./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.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/ldv-memsafety/memleaks_test17_1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6787eb3a37902efa71d2cd0d9e143f31d9492f6d095b3afd518dba74579db5b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:53:08,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:53:08,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:53:08,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:53:08,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:53:08,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:53:08,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:53:08,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:53:08,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:53:08,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:53:08,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:53:08,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:53:08,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:53:08,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:53:08,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:53:08,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:53:08,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:53:08,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:53:08,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:53:08,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:53:08,541 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:53:08,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:53:08,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:53:08,544 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:53:08,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:53:08,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:53:08,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:53:08,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:53:08,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:53:08,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:53:08,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:53:08,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:53:08,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:53:08,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:53:08,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:53:08,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:53:08,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:53:08,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:53:08,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:53:08,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:53:08,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:53:08,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:53:08,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:53:08,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:53:08,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:53:08,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:53:08,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:53:08,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:53:08,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:53:08,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:53:08,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:53:08,595 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:53:08,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:53:08,596 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:53:08,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:53:08,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:53:08,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:53:08,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:53:08,597 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:53:08,597 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:53:08,598 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:53:08,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:53:08,599 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:53:08,599 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:53:08,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:53:08,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:53:08,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:53:08,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:53:08,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:53:08,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:53:08,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:53:08,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:53:08,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:53:08,601 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6787eb3a37902efa71d2cd0d9e143f31d9492f6d095b3afd518dba74579db5b [2022-07-12 18:53:08,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:53:08,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:53:08,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:53:08,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:53:08,842 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:53:08,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i [2022-07-12 18:53:08,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66679fe09/89b4bed62f1d4bec8fe064ab65d0d82e/FLAG851e0744c [2022-07-12 18:53:09,332 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:53:09,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i [2022-07-12 18:53:09,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66679fe09/89b4bed62f1d4bec8fe064ab65d0d82e/FLAG851e0744c [2022-07-12 18:53:09,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66679fe09/89b4bed62f1d4bec8fe064ab65d0d82e [2022-07-12 18:53:09,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:53:09,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:53:09,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:53:09,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:53:09,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:53:09,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:53:09" (1/1) ... [2022-07-12 18:53:09,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132c1399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:09, skipping insertion in model container [2022-07-12 18:53:09,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:53:09" (1/1) ... [2022-07-12 18:53:09,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:53:09,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:53:10,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:53:10,093 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 18:53:10,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c4bb2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:10, skipping insertion in model container [2022-07-12 18:53:10,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:53:10,094 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:53:10,096 INFO L158 Benchmark]: Toolchain (without parser) took 387.42ms. Allocated memory is still 96.5MB. Free memory was 64.4MB in the beginning and 69.1MB in the end (delta: -4.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:53:10,096 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 96.5MB. Free memory is still 54.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:53:10,097 INFO L158 Benchmark]: CACSL2BoogieTranslator took 385.85ms. Allocated memory is still 96.5MB. Free memory was 64.2MB in the beginning and 69.1MB in the end (delta: -5.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:53:10,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 96.5MB. Free memory is still 54.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 385.85ms. Allocated memory is still 96.5MB. Free memory was 64.2MB in the beginning and 69.1MB in the end (delta: -5.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types 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/ldv-memsafety/memleaks_test17_1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6787eb3a37902efa71d2cd0d9e143f31d9492f6d095b3afd518dba74579db5b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:53:11,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:53:11,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:53:11,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:53:11,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:53:11,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:53:11,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:53:11,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:53:11,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:53:11,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:53:11,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:53:11,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:53:11,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:53:11,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:53:11,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:53:11,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:53:11,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:53:11,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:53:11,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:53:11,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:53:11,652 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:53:11,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:53:11,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:53:11,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:53:11,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:53:11,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:53:11,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:53:11,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:53:11,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:53:11,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:53:11,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:53:11,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:53:11,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:53:11,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:53:11,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:53:11,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:53:11,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:53:11,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:53:11,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:53:11,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:53:11,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:53:11,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:53:11,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:53:11,695 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:53:11,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:53:11,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:53:11,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:53:11,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:53:11,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:53:11,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:53:11,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:53:11,697 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:53:11,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:53:11,698 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:53:11,698 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:53:11,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:53:11,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:53:11,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:53:11,699 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:53:11,699 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:53:11,699 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:53:11,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:53:11,699 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:53:11,700 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:53:11,700 