./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.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 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:25:12,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:25:12,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:25:12,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:25:12,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:25:12,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:25:12,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:25:12,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:25:12,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:25:12,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:25:12,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:25:12,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:25:12,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:25:12,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:25:12,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:25:12,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:25:12,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:25:12,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:25:12,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:25:12,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:25:12,513 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:25:12,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:25:12,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:25:12,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:25:12,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:25:12,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:25:12,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:25:12,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:25:12,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:25:12,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:25:12,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:25:12,525 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:25:12,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:25:12,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:25:12,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:25:12,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:25:12,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:25:12,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:25:12,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:25:12,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:25:12,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:25:12,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:25:12,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:25:12,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:25:12,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:25:12,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:25:12,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:25:12,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:25:12,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:25:12,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:25:12,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:25:12,573 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:25:12,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:25:12,574 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:25:12,574 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:25:12,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:25:12,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:25:12,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:25:12,580 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:25:12,580 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:25:12,581 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:25:12,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:25:12,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:25:12,581 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:25:12,581 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:25:12,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:25:12,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:25:12,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:25:12,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:25:12,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:25:12,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:25:12,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:25:12,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:25:12,583 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2022-07-21 17:25:12,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:25:12,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:25:12,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:25:12,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:25:12,920 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:25:12,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-07-21 17:25:12,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c861fc412/a06e588483064ccdacbad8d78d16aa32/FLAG34f589d6b [2022-07-21 17:25:13,518 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:25:13,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-07-21 17:25:13,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c861fc412/a06e588483064ccdacbad8d78d16aa32/FLAG34f589d6b [2022-07-21 17:25:13,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c861fc412/a06e588483064ccdacbad8d78d16aa32 [2022-07-21 17:25:13,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:25:13,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:25:13,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:25:13,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:25:13,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:25:13,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:25:13" (1/1) ... [2022-07-21 17:25:13,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8a8fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:13, skipping insertion in model container [2022-07-21 17:25:13,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:25:13" (1/1) ... [2022-07-21 17:25:13,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:25:13,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:25:14,212 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:25:14,228 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-21 17:25:14,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c9e8347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:14, skipping insertion in model container [2022-07-21 17:25:14,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:25:14,229 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-21 17:25:14,231 INFO L158 Benchmark]: Toolchain (without parser) took 412.78ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 22.2MB in the beginning and 38.0MB in the end (delta: -15.9MB). Peak memory consumption was 1.7MB. Max. memory is 16.1GB. [2022-07-21 17:25:14,231 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 48.2MB. Free memory was 30.4MB in the beginning and 30.3MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:25:14,232 INFO L158 Benchmark]: CACSL2BoogieTranslator took 406.28ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 32.9MB in the beginning and 38.0MB in the end (delta: -5.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-21 17:25:14,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 48.2MB. Free memory was 30.4MB in the beginning and 30.3MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 406.28ms. Allocated memory was 48.2MB in the beginning and 58.7MB in the end (delta: 10.5MB). Free memory was 32.9MB in the beginning and 38.0MB in the end (delta: -5.2MB). 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_3.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 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:25:15,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:25:15,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:25:16,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:25:16,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:25:16,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:25:16,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:25:16,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:25:16,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:25:16,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:25:16,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:25:16,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:25:16,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:25:16,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:25:16,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:25:16,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:25:16,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:25:16,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:25:16,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:25:16,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:25:16,043 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:25:16,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:25:16,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:25:16,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:25:16,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:25:16,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:25:16,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:25:16,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:25:16,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:25:16,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:25:16,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:25:16,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:25:16,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:25:16,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:25:16,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:25:16,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:25:16,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:25:16,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:25:16,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:25:16,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:25:16,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:25:16,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:25:16,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:25:16,093 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:25:16,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:25:16,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:25:16,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:25:16,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:25:16,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:25:16,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:25:16,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:25:16,096 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:25:16,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:25:16,097 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:25:16,097 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:25:16,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:25:16,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:25:16,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:25:16,098 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:25:16,098 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:25:16,098 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:25:16,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:25:16,099 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:25:16,099 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:25:16,099 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:25:16,099 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:25:16,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:25:16,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:25:16,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:25:16,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:25:16,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:25:16,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:25:16,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:25:16,101 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:25:16,101 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:25:16,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:25:16,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2022-07-21 17:25:16,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:25:16,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:25:16,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:25:16,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:25:16,467 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:25:16,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-07-21 17:25:16,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1072fa66e/15b1d6d8200c4236ad6b4df58ad7f833/FLAG720864f65 [2022-07-21 17:25:17,060 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:25:17,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-07-21 17:25:17,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1072fa66e/15b1d6d8200c4236ad6b4df58ad7f833/FLAG720864f65 [2022-07-21 17:25:17,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1072fa66e/15b1d6d8200c4236ad6b4df58ad7f833 [2022-07-21 17:25:17,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:25:17,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:25:17,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:25:17,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:25:17,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:25:17,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:17,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ceb407e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17, skipping insertion in model container [2022-07-21 17:25:17,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:17,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:25:17,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:25:17,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:25:17,784 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 17:25:17,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:25:17,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:25:17,863 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:25:17,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:25:17,983 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:25:17,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17 WrapperNode [2022-07-21 