:18:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:18:38,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:18:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:18:38,131 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) [2022-07-12 18:18:38,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 18:18:38,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:18:38,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:18:38,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:18:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:18:38,247 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 [2022-07-12 18:18:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:39,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:18:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:18:47,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:18:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357508181] [2022-07-12 18:18:47,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357508181] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:18:47,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:18:47,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2022-07-12 18:18:47,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845418344] [2022-07-12 18:18:47,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:18:47,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 18:18:47,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:18:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 18:18:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:18:47,944 INFO L87 Difference]: Start difference. First operand 281 states and 333 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) [2022-07-12 18:18:59,439 WARN L233 SmtUtils]: Spent 7.44s 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) [2022-07-12 18:19:01,605 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 [] [2022-07-12 18:19:03,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:19:05,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:19:07,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:19:15,874 WARN L233 SmtUtils]: Spent 7.63s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:19:29,208 WARN L233 SmtUtils]: Spent 12.76s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:19:31,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:19:33,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:19:35,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 18:19:37,659 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 [] [2022-07-12 18:19:54,889 WARN L233 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:20:10,206 WARN L233 SmtUtils]: Spent 9.35s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:20:23,221 WARN L233 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:20:34,042 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:21:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:21:05,528 INFO L93 Difference]: Finished difference Result 3900 states and 4574 transitions. [2022-07-12 18:21:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-12 18:21:05,530 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 66 [2022-07-12 18:21:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:21:05,537 INFO L225 Difference]: With dead ends: 3900 [2022-07-12 18:21:05,537 INFO L226 Difference]: Without dead ends: 3900 [2022-07-12 18:21:05,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 115.6s TimeCoverageRelationStatistics Valid=2223, Invalid=5259, Unknown=0, NotChecked=0, Total=7482 [2022-07-12 18:21:05,539 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 6174 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 3669 mSolverCounterSat, 172 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6174 SdHoareTripleChecker+Valid, 3343 SdHoareTripleChecker+Invalid, 3910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3669 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:21:05,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6174 Valid, 3343 Invalid, 3910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3669 Invalid, 7 Unknown, 62 Unchecked, 28.0s Time] [2022-07-12 18:21:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2022-07-12 18:21:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 345. [2022-07-12 18:21:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 343 states have (on average 1.2040816326530612) internal successors, (413), 344 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 413 transitions. [2022-07-12 18:21:05,555 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 413 transitions. Word has length 66 [2022-07-12 18:21:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:21:05,555 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 413 transitions. [2022-07-12 18:21:05,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-12 18:21:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 413 transitions. [2022-07-12 18:21:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 18:21:05,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:21:05,556 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:21:05,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:21:05,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:21:05,764 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:21:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:21:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1851526538, now seen corresponding path program 4 times [2022-07-12 18:21:05,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:21:05,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031659717] [2022-07-12 18:21:05,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:21:05,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:21:05,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:21:05,765 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) [2022-07-12 18:21:05,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 18:21:05,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:21:05,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:21:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:21:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:21:05,880 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 [2022-07-12 18:21:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 18:21:06,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:21:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:21:09,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:21:09,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031659717] [2022-07-12 18:21:09,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031659717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:21:09,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:21:09,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2022-07-12 18:21:09,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477258903] [2022-07-12 18:21:09,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:21:09,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:21:09,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:21:09,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:21:09,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:21:09,674 INFO L87 Difference]: Start difference. First operand 345 states and 413 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:21:26,734 INFO L93 Difference]: Finished difference Result 842 states and 990 transitions. [2022-07-12 18:21:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-12 18:21:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-12 18:21:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:21:26,738 INFO L225 Difference]: With dead ends: 842 [2022-07-12 18:21:26,738 INFO L226 Difference]: Without dead ends: 841 [2022-07-12 18:21:26,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=329, Invalid=2641, Unknown=0, NotChecked=0, Total=2970 [2022-07-12 18:21:26,739 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 390 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:21:26,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 1362 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1204 Invalid, 0 Unknown, 108 Unchecked, 9.6s Time] [2022-07-12 18:21:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-07-12 18:21:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 501. [2022-07-12 18:21:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 499 states have (on average 1.1923847695390781) internal successors, (595), 500 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 595 transitions. [2022-07-12 18:21:26,745 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 595 transitions. Word has length 67 [2022-07-12 18:21:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:21:26,745 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 595 transitions. [2022-07-12 18:21:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 595 transitions. [2022-07-12 18:21:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 18:21:26,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:21:26,746 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:21:26,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:21:26,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:21:26,953 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:21:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:21:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1209465572, now seen corresponding path program 5 times [2022-07-12 18:21:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:21:26,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607746579] [2022-07-12 18:21:26,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:21:26,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:21:26,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:21:26,955 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) [2022-07-12 18:21:26,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 18:21:27,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-12 18:21:27,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:21:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:21:27,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:21:27,126 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 [2022-07-12 18:21:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 18:21:27,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:21:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:21:30,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:21:30,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607746579] [2022-07-12 18:21:30,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607746579] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:21:30,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:21:30,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2022-07-12 18:21:30,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561217556] [2022-07-12 18:21:30,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:21:30,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:21:30,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:21:30,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:21:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:21:30,775 INFO L87 Difference]: Start difference. First operand 501 states and 595 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:21:57,967 INFO L93 Difference]: Finished difference Result 1120 states and 1315 transitions. [2022-07-12 