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:53:11,700 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:53:11,700 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:53:11,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:53:11,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:53:11,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:53:11,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:53:11,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:53:11,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:53:11,701 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:53:11,701 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:11,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:53:11,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6787eb3a37902efa71d2cd0d9e143f31d9492f6d095b3afd518dba74579db5b [2022-07-12 18:53:11,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:53:11,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:53:11,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:53:11,992 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:53:11,992 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:53:11,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i [2022-07-12 18:53:12,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a2c71561/955d7741fd3b4a3183e3c0922f8dfcad/FLAG64056ef99 [2022-07-12 18:53:12,424 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:53:12,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-1.i [2022-07-12 18:53:12,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a2c71561/955d7741fd3b4a3183e3c0922f8dfcad/FLAG64056ef99 [2022-07-12 18:53:12,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a2c71561/955d7741fd3b4a3183e3c0922f8dfcad [2022-07-12 18:53:12,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:53:12,461 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:53:12,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:53:12,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:53:12,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:53:12,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:12,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ae9c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12, skipping insertion in model container [2022-07-12 18:53:12,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:12,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:53:12,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:53:12,847 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:53:12,860 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:53:12,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:53:12,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:53:12,896 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:53:12,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:53:12,965 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:53:12,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12 WrapperNode [2022-07-12 18:53:12,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:53:12,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:53:12,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:53:12,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:53:12,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:12,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,014 INFO L137 Inliner]: procedures = 167, calls = 78, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 85 [2022-07-12 18:53:13,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:53:13,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:53:13,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:53:13,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:53:13,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:53:13,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:53:13,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:53:13,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:53:13,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (1/1) ... [2022-07-12 18:53:13,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:53:13,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:53:13,094 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 18:53:13,102 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 18:53:13,131 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 18:53:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 18:53:13,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:53:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:53:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:53:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:53:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:53:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:53:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:53:13,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:53:13,278 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:53:13,280 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:53:13,538 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:53:13,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:53:13,545 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 18:53:13,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:53:13 BoogieIcfgContainer [2022-07-12 18:53:13,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:53:13,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:53:13,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:53:13,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:53:13,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:53:12" (1/3) ... [2022-07-12 18:53:13,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f9fd2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:53:13, skipping insertion in model container [2022-07-12 18:53:13,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:53:12" (2/3) ... [2022-07-12 18:53:13,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f9fd2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:53:13, skipping insertion in model container [2022-07-12 18:53:13,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:53:13" (3/3) ... [2022-07-12 18:53:13,553 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_1-1.i [2022-07-12 18:53:13,562 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:53:13,563 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-07-12 18:53:13,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:53:13,597 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@681bf798, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65a159be [2022-07-12 18:53:13,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-07-12 18:53:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 54 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:13,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:13,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:13,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash 67903625, now seen corresponding path program 1 times [2022-07-12 18:53:13,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:13,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034962722] [2022-07-12 18:53:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:13,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:13,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:13,618 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 18:53:13,629 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 18:53:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:13,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:53:13,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:13,746 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 18:53:13,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:13,746 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:13,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034962722] [2022-07-12 18:53:13,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034962722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:13,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:13,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:53:13,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144896594] [2022-07-12 18:53:13,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:13,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:53:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:53:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:13,782 INFO L87 Difference]: Start difference. First operand has 58 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 54 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:13,874 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2022-07-12 18:53:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:53:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-12 18:53:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:13,883 INFO L225 Difference]: With dead ends: 111 [2022-07-12 18:53:13,883 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 18:53:13,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:13,891 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 53 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:13,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 239 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 18:53:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 60. [2022-07-12 18:53:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.5897435897435896) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:53:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-07-12 18:53:13,928 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2022-07-12 18:53:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:13,929 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-07-12 18:53:13,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-07-12 18:53:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:13,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:13,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:13,942 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 18:53:14,140 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 18:53:14,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:14,141 INFO L85 PathProgramCache]: Analyzing trace with hash 67902731, now seen corresponding path program 1 times [2022-07-12 18:53:14,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:14,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435930721] [2022-07-12 18:53:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:14,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:14,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:14,143 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 18:53:14,144 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 18:53:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:14,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:53:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:14,217 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 18:53:14,258 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 18:53:14,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:14,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:14,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435930721] [2022-07-12 18:53:14,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435930721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:14,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:14,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:53:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233034728] [2022-07-12 18:53:14,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:14,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:53:14,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:14,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:53:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:14,261 