17:25:17,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:25:17,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:25:17,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:25:17,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:25:17,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,042 INFO L137 Inliner]: procedures = 166, calls = 76, calls flagged for inlining = 22, calls inlined = 4, statements flattened = 70 [2022-07-21 17:25:18,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:25:18,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:25:18,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:25:18,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:25:18,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:25:18,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:25:18,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:25:18,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:25:18,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (1/1) ... [2022-07-21 17:25:18,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:25:18,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:25:18,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:25:18,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:25:18,170 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-21 17:25:18,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-21 17:25:18,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:25:18,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:25:18,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:25:18,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:25:18,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:25:18,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:25:18,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:25:18,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:25:18,328 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:25:18,344 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:25:18,586 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:25:18,594 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:25:18,595 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 17:25:18,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:25:18 BoogieIcfgContainer [2022-07-21 17:25:18,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:25:18,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:25:18,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:25:18,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:25:18,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:25:17" (1/3) ... [2022-07-21 17:25:18,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6f9b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:25:18, skipping insertion in model container [2022-07-21 17:25:18,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:25:17" (2/3) ... [2022-07-21 17:25:18,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6f9b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:25:18, skipping insertion in model container [2022-07-21 17:25:18,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:25:18" (3/3) ... [2022-07-21 17:25:18,605 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_3.i [2022-07-21 17:25:18,617 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:25:18,617 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-07-21 17:25:18,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:25:18,687 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@38e3384e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@22d614bf [2022-07-21 17:25:18,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-07-21 17:25:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 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) [2022-07-21 17:25:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:25:18,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:18,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:18,697 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash 714233942, now seen corresponding path program 1 times [2022-07-21 17:25:18,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:18,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138031779] [2022-07-21 17:25:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:18,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:18,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:18,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:18,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:25:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:25:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:18,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:18,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:18,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138031779] [2022-07-21 17:25:18,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138031779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:18,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:18,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:25:18,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494107111] [2022-07-21 17:25:18,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:18,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:25:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:25:18,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:18,923 INFO L87 Difference]: Start difference. First operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 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) [2022-07-21 17:25:19,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:19,034 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2022-07-21 17:25:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:25:19,037 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 [2022-07-21 17:25:19,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:19,044 INFO L225 Difference]: With dead ends: 98 [2022-07-21 17:25:19,044 INFO L226 Difference]: Without dead ends: 94 [2022-07-21 17:25:19,046 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 [2022-07-21 17:25:19,048 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:19,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 199 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-21 17:25:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2022-07-21 17:25:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 49 states have internal predecessors, (55), 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) [2022-07-21 17:25:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-07-21 17:25:19,079 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 11 [2022-07-21 17:25:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:19,080 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-07-21 17:25:19,080 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) [2022-07-21 17:25:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-07-21 17:25:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:25:19,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:19,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:19,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 17:25:19,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:19,289 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:19,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash 714155687, now seen corresponding path program 1 times [2022-07-21 17:25:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:19,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576695827] [2022-07-21 17:25:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:19,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:19,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:19,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:25:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:19,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:25:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:19,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:19,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:19,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:19,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576695827] [2022-07-21 17:25:19,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576695827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:19,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:19,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:25:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632229424] [2022-07-21 17:25:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:19,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:25:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:25:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:19,447 INFO L87 Difference]: Start difference. First operand 54 states and 61 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) [2022-07-21 17:25:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:19,627 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-07-21 17:25:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:25:19,628 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 [2022-07-21 17:25:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:19,629 INFO L225 Difference]: With dead ends: 67 [2022-07-21 17:25:19,629 INFO L226 Difference]: Without dead ends: 67 [2022-07-21 17:25:19,629 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 [2022-07-21 17:25:19,630 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:19,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:25:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-21 17:25:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-07-21 17:25:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 58 states have internal predecessors, (69), 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) [2022-07-21 17:25:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-21 17:25:19,638 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 11 [2022-07-21 17:25:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:19,638 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-21 17:25:19,638 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) [2022-07-21 17:25:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-21 17:25:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:25:19,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:19,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:19,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:19,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:19,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash 714155688, now seen corresponding path program 1 times [2022-07-21 17:25:19,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:19,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014795355] [2022-07-21 17:25:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:19,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:19,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:19,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:25:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:19,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:25:19,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:19,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:20,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:20,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:20,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014795355] [2022-07-21 17:25:20,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014795355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:20,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:20,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 17:25:20,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973177997] [2022-07-21 17:25:20,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:25:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:25:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:25:20,030 INFO L87 Difference]: Start difference. First operand 63 states and 75 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) [2022-07-21 17:25:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:20,321 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-07-21 17:25:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:25:20,321 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 [2022-07-21 17:25:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:20,323 INFO L225 Difference]: With dead ends: 82 [2022-07-21 17:25:20,323 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 17:25:20,323 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 [2022-07-21 17:25:20,324 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:20,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 223 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:25:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 17:25:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2022-07-21 17:25:20,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 68 states have internal predecessors, (82), 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) [2022-07-21 17:25:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-07-21 17:25:20,343 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 11 [2022-07-21 17:25:20,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:20,343 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-07-21 17:25:20,344 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) [2022-07-21 17:25:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-07-21 17:25:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:25:20,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:20,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:20,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:20,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1601737623, now seen corresponding path program 1 times [2022-07-21 17:25:20,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:20,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414007135] [2022-07-21 17:25:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:20,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:20,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:20,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:20,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:25:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:20,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:25:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:20,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:20,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:20,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414007135] [2022-07-21 