18:21:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 18:21:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-12 18:21:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:21:57,970 INFO L225 Difference]: With dead ends: 1120 [2022-07-12 18:21:57,970 INFO L226 Difference]: Without dead ends: 1114 [2022-07-12 18:21:57,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=630, Invalid=3926, Unknown=0, NotChecked=0, Total=4556 [2022-07-12 18:21:57,976 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1183 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:21:57,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 1865 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1581 Invalid, 0 Unknown, 558 Unchecked, 14.7s Time] [2022-07-12 18:21:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-07-12 18:21:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 503. [2022-07-12 18:21:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 501 states have (on average 1.1936127744510978) internal successors, (598), 502 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 598 transitions. [2022-07-12 18:21:57,985 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 598 transitions. Word has length 67 [2022-07-12 18:21:57,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:21:57,985 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 598 transitions. [2022-07-12 18:21:57,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:21:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 598 transitions. [2022-07-12 18:21:57,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 18:21:57,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:21:57,986 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:21:58,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:21:58,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:21:58,195 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:21:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:21:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1894184131, now seen corresponding path program 6 times [2022-07-12 18:21:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:21:58,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969621088] [2022-07-12 18:21:58,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:21:58,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:21:58,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:21:58,196 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) [2022-07-12 18:21:58,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-12 18:21:58,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-12 18:21:58,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:21:58,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:21:58,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:21:58,320 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 [2022-07-12 18:21:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 84 proven. 23 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-12 18:21:58,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:21:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-12 18:21:59,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:21:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969621088] [2022-07-12 18:21:59,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969621088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:21:59,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:21:59,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-12 18:21:59,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135388959] [2022-07-12 18:21:59,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:21:59,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 18:21:59,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:21:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 18:21:59,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-07-12 18:21:59,584 INFO L87 Difference]: Start difference. First operand 503 states and 598 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:00,105 INFO L93 Difference]: Finished difference Result 507 states and 601 transitions. [2022-07-12 18:22:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 18:22:00,106 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2022-07-12 18:22:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:00,107 INFO L225 Difference]: With dead ends: 507 [2022-07-12 18:22:00,107 INFO L226 Difference]: Without dead ends: 479 [2022-07-12 18:22:00,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:22:00,107 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:00,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 392 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 171 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-07-12 18:22:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-07-12 18:22:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2022-07-12 18:22:00,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 477 states have (on average 1.1970649895178198) internal successors, (571), 478 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 571 transitions. [2022-07-12 18:22:00,115 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 571 transitions. Word has length 69 [2022-07-12 18:22:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:00,116 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 571 transitions. [2022-07-12 18:22:00,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:22:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 571 transitions. [2022-07-12 18:22:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 18:22:00,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:00,117 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:00,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-12 18:22:00,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:22:00,324 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:22:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1202378883, now seen corresponding path program 7 times [2022-07-12 18:22:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:22:00,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769456497] [2022-07-12 18:22:00,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:22:00,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:22:00,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:22:00,326 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) [2022-07-12 18:22:00,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 18:22:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:22:00,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:22:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:00,441 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 [2022-07-12 18:22:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 92 proven. 35 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 18:22:00,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:22:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:22:04,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:22:04,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769456497] [2022-07-12 18:22:04,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769456497] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:22:04,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:22:04,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2022-07-12 18:22:04,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296870758] [2022-07-12 18:22:04,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:22:04,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:22:04,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:22:04,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:22:04,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:22:04,049 INFO L87 Difference]: Start difference. First operand 479 states and 571 transitions. Second operand has 25 states, 25 states have (on average 4.64) internal successors, (116), 25 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) [2022-07-12 18:22:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:22:23,208 INFO L93 Difference]: Finished difference Result 778 states and 919 transitions. [2022-07-12 18:22:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 18:22:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.64) internal successors, (116), 25 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) Word has length 69 [2022-07-12 18:22:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:22:23,211 INFO L225 Difference]: With dead ends: 778 [2022-07-12 18:22:23,211 INFO L226 Difference]: Without dead ends: 772 [2022-07-12 18:22:23,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2022-07-12 18:22:23,212 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 945 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:22:23,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 1247 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1265 Invalid, 0 Unknown, 145 Unchecked, 11.8s Time] [2022-07-12 18:22:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-07-12 18:22:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 479. [2022-07-12 18:22:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 477 states have (on average 1.1949685534591195) internal successors, (570), 478 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) [2022-07-12 18:22:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 570 transitions. [2022-07-12 18:22:23,225 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 570 transitions. Word has length 69 [2022-07-12 18:22:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:22:23,225 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 570 transitions. [2022-07-12 18:22:23,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.64) internal successors, (116), 25 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) [2022-07-12 18:22:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 570 transitions. [2022-07-12 18:22:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-12 18:22:23,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:22:23,226 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:22:23,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:22:23,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:22:23,433 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:22:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:22:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1784706217, now seen corresponding path program 4 times [2022-07-12 18:22:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:22:23,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050464712] [2022-07-12 18:22:23,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:22:23,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:22:23,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:22:23,435 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) [2022-07-12 18:22:23,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 18:22:23,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:22:23,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:22:23,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:22:23,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:22:23,572 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 [2022-07-12 18:22:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 18:22:24,390 INFO L328 TraceCheckSpWp]: Computing backward predicates...