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:14,367 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-07-12 18:53:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:53:14,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-12 18:53:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:14,368 INFO L225 Difference]: With dead ends: 82 [2022-07-12 18:53:14,369 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 18:53:14,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:14,370 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 22 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:14,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 166 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 18:53:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2022-07-12 18:53:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:53:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-07-12 18:53:14,374 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 11 [2022-07-12 18:53:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:14,375 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-07-12 18:53:14,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:14,375 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-07-12 18:53:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:14,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:14,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:14,392 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 18:53:14,579 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 18:53:14,580 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 18:53:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:14,580 INFO L85 PathProgramCache]: Analyzing trace with hash 67902732, now seen corresponding path program 1 times [2022-07-12 18:53:14,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:14,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427298941] [2022-07-12 18:53:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:14,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:14,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:14,582 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 18:53:14,583 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 18:53:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:14,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:53:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:14,643 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 18:53:14,715 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 18:53:14,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:14,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:14,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427298941] [2022-07-12 18:53:14,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427298941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:14,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:14,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:53:14,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852747151] [2022-07-12 18:53:14,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:14,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:53:14,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:14,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:53:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:53:14,717 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:14,947 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2022-07-12 18:53:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:53:14,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-12 18:53:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:14,949 INFO L225 Difference]: With dead ends: 89 [2022-07-12 18:53:14,949 INFO L226 Difference]: Without dead ends: 89 [2022-07-12 18:53:14,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:53:14,950 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 88 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:14,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 341 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:53:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-12 18:53:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-07-12 18:53:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 18:53:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2022-07-12 18:53:14,955 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 11 [2022-07-12 18:53:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:14,955 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2022-07-12 18:53:14,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2022-07-12 18:53:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:14,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:14,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:14,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-12 18:53:15,161 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 18:53:15,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:15,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:15,162 INFO L85 PathProgramCache]: Analyzing trace with hash 955407306, now seen corresponding path program 1 times [2022-07-12 18:53:15,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:15,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762915051] [2022-07-12 18:53:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:15,164 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 18:53:15,165 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 18:53:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:15,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:53:15,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:15,214 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 18:53:15,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:15,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:15,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762915051] [2022-07-12 18:53:15,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762915051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:15,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:15,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:53:15,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078463122] [2022-07-12 18:53:15,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:15,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:53:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:53:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:53:15,217 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:15,307 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-07-12 18:53:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:53:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-12 18:53:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:15,308 INFO L225 Difference]: With dead ends: 104 [2022-07-12 18:53:15,308 INFO L226 Difference]: Without dead ends: 101 [2022-07-12 18:53:15,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:53:15,309 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 42 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:15,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 180 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-12 18:53:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2022-07-12 18:53:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 74 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 18:53:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2022-07-12 18:53:15,314 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 11 [2022-07-12 18:53:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:15,314 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2022-07-12 18:53:15,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2022-07-12 18:53:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:53:15,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:15,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:15,325 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 18:53:15,515 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 18:53:15,515 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:15,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 955406412, now seen corresponding path program 1 times [2022-07-12 18:53:15,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:15,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688489155] [2022-07-12 18:53:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:15,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:15,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:15,517 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 18:53:15,526 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 18:53:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:15,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:53:15,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:15,594 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 18:53:15,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:15,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:15,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688489155] [2022-07-12 18:53:15,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688489155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:15,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:15,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:53:15,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248024305] [2022-07-12 18:53:15,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:15,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:53:15,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:53:15,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:15,596 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:15,620 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-07-12 18:53:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:53:15,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-12 18:53:15,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:15,621 INFO L225 Difference]: With dead ends: 61 [2022-07-12 18:53:15,621 INFO L226 Difference]: Without dead ends: 59 [2022-07-12 18:53:15,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:15,622 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:15,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 241 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:53:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-12 18:53:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-12 18:53:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 55 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-07-12 18:53:15,626 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2022-07-12 18:53:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:15,626 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-07-12 18:53:15,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-07-12 18:53:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 18:53:15,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:15,627 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:15,642 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 18:53:15,833 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 18:53:15,836 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:15,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash -39339339, now seen corresponding path program 1 times [2022-07-12 18:53:15,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:15,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818646275] [2022-07-12 18:53:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:15,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:15,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:15,839 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 18:53:15,840 