17:25:20,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414007135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:20,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:20,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:25:20,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980214369] [2022-07-21 17:25:20,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:20,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:25:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:25:20,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:25:20,631 INFO L87 Difference]: Start difference. First operand 73 states and 88 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) [2022-07-21 17:25:20,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:20,728 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-07-21 17:25:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:25:20,728 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 [2022-07-21 17:25:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:20,730 INFO L225 Difference]: With dead ends: 106 [2022-07-21 17:25:20,730 INFO L226 Difference]: Without dead ends: 104 [2022-07-21 17:25:20,731 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 [2022-07-21 17:25:20,732 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:20,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-21 17:25:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2022-07-21 17:25:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5) internal successors, (81), 68 states have internal predecessors, (81), 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) [2022-07-21 17:25:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-07-21 17:25:20,740 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 11 [2022-07-21 17:25:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:20,741 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-07-21 17:25:20,741 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) [2022-07-21 17:25:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-07-21 17:25:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:25:20,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:20,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:20,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:20,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:20,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:20,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1601659368, now seen corresponding path program 1 times [2022-07-21 17:25:20,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:20,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717465567] [2022-07-21 17:25:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:20,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:20,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:20,951 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:20,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:25:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:20,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:25:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:21,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:21,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:21,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717465567] [2022-07-21 17:25:21,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717465567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:21,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:21,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:25:21,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671845740] [2022-07-21 17:25:21,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:21,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:25:21,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:25:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:21,031 INFO L87 Difference]: Start difference. First operand 73 states and 87 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) [2022-07-21 17:25:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:21,070 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-07-21 17:25:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:25:21,071 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 [2022-07-21 17:25:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:21,073 INFO L225 Difference]: With dead ends: 61 [2022-07-21 17:25:21,073 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 17:25:21,073 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 [2022-07-21 17:25:21,082 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:21,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 208 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:25:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 17:25:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-21 17:25:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 55 states have internal predecessors, (61), 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) [2022-07-21 17:25:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-07-21 17:25:21,098 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2022-07-21 17:25:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:21,098 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-07-21 17:25:21,098 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) [2022-07-21 17:25:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-07-21 17:25:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:25:21,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:21,099 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:21,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:21,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:21,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1855917097, now seen corresponding path program 1 times [2022-07-21 17:25:21,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:21,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359732075] [2022-07-21 17:25:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:21,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:21,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:21,310 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:21,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:25:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:21,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:25:21,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:21,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:21,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:22,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:22,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359732075] [2022-07-21 17:25:22,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359732075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:22,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:22,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-07-21 17:25:22,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409527613] [2022-07-21 17:25:22,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:22,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:25:22,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:22,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:25:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:25:22,354 INFO L87 Difference]: Start difference. First operand 59 states and 66 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) [2022-07-21 17:25:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:23,135 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-07-21 17:25:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:25:23,136 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 [2022-07-21 17:25:23,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:23,137 INFO L225 Difference]: With dead ends: 97 [2022-07-21 17:25:23,137 INFO L226 Difference]: Without dead ends: 97 [2022-07-21 17:25:23,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:25:23,137 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 227 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:23,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 261 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-07-21 17:25:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-21 17:25:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2022-07-21 17:25:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.44) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:25:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-07-21 17:25:23,143 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 14 [2022-07-21 17:25:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:23,143 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-07-21 17:25:23,144 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) [2022-07-21 17:25:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-07-21 17:25:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 17:25:23,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:23,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:23,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:23,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:23,353 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash 854181427, now seen corresponding path program 1 times [2022-07-21 17:25:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266213342] [2022-07-21 17:25:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:23,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:23,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:23,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:23,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:25:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:25:23,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:23,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:23,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266213342] [2022-07-21 17:25:23,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266213342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:23,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:23,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 17:25:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364057755] [2022-07-21 17:25:23,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:23,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:25:23,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:25:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:25:23,558 INFO L87 Difference]: Start difference. First operand 68 states and 77 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) [2022-07-21 17:25:23,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:23,721 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-07-21 17:25:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:25:23,722 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 [2022-07-21 17:25:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:23,722 INFO L225 Difference]: With dead ends: 74 [2022-07-21 17:25:23,722 INFO L226 Difference]: Without dead ends: 74 [2022-07-21 17:25:23,723 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 [2022-07-21 17:25:23,723 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 67 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:23,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 232 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-21 17:25:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-07-21 17:25:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 69 states have internal predecessors, (76), 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) [2022-07-21 17:25:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2022-07-21 17:25:23,728 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 22 [2022-07-21 17:25:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:23,728 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2022-07-21 17:25:23,728 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) [2022-07-21 17:25:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2022-07-21 17:25:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:25:23,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:23,729 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:23,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:23,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:23,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1071704552, now seen corresponding path program 2 times [2022-07-21 17:25:23,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:23,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759527527] [2022-07-21 17:25:23,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:25:23,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:23,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:23,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:23,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:25:23,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:25:23,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:25:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:25:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:24,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:24,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:26,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:26,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759527527] [2022-07-21 17:25:26,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759527527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:26,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:26,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-21 17:25:26,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851540814] [2022-07-21 17:25:26,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:26,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 17:25:26,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 17:25:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:25:26,086 INFO L87 Difference]: Start difference. First operand 73 states and 81 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) [2022-07-21 17:25:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:28,670 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-07-21 17:25:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:25:28,670 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 [2022-07-21 17:25:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:28,671 INFO L225 Difference]: With dead ends: 91 [2022-07-21 17:25:28,671 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 17:25:28,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 17:25:28,672 