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 18:53:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:53:15,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:15,915 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 18:53:16,029 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 18:53:16,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:16,634 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 18:53:16,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:16,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818646275] [2022-07-12 18:53:16,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818646275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:16,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:16,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-12 18:53:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327428676] [2022-07-12 18:53:16,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:16,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:53:16,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:53:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:53:16,635 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:17,309 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2022-07-12 18:53:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:53:17,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-07-12 18:53:17,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:17,311 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:53:17,311 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:53:17,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:53:17,312 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 268 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:17,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 391 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 191 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-07-12 18:53:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:53:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 68. [2022-07-12 18:53:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 64 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-07-12 18:53:17,316 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 14 [2022-07-12 18:53:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:17,317 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-07-12 18:53:17,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-07-12 18:53:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 18:53:17,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:17,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:17,326 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 18:53:17,523 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 18:53:17,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:17,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1216843566, now seen corresponding path program 1 times [2022-07-12 18:53:17,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:17,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485244853] [2022-07-12 18:53:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:17,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:17,525 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 18:53:17,526 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 18:53:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:17,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:53:17,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:17,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:17,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:17,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485244853] [2022-07-12 18:53:17,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485244853] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:17,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:17,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-12 18:53:17,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612123998] [2022-07-12 18:53:17,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:17,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:53:17,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:17,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:53:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:53:17,707 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:17,828 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-07-12 18:53:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:53:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-07-12 18:53:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:17,829 INFO L225 Difference]: With dead ends: 74 [2022-07-12 18:53:17,829 INFO L226 Difference]: Without dead ends: 74 [2022-07-12 18:53:17,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:53:17,830 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 137 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:17,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 207 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-12 18:53:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-07-12 18:53:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-07-12 18:53:17,833 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 22 [2022-07-12 18:53:17,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:17,833 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-07-12 18:53:17,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-07-12 18:53:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:53:17,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:17,834 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:17,850 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 18:53:18,040 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 18:53:18,040 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 18:53:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1294433228, now seen corresponding path program 2 times [2022-07-12 18:53:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:18,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823460848] [2022-07-12 18:53:18,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:53:18,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:18,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:18,042 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 18:53:18,043 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 18:53:18,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:53:18,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:53:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:53:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:18,141 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 18:53:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:18,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:19,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:19,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823460848] [2022-07-12 18:53:19,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823460848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:19,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:19,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-12 18:53:19,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875010286] [2022-07-12 18:53:19,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:19,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:53:19,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:53:19,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:53:19,841 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:21,988 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2022-07-12 18:53:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:53:21,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-07-12 18:53:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:21,990 INFO L225 Difference]: With dead ends: 105 [2022-07-12 18:53:21,990 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 18:53:21,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:53:21,991 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 284 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:21,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 511 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 338 Invalid, 0 Unknown, 69 Unchecked, 0.8s Time] [2022-07-12 18:53:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 18:53:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2022-07-12 18:53:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 66 states have (on average 1.378787878787879) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2022-07-12 18:53:21,996 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 23 [2022-07-12 18:53:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:21,996 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2022-07-12 18:53:21,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2022-07-12 18:53:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 18:53:21,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:21,997 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:22,006 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 18:53:22,209 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 18:53:22,210 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1064458770, now seen corresponding path program 2 times [2022-07-12 18:53:22,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:22,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258760128] [2022-07-12 18:53:22,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:53:22,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:22,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:22,212 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 18:53:22,213 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 18:53:22,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:53:22,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:53:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:53:22,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 18:53:22,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:22,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:22,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258760128] [2022-07-12 18:53:22,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258760128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:22,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:22,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:53:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978876761] [2022-07-12 18:53:22,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:22,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:53:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:53:22,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:53:22,299 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:22,349 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2022-07-12 18:53:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:53:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-07-12 18:53:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:22,350 INFO L225 Difference]: With dead ends: 126 [2022-07-12 18:53:22,350 INFO L226 Difference]: Without dead ends: 126 [2022-07-12 18:53:22,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 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 18:53:22,351 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 125 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:22,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 109 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:53:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-12 18:53:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 87. [2022-07-12 18:53:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.373134328358209) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-07-12 18:53:22,356 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 34 [2022-07-12 18:53:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:22,356 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-07-12 18:53:22,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 18:53:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-07-12 18:53:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 18:53:22,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:22,357 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:22,365 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 18:53:22,564 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 18:53:22,565 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:22,565 INFO L85 PathProgramCache]: Analyzing trace with hash 391656853, now seen corresponding path program 1 times [2022-07-12 18:53:22,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:22,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509709658] [2022-07-12 18:53:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:22,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:22,567 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 18:53:22,568 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 18:53:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:53:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:22,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:53:22,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:22,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509709658] [2022-07-12 18:53:22,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509709658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:22,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:22,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-12 18:53:22,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690762629] [2022-07-12 18:53:22,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:22,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:53:22,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:22,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:53:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:53:22,997 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:53:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:23,240 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2022-07-12 18:53:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:53:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-12 18:53:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:23,251 INFO L225 Difference]: With dead ends: 87 [2022-07-12 18:53:23,251 INFO L226 Difference]: Without dead ends: 87 [2022-07-12 18:53:23,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:53:23,252 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 155 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:23,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 403 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:53:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-12 18:53:23,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-12 18:53:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 83 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-07-12 18:53:23,261 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 38 [2022-07-12 18:53:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:23,263 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-07-12 18:53:23,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 18:53:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-07-12 18:53:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 18:53:23,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:23,264 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:23,271 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 18:53:23,471 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 18:53:23,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1227509228, now seen corresponding path program 3 times [2022-07-12 18:53:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:23,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861891867] [2022-07-12 18:53:23,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:53:23,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:23,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:23,473 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 18:53:23,474 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 18:53:23,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 18:53:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:53:23,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:53:23,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:23,659 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 18:53:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:24,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:29,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:29,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861891867] [2022-07-12 18:53:29,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861891867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:29,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:29,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2022-07-12 18:53:29,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750407087] [2022-07-12 18:53:29,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:29,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 18:53:29,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:29,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 18:53:29,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:53:29,485 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 36 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:33,272 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2022-07-12 18:53:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 18:53:33,272 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-07-12 18:53:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:33,273 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:53:33,273 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:53:33,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:53:33,275 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 968 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:33,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 672 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 691 Invalid, 0 Unknown, 109 Unchecked, 2.1s Time] [2022-07-12 18:53:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:53:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 85. [2022-07-12 18:53:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 81 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2022-07-12 18:53:33,281 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 41 [2022-07-12 18:53:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:33,282 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2022-07-12 18:53:33,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2022-07-12 18:53:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:53:33,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:33,288 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:33,313 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 18:53:33,503 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 18:53:33,503 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1389862613, now seen corresponding path program 2 times [2022-07-12 18:53:33,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:33,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32758341] [2022-07-12 18:53:33,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:53:33,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:33,505 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 18:53:33,506 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 18:53:33,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:53:33,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:53:33,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:53:33,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:33,643 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 18:53:33,740 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:53:33,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-12 18:53:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:53:33,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:53:33,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:33,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32758341] [2022-07-12 18:53:33,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32758341] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:33,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:33,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-12 18:53:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971612288] [2022-07-12 18:53:33,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:33,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:53:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:53:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:53:33,874 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:34,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:34,053 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-07-12 18:53:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:53:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-07-12 18:53:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:34,054 INFO L225 Difference]: With dead ends: 137 [2022-07-12 18:53:34,054 INFO L226 Difference]: Without dead ends: 135 [2022-07-12 18:53:34,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:53:34,055 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 70 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:34,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 307 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-07-12 18:53:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-12 18:53:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 85. [2022-07-12 18:53:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 68 states have (on average 1.25) internal successors, (85), 80 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:34,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-12 18:53:34,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 50 [2022-07-12 18:53:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:34,058 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-12 18:53:34,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-12 18:53:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 18:53:34,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:34,059 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:34,068 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 18:53:34,266 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 18:53:34,266 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:34,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1389862614, now seen corresponding path program 1 times [2022-07-12 18:53:34,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:34,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574457572] [2022-07-12 18:53:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:34,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:34,268 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 18:53:34,272 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 18:53:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:34,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:53:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:34,397 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 18:53:34,402 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 18:53:34,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:53:34,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:53:34,652 