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 314 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:28,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 393 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 374 Invalid, 0 Unknown, 85 Unchecked, 1.0s Time] [2022-07-21 17:25:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 17:25:28,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-07-21 17:25:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 82 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) [2022-07-21 17:25:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2022-07-21 17:25:28,678 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 23 [2022-07-21 17:25:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:28,678 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2022-07-21 17:25:28,679 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) [2022-07-21 17:25:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2022-07-21 17:25:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:25:28,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:28,680 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:28,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:28,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:28,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1134263027, now seen corresponding path program 2 times [2022-07-21 17:25:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:28,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511396293] [2022-07-21 17:25:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:25:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:28,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:28,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:25:28,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:25:28,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:25:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:25:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-21 17:25:28,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:28,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:28,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511396293] [2022-07-21 17:25:28,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511396293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:28,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:28,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:25:28,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947118183] [2022-07-21 17:25:28,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:29,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:25:29,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:29,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:25:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:25:29,001 INFO L87 Difference]: Start difference. First operand 86 states and 97 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) [2022-07-21 17:25:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:29,052 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2022-07-21 17:25:29,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:25:29,054 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 [2022-07-21 17:25:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:29,055 INFO L225 Difference]: With dead ends: 114 [2022-07-21 17:25:29,055 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 17:25:29,055 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 [2022-07-21 17:25:29,056 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 104 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:29,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 97 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:25:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 17:25:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2022-07-21 17:25:29,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 77 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) [2022-07-21 17:25:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-07-21 17:25:29,060 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 34 [2022-07-21 17:25:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:29,060 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-07-21 17:25:29,061 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) [2022-07-21 17:25:29,061 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-07-21 17:25:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 17:25:29,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:29,062 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] [2022-07-21 17:25:29,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:29,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:29,271 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash 269265368, now seen corresponding path program 1 times [2022-07-21 17:25:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:29,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076691236] [2022-07-21 17:25:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:29,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:29,273 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:29,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 17:25:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:25:29,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:29,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:25:29,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:29,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076691236] [2022-07-21 17:25:29,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076691236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:29,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:29,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-21 17:25:29,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014021482] [2022-07-21 17:25:29,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:29,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:25:29,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:29,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:25:29,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:25:29,795 INFO L87 Difference]: Start difference. First operand 81 states and 90 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) [2022-07-21 17:25:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:30,116 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-07-21 17:25:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:25:30,116 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 [2022-07-21 17:25:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:30,117 INFO L225 Difference]: With dead ends: 81 [2022-07-21 17:25:30,117 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 17:25:30,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:25:30,118 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 84 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:30,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 361 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:25:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 17:25:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-21 17:25:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 77 states have internal predecessors, (81), 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) [2022-07-21 17:25:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2022-07-21 17:25:30,123 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 38 [2022-07-21 17:25:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:30,123 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2022-07-21 17:25:30,123 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) [2022-07-21 17:25:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2022-07-21 17:25:30,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 17:25:30,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:30,125 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:25:30,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:30,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:30,332 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:30,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1255484104, now seen corresponding path program 3 times [2022-07-21 17:25:30,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:30,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006050540] [2022-07-21 17:25:30,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:25:30,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:30,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:30,339 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:30,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:25:30,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-21 17:25:30,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:25:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:25:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:30,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:31,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:25:34,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:34,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006050540] [2022-07-21 17:25:34,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006050540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:34,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:34,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-07-21 17:25:34,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373243828] [2022-07-21 17:25:34,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:34,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 17:25:34,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:34,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 17:25:34,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 17:25:34,375 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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) [2022-07-21 17:25:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:38,228 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-07-21 17:25:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:25:38,229 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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 [2022-07-21 17:25:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:38,229 INFO L225 Difference]: With dead ends: 115 [2022-07-21 17:25:38,230 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 17:25:38,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 17:25:38,231 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 699 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:38,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 614 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 852 Invalid, 0 Unknown, 109 Unchecked, 2.0s Time] [2022-07-21 17:25:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 17:25:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2022-07-21 17:25:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 75 states have internal predecessors, (78), 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) [2022-07-21 17:25:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-07-21 17:25:38,236 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 41 [2022-07-21 17:25:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:38,236 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-07-21 17:25:38,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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) [2022-07-21 17:25:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-07-21 17:25:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:25:38,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:38,238 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] [2022-07-21 17:25:38,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:38,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:38,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1908613480, now seen corresponding path program 2 times [2022-07-21 17:25:38,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:38,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735772416] [2022-07-21 17:25:38,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:25:38,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:38,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:38,451 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:38,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:25:38,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:25:38,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:25:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:25:38,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:38,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:38,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:25:40,944 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 [2022-07-21 17:25:40,955 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:25:40,955 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 [2022-07-21 17:25:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 17:25:41,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:43,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:43,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735772416] [2022-07-21 17:25:43,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735772416] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:25:43,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605062666] [2022-07-21 17:25:43,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:25:43,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:25:43,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:25:43,511 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:25:43,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-21 17:25:43,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:25:43,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:25:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:25:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:43,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:43,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:44,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:25:44,182 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 [2022-07-21 17:25:44,197 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:25:44,198 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 [2022-07-21 17:25:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 17:25:44,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:46,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1605062666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:25:46,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:46,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-07-21 