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:34,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:53:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:53:34,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:35,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:35,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574457572] [2022-07-12 18:53:35,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574457572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:35,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1038229965] [2022-07-12 18:53:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:35,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:35,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:53:35,073 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 18:53:35,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-07-12 18:53:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:35,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:53:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:35,330 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 18:53:35,334 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 18:53:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:53:35,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 18:53:35,557 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:35,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-12 18:53:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:53:35,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:35,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1038229965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:35,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:35,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-07-12 18:53:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656749541] [2022-07-12 18:53:35,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:35,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 18:53:35,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 18:53:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:53:35,798 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:36,225 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2022-07-12 18:53:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:53:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-07-12 18:53:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:36,226 INFO L225 Difference]: With dead ends: 206 [2022-07-12 18:53:36,226 INFO L226 Difference]: Without dead ends: 206 [2022-07-12 18:53:36,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:53:36,227 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 150 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:36,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 476 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 333 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-07-12 18:53:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-12 18:53:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 89. [2022-07-12 18:53:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 18:53:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-07-12 18:53:36,230 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 50 [2022-07-12 18:53:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:36,230 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-07-12 18:53:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-07-12 18:53:36,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:53:36,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:36,231 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:36,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-07-12 18:53:36,450 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 18:53:36,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:36,643 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:36,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash -76906781, now seen corresponding path program 1 times [2022-07-12 18:53:36,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:36,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785328444] [2022-07-12 18:53:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:36,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:36,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:36,645 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 18:53:36,646 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 18:53:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:53:36,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-12 18:53:36,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:36,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:36,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785328444] [2022-07-12 18:53:36,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785328444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:36,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:36,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:53:36,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248213479] [2022-07-12 18:53:36,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:36,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:53:36,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:53:36,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:53:36,787 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:53:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:36,814 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2022-07-12 18:53:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:53:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-07-12 18:53:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:36,815 INFO L225 Difference]: With dead ends: 120 [2022-07-12 18:53:36,815 INFO L226 Difference]: Without dead ends: 120 [2022-07-12 18:53:36,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 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 18:53:36,815 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 23 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:36,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 270 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:53:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-12 18:53:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2022-07-12 18:53:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.236842105263158) internal successors, (94), 87 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:53:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2022-07-12 18:53:36,818 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 52 [2022-07-12 18:53:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:36,818 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2022-07-12 18:53:36,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 18:53:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2022-07-12 18:53:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 18:53:36,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:36,819 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:36,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-12 18:53:37,020 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 18:53:37,020 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1665903554, now seen corresponding path program 1 times [2022-07-12 18:53:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:37,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404373764] [2022-07-12 18:53:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:37,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:37,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:37,022 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 18:53:37,023 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 18:53:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:37,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 18:53:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:53:37,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:53:37,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404373764] [2022-07-12 18:53:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404373764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:53:37,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:53:37,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:53:37,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163916592] [2022-07-12 18:53:37,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:53:37,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:53:37,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:53:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:53:37,138 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:37,185 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2022-07-12 18:53:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:53:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-07-12 18:53:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:37,186 INFO L225 Difference]: With dead ends: 115 [2022-07-12 18:53:37,186 INFO L226 Difference]: Without dead ends: 115 [2022-07-12 18:53:37,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 18:53:37,186 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 39 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:37,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 152 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:53:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-12 18:53:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2022-07-12 18:53:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 89 states have internal predecessors, (96), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-12 18:53:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-07-12 18:53:37,189 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 52 [2022-07-12 18:53:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:37,189 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-07-12 18:53:37,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 18:53:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-07-12 18:53:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 18:53:37,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:37,190 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:37,199 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 18:53:37,390 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 18:53:37,390 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:37,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash 584357413, now seen corresponding path program 1 times [2022-07-12 18:53:37,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:37,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311217874] [2022-07-12 18:53:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:37,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:37,392 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 18:53:37,393 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 18:53:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:37,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:53:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:37,509 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 18:53:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:53:37,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:53:37,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:37,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311217874] [2022-07-12 18:53:37,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311217874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:37,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:37,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-12 18:53:37,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811395136] [2022-07-12 