17:25:46,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204646805] [2022-07-21 17:25:46,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:46,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:25:46,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:46,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:25:46,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=127, Unknown=2, NotChecked=0, Total=156 [2022-07-21 17:25:46,734 INFO L87 Difference]: Start difference. First operand 79 states and 83 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) [2022-07-21 17:25:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:47,306 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2022-07-21 17:25:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:25:47,307 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 [2022-07-21 17:25:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:47,308 INFO L225 Difference]: With dead ends: 168 [2022-07-21 17:25:47,308 INFO L226 Difference]: Without dead ends: 168 [2022-07-21 17:25:47,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=43, Invalid=195, Unknown=2, NotChecked=0, Total=240 [2022-07-21 17:25:47,309 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 92 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:47,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 451 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 380 Invalid, 0 Unknown, 53 Unchecked, 0.5s Time] [2022-07-21 17:25:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-21 17:25:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2022-07-21 17:25:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 93 states have (on average 1.3870967741935485) internal successors, (129), 105 states have internal predecessors, (129), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 17:25:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2022-07-21 17:25:47,314 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 50 [2022-07-21 17:25:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:47,314 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2022-07-21 17:25:47,314 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) [2022-07-21 17:25:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2022-07-21 17:25:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:25:47,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:47,321 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] [2022-07-21 17:25:47,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:47,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:47,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:47,725 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:47,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1908613481, now seen corresponding path program 1 times [2022-07-21 17:25:47,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:47,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570186848] [2022-07-21 17:25:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:47,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:47,727 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:47,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 17:25:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:47,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:25:47,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:47,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:25:48,067 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:25:48,067 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 [2022-07-21 17:25:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 17:25:48,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 17:25:48,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:48,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570186848] [2022-07-21 17:25:48,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570186848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:48,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:48,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-21 17:25:48,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564222294] [2022-07-21 17:25:48,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:48,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:25:48,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:48,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:25:48,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:25:48,294 INFO L87 Difference]: Start difference. First operand 112 states and 140 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) [2022-07-21 17:25:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:48,598 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-07-21 17:25:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:25:48,599 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 [2022-07-21 17:25:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:48,600 INFO L225 Difference]: With dead ends: 124 [2022-07-21 17:25:48,600 INFO L226 Difference]: Without dead ends: 124 [2022-07-21 17:25:48,600 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 [2022-07-21 17:25:48,601 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 51 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:48,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 311 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-07-21 17:25:48,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-21 17:25:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2022-07-21 17:25:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 91 states have internal predecessors, (102), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 17:25:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2022-07-21 17:25:48,605 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 50 [2022-07-21 17:25:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:48,605 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2022-07-21 17:25:48,605 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) [2022-07-21 17:25:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2022-07-21 17:25:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:25:48,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:48,607 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] [2022-07-21 17:25:48,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:48,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:48,807 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash -226568731, now seen corresponding path program 1 times [2022-07-21 17:25:48,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:48,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084118755] [2022-07-21 17:25:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:48,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:48,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:48,810 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:48,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 17:25:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:48,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:25:48,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:25:48,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:48,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:48,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084118755] [2022-07-21 17:25:48,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084118755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:48,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:48,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:25:48,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327178861] [2022-07-21 17:25:48,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:48,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:25:48,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:25:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:25:48,962 INFO L87 Difference]: Start difference. First operand 98 states and 113 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) [2022-07-21 17:25:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:49,021 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2022-07-21 17:25:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:25:49,022 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 [2022-07-21 17:25:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:49,023 INFO L225 Difference]: With dead ends: 118 [2022-07-21 17:25:49,023 INFO L226 Difference]: Without dead ends: 118 [2022-07-21 17:25:49,023 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 [2022-07-21 17:25:49,024 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 16 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:49,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 194 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:25:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-21 17:25:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2022-07-21 17:25:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 92 states have internal predecessors, (103), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 17:25:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2022-07-21 17:25:49,027 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 52 [2022-07-21 17:25:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:49,028 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2022-07-21 17:25:49,028 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) [2022-07-21 17:25:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2022-07-21 17:25:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 17:25:49,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:49,028 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] [2022-07-21 17:25:49,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:49,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:49,238 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:49,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:49,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1516241604, now seen corresponding path program 1 times [2022-07-21 17:25:49,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093205348] [2022-07-21 17:25:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:49,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:49,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:49,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:49,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 17:25:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:49,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:25:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-21 17:25:49,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:25:49,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:49,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093205348] [2022-07-21 17:25:49,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093205348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:25:49,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:25:49,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:25:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102346789] [2022-07-21 17:25:49,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:25:49,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:25:49,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:49,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:25:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:25:49,395 INFO L87 Difference]: Start difference. First operand 100 states and 114 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) [2022-07-21 17:25:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:49,477 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-07-21 17:25:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:25:49,478 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 [2022-07-21 17:25:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:49,479 INFO L225 Difference]: With dead ends: 113 [2022-07-21 17:25:49,479 INFO L226 Difference]: Without dead ends: 113 [2022-07-21 17:25:49,479 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 [2022-07-21 17:25:49,480 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 21 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:49,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 138 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-21 17:25:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-07-21 17:25:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 94 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-21 17:25:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2022-07-21 17:25:49,483 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 52 [2022-07-21 17:25:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:49,483 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2022-07-21 17:25:49,483 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) [2022-07-21 17:25:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2022-07-21 17:25:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:25:49,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:49,484 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] [2022-07-21 17:25:49,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:49,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:49,685 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:49,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:49,685 INFO L85 PathProgramCache]: Analyzing trace with hash -840525585, now seen corresponding path program 1 times [2022-07-21 17:25:49,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:49,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386725621] [2022-07-21 17:25:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:49,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:49,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:49,687 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:49,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 17:25:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:25:49,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-21 17:25:49,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-21 17:25:50,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:50,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386725621] [2022-07-21 17:25:50,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386725621] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:50,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:50,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 17:25:50,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453959223] [2022-07-21 17:25:50,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:50,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:25:50,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:50,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:25:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:25:50,029 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-07-21 17:25:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:50,190 INFO L93 Difference]: Finished difference Result 223 states and 254 transitions. [2022-07-21 17:25:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:25:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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 55 [2022-07-21 17:25:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:50,193 INFO L225 Difference]: With dead ends: 223 [2022-07-21 17:25:50,193 INFO L226 Difference]: Without dead ends: 223 [2022-07-21 17:25:50,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:25:50,194 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 274 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:50,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 214 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:25:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-21 17:25:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 134. [2022-07-21 17:25:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 113 states have (on average 1.247787610619469) internal successors, (141), 120 states have internal predecessors, (141), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 17:25:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2022-07-21 17:25:50,199 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 55 [2022-07-21 17:25:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:50,200 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2022-07-21 17:25:50,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2022-07-21 17:25:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2022-07-21 17:25:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 17:25:50,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:50,201 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] [2022-07-21 17:25:50,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:50,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:50,403 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash 181256032, now seen corresponding path program 1 times [2022-07-21 17:25:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:50,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340652638] [2022-07-21 17:25:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:50,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:50,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:50,406 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:50,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 17:25:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:25:50,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 17:25:50,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:25:51,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:51,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340652638] [2022-07-21 17:25:51,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340652638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:25:51,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:25:51,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-21 17:25:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233118597] [2022-07-21 17:25:51,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:25:51,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:25:51,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:25:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:25:51,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:25:51,034 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2022-07-21 17:25:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:25:51,151 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2022-07-21 17:25:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:25:51,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 [2022-07-21 17:25:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:25:51,153 INFO L225 Difference]: With dead ends: 137 [2022-07-21 17:25:51,153 INFO L226 Difference]: Without dead ends: 135 [2022-07-21 17:25:51,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:25:51,154 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 81 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:25:51,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 192 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-07-21 17:25:51,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-21 17:25:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-07-21 17:25:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 120 states have internal predecessors, (141), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 17:25:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2022-07-21 17:25:51,159 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 55 [2022-07-21 17:25:51,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:25:51,159 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2022-07-21 17:25:51,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2022-07-21 17:25:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2022-07-21 17:25:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 17:25:51,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:25:51,160 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, 1, 1] [2022-07-21 17:25:51,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:25:51,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:25:51,371 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:25:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:25:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1024677531, now seen corresponding path program 1 times [2022-07-21 17:25:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:25:51,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098530526] [2022-07-21 17:25:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:51,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:25:51,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:25:51,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:25:51,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 17:25:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:51,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:25:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:25:51,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:25:56,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098530526] [2022-07-21 17:25:56,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098530526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:25:56,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1600193524] [2022-07-21 17:25:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:56,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:25:56,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:25:56,048 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:25:56,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-21 17:25:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:25:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:25:56,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:00,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1600193524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:00,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:00,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-21 17:26:00,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181847926] [2022-07-21 17:26:00,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:00,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:26:00,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:00,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:26:00,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-21 17:26:00,931 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:26:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:01,009 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2022-07-21 17:26:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:26:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 58 [2022-07-21 17:26:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:01,011 INFO L225 Difference]: With dead ends: 148 [2022-07-21 17:26:01,011 INFO L226 Difference]: Without dead ends: 138 [2022-07-21 17:26:01,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 200 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-21 17:26:01,012 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:01,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 362 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-07-21 17:26:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-21 17:26:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 124. [2022-07-21 17:26:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 103 states have (on average 1.203883495145631) internal successors, (124), 110 states have internal predecessors, (124), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 17:26:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2022-07-21 17:26:01,017 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 58 [2022-07-21 17:26:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:01,018 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2022-07-21 17:26:01,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:26:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2022-07-21 17:26:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 17:26:01,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:01,019 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:01,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:01,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:01,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:26:01,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:01,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1043028556, now seen corresponding path program 1 times [2022-07-21 17:26:01,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:01,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893590335] [2022-07-21 17:26:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:01,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:01,432 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:01,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 17:26:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:01,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 17:26:01,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:01,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:01,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:01,998 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 [2022-07-21 17:26:02,007 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:02,008 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 [2022-07-21 17:26:02,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:02,166 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 [2022-07-21 17:26:02,175 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:02,176 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 [2022-07-21 17:26:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-21 17:26:02,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:04,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893590335] [2022-07-21 17:26:04,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893590335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:04,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [901952472] [2022-07-21 17:26:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:04,802 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:26:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:26:04,804 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:26:04,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-21 17:26:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:05,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 17:26:05,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:05,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:05,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:05,462 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 [2022-07-21 17:26:05,473 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:05,474 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 [2022-07-21 17:26:05,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:05,570 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 [2022-07-21 17:26:05,579 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:05,579 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 [2022-07-21 17:26:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-21 17:26:05,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:07,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [901952472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:07,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:07,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-21 17:26:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951871906] [2022-07-21 17:26:07,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:07,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:26:07,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:26:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=174, Unknown=1, NotChecked=0, Total=210 [2022-07-21 17:26:07,978 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 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) [2022-07-21 17:26:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:08,733 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-07-21 17:26:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 17:26:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 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) Word has length 60 [2022-07-21 17:26:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:08,735 INFO L225 Difference]: With dead ends: 168 [2022-07-21 17:26:08,735 INFO L226 Difference]: Without dead ends: 168 [2022-07-21 17:26:08,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=58, Invalid=283, Unknown=1, NotChecked=0, Total=342 [2022-07-21 17:26:08,736 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 69 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:08,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 419 