18:53:37,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:37,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:53:37,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:53:37,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:53:37,666 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:37,816 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2022-07-12 18:53:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:53:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-07-12 18:53:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:37,817 INFO L225 Difference]: With dead ends: 131 [2022-07-12 18:53:37,817 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 18:53:37,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:53:37,818 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 43 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:37,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 324 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-07-12 18:53:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 18:53:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2022-07-12 18:53:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 91 states have (on average 1.2637362637362637) internal successors, (115), 102 states have internal predecessors, (115), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 18:53:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 126 transitions. [2022-07-12 18:53:37,821 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 126 transitions. Word has length 55 [2022-07-12 18:53:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:37,821 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 126 transitions. [2022-07-12 18:53:37,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 18:53:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 126 transitions. [2022-07-12 18:53:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 18:53:37,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:37,822 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:37,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-12 18:53:38,030 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 18:53:38,030 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash 584357414, now seen corresponding path program 1 times [2022-07-12 18:53:38,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:38,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662906923] [2022-07-12 18:53:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:38,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:38,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:38,032 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 18:53:38,032 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 18:53:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:53:38,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:38,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 18:53:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:53:38,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-12 18:53:39,091 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:39,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662906923] [2022-07-12 18:53:39,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662906923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:39,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:39,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-12 18:53:39,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764185852] [2022-07-12 18:53:39,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:39,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:53:39,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:53:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:53:39,092 INFO L87 Difference]: Start difference. First operand 111 states and 126 transitions. Second operand has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:53:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:39,997 INFO L93 Difference]: Finished difference Result 163 states and 177 transitions. [2022-07-12 18:53:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 18:53:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2022-07-12 18:53:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:39,999 INFO L225 Difference]: With dead ends: 163 [2022-07-12 18:53:39,999 INFO L226 Difference]: Without dead ends: 163 [2022-07-12 18:53:39,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-12 18:53:40,000 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 208 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:40,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 556 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 250 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-07-12 18:53:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-12 18:53:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 128. [2022-07-12 18:53:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.3425925925925926) internal successors, (145), 119 states have internal predecessors, (145), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-12 18:53:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 156 transitions. [2022-07-12 18:53:40,004 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 156 transitions. Word has length 55 [2022-07-12 18:53:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:40,004 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 156 transitions. [2022-07-12 18:53:40,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:53:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 156 transitions. [2022-07-12 18:53:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:53:40,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:40,005 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:53:40,020 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 18:53:40,213 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 18:53:40,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:40,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash -675254106, now seen corresponding path program 1 times [2022-07-12 18:53:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:40,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962685303] [2022-07-12 18:53:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:40,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:40,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:40,215 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 18:53:40,218 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 18:53:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:40,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:53:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:53:40,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-12 18:53:40,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962685303] [2022-07-12 18:53:40,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962685303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:53:40,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:53:40,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 18:53:40,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320161219] [2022-07-12 18:53:40,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:53:40,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:53:40,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:53:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:53:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:53:40,480 INFO L87 Difference]: Start difference. First operand 128 states and 156 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:53:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:40,590 INFO L93 Difference]: Finished difference Result 320 states and 408 transitions. [2022-07-12 18:53:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:53:40,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-07-12 18:53:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:40,592 INFO L225 Difference]: With dead ends: 320 [2022-07-12 18:53:40,592 INFO L226 Difference]: Without dead ends: 320 [2022-07-12 18:53:40,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:53:40,593 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 314 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:40,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 272 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:53:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-12 18:53:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 160. [2022-07-12 18:53:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 136 states have (on average 1.3308823529411764) internal successors, (181), 145 states have internal predecessors, (181), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-12 18:53:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2022-07-12 18:53:40,599 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 56 [2022-07-12 18:53:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:40,600 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2022-07-12 18:53:40,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 18:53:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2022-07-12 18:53:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 18:53:40,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:40,601 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 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 18:53:40,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-12 18:53:40,808 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 18:53:40,808 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-07-12 18:53:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash 935210686, now seen corresponding path program 1 times [2022-07-12 18:53:40,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:40,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77888736] [2022-07-12 18:53:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:40,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:40,810 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 18:53:40,812 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 18:53:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:40,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-12 18:53:40,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:40,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-12 18:53:41,025 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-12 18:53:41,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-07-12 18:53:41,056 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:53:41,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:53:41,084 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:53:41,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:53:41,113 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:53:41,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:53:41,141 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:53:41,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:53:41,195 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:53:41,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:53:41,226 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:53:41,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:53:41,258 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:53:41,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-12 18:53:41,290 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-07-12 18:53:41,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-12 18:53:41,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 18:53:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:53:41,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:44,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 84 [2022-07-12 18:53:47,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202258599903212 treesize of output 202241420034028