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 53 Unchecked, 0.6s Time] [2022-07-21 17:26:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-21 17:26:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 124. [2022-07-21 17:26:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 110 states have internal predecessors, (122), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 17:26:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2022-07-21 17:26:08,743 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 60 [2022-07-21 17:26:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:08,743 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2022-07-21 17:26:08,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 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) [2022-07-21 17:26:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2022-07-21 17:26:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 17:26:08,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:08,744 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:08,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:08,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:26:09,155 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash -929144456, now seen corresponding path program 1 times [2022-07-21 17:26:09,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:09,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688125246] [2022-07-21 17:26:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:09,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:09,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:09,158 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:09,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 17:26:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:09,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:26:09,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:26:09,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:10,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-21 17:26:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:26:10,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:10,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688125246] [2022-07-21 17:26:10,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688125246] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:10,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:10,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-21 17:26:10,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812102031] [2022-07-21 17:26:10,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:10,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:26:10,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:26:10,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:26:10,987 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:13,569 INFO L93 Difference]: Finished difference Result 227 states and 254 transitions. [2022-07-21 17:26:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:26:13,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2022-07-21 17:26:13,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:13,572 INFO L225 Difference]: With dead ends: 227 [2022-07-21 17:26:13,572 INFO L226 Difference]: Without dead ends: 227 [2022-07-21 17:26:13,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-07-21 17:26:13,573 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 380 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:13,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 374 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 246 Invalid, 0 Unknown, 51 Unchecked, 1.1s Time] [2022-07-21 17:26:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-21 17:26:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 128. [2022-07-21 17:26:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 113 states have internal predecessors, (127), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 17:26:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2022-07-21 17:26:13,578 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 62 [2022-07-21 17:26:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:13,578 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2022-07-21 17:26:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2022-07-21 17:26:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:26:13,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:13,579 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:13,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:13,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:13,791 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1261292942, now seen corresponding path program 1 times [2022-07-21 17:26:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:13,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473211255] [2022-07-21 17:26:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:13,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:13,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:13,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:26:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:26:13,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:14,182 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 [2022-07-21 17:26:14,358 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 [2022-07-21 17:26:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-21 17:26:14,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-21 17:26:14,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473211255] [2022-07-21 17:26:14,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473211255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:14,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:14,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-07-21 17:26:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242556001] [2022-07-21 17:26:14,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:14,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:26:14,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:26:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:26:14,702 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:26:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:15,933 INFO L93 Difference]: Finished difference Result 182 states and 202 transitions. [2022-07-21 17:26:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 17:26:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2022-07-21 17:26:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:15,935 INFO L225 Difference]: With dead ends: 182 [2022-07-21 17:26:15,935 INFO L226 Difference]: Without dead ends: 182 [2022-07-21 17:26:15,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 17:26:15,936 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 256 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:15,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 429 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 312 Invalid, 0 Unknown, 37 Unchecked, 0.5s Time] [2022-07-21 17:26:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-21 17:26:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 135. [2022-07-21 17:26:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 113 states have (on average 1.176991150442478) internal successors, (133), 119 states have internal predecessors, (133), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 17:26:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2022-07-21 17:26:15,941 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 63 [2022-07-21 17:26:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:15,941 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2022-07-21 17:26:15,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:26:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2022-07-21 17:26:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:26:15,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:15,942 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:15,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:16,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:16,155 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash 445375639, now seen corresponding path program 1 times [2022-07-21 17:26:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:16,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111871004] [2022-07-21 17:26:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:16,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:16,157 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:16,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:26:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:16,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:26:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:16,972 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 [2022-07-21 17:26:17,409 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 [2022-07-21 17:26:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 17:26:17,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-21 17:26:17,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:17,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111871004] [2022-07-21 17:26:17,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111871004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:17,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:17,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2022-07-21 17:26:17,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580205627] [2022-07-21 17:26:17,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:17,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 17:26:17,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:17,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 17:26:17,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:26:17,993 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:18,296 INFO L93 Difference]: Finished difference Result 197 states and 223 transitions. [2022-07-21 17:26:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:26:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 64 [2022-07-21 17:26:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:18,298 INFO L225 Difference]: With dead ends: 197 [2022-07-21 17:26:18,298 INFO L226 Difference]: Without dead ends: 197 [2022-07-21 17:26:18,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:26:18,299 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 40 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:18,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 446 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-07-21 17:26:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-21 17:26:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 169. [2022-07-21 17:26:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 141 states have (on average 1.198581560283688) internal successors, (169), 149 states have internal predecessors, (169), 10 states have call successors, (10), 6 states have call predecessors, (10), 10 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-21 17:26:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2022-07-21 17:26:18,304 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 64 [2022-07-21 17:26:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:18,304 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2022-07-21 17:26:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2022-07-21 17:26:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:26:18,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:18,305 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:18,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:18,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:18,517 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:18,517 INFO L85 PathProgramCache]: Analyzing trace with hash 36551414, now seen corresponding path program 2 times [2022-07-21 17:26:18,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:18,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157513759] [2022-07-21 17:26:18,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:26:18,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:18,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:18,519 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:18,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 17:26:18,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:26:18,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:26:18,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:26:18,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:26:18,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:26:18,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:18,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157513759] [2022-07-21 17:26:18,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157513759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:26:18,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:26:18,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:26:18,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840190754] [2022-07-21 17:26:18,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:26:18,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:26:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:26:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:26:18,758 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:26:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:18,787 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-07-21 17:26:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:26:18,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-07-21 17:26:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:18,788 INFO L225 Difference]: With dead ends: 128 [2022-07-21 17:26:18,788 INFO L226 Difference]: Without dead ends: 124 [2022-07-21 17:26:18,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:26:18,789 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 23 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:18,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 170 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:26:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-21 17:26:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2022-07-21 17:26:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 102 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-07-21 17:26:18,795 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 64 [2022-07-21 17:26:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:18,795 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-07-21 17:26:18,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:26:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-07-21 17:26:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 17:26:18,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:18,800 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:18,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:19,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:19,011 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash 921743024, now seen corresponding path program 1 times [2022-07-21 17:26:19,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:19,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575070433] [2022-07-21 17:26:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:19,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:19,014 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:19,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 17:26:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:26:19,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:19,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:19,402 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 [2022-07-21 17:26:19,501 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 9 treesize of output 3 [2022-07-21 17:26:19,652 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 17 treesize of output 9 [2022-07-21 17:26:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:26:19,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-21 17:26:20,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:20,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575070433] [2022-07-21 17:26:20,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575070433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:20,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:20,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2022-07-21 17:26:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964724646] [2022-07-21 17:26:20,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:20,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 17:26:20,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:20,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 17:26:20,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:26:20,231 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:26:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:21,750 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2022-07-21 17:26:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:26:21,751 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 65 [2022-07-21 17:26:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:21,752 INFO L225 Difference]: With dead ends: 130 [2022-07-21 17:26:21,752 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 17:26:21,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 17:26:21,753 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:21,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 450 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 518 Invalid, 0 Unknown, 49 Unchecked, 0.8s Time] [2022-07-21 17:26:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 17:26:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 115. [2022-07-21 17:26:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 97 states have (on average 1.134020618556701) internal successors, (110), 103 states have internal predecessors, (110), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2022-07-21 17:26:21,757 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 65 [2022-07-21 17:26:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:21,758 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2022-07-21 17:26:21,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:26:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2022-07-21 17:26:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 17:26:21,759 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:21,759 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:21,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:21,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:21,972 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1490737222, now seen corresponding path program 1 times [2022-07-21 17:26:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:21,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017065554] [2022-07-21 17:26:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:21,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:21,974 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:21,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 17:26:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:26:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:22,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:22,384 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:26:22,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-21 17:26:22,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:26:22,554 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 8 treesize of output 6 [2022-07-21 17:26:28,742 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 16 treesize of output 8 [2022-07-21 17:26:28,788 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 15 treesize of output 17 [2022-07-21 17:26:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 17:26:28,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-21 17:26:29,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:29,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017065554] [2022-07-21 17:26:29,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017065554] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:29,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:29,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2022-07-21 17:26:29,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215791724] [2022-07-21 17:26:29,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:29,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 17:26:29,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:29,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 17:26:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=619, Unknown=2, NotChecked=0, Total=702 [2022-07-21 17:26:29,698 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:31,640 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2022-07-21 17:26:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-21 17:26:31,641 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2022-07-21 17:26:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:31,642 INFO L225 Difference]: With dead ends: 137 [2022-07-21 17:26:31,642 INFO L226 Difference]: Without dead ends: 137 [2022-07-21 17:26:31,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=175, Invalid=1463, Unknown=2, NotChecked=0, Total=1640 [2022-07-21 17:26:31,643 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:31,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 487 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 554 Invalid, 0 Unknown, 107 Unchecked, 1.0s Time] [2022-07-21 17:26:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-21 17:26:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 118. [2022-07-21 17:26:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 106 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2022-07-21 17:26:31,646 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 66 [2022-07-21 17:26:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:31,646 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2022-07-21 17:26:31,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.269230769230769) internal successors, (59), 23 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:26:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2022-07-21 17:26:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 17:26:31,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:31,656 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:31,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:31,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:31,863 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -280378112, now seen corresponding path program 2 times [2022-07-21 17:26:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:31,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109984084] [2022-07-21 17:26:31,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:26:31,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:31,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:31,865 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:31,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 17:26:32,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:26:32,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:26:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:26:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:32,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:32,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:34,487 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 [2022-07-21 17:26:34,497 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:34,498 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 [2022-07-21 17:26:34,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:34,675 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 [2022-07-21 17:26:34,686 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:34,687 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 [2022-07-21 17:26:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:34,878 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 [2022-07-21 17:26:34,894 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:34,894 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 [2022-07-21 17:26:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-21 17:26:34,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:37,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:37,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109984084] [2022-07-21 17:26:37,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109984084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:37,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [130270425] [2022-07-21 17:26:37,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:26:37,684 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:26:37,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:26:37,685 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:26:37,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-21 17:26:38,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:26:38,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:26:38,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:26:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:38,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:38,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:26:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:40,428 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 [2022-07-21 17:26:40,445 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:40,445 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 [2022-07-21 17:26:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:40,650 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 [2022-07-21 17:26:40,666 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:40,666 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 [2022-07-21 17:26:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:26:40,866 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 [2022-07-21 17:26:40,884 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:26:40,884 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 [2022-07-21 17:26:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-21 17:26:40,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:45,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [130270425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:26:45,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:45,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2022-07-21 17:26:45,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943821643] [2022-07-21 17:26:45,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:45,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:26:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:45,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:26:45,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=227, Unknown=2, NotChecked=0, Total=272 [2022-07-21 17:26:45,496 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:26:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:46,299 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-07-21 17:26:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:26:46,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 70 [2022-07-21 17:26:46,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:46,300 INFO L225 Difference]: With dead ends: 174 [2022-07-21 17:26:46,300 INFO L226 Difference]: Without dead ends: 174 [2022-07-21 17:26:46,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=59, Invalid=319, Unknown=2, NotChecked=0, Total=380 [2022-07-21 17:26:46,301 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 91 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:46,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 502 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 430 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-07-21 17:26:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-21 17:26:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2022-07-21 17:26:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 99 states have (on average 1.121212121212121) internal successors, (111), 106 states have internal predecessors, (111), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2022-07-21 17:26:46,305 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 70 [2022-07-21 17:26:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:46,305 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2022-07-21 17:26:46,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:26:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2022-07-21 17:26:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-21 17:26:46,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:46,306 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:46,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:46,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-07-21 17:26:46,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:26:46,719 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash -590692744, now seen corresponding path program 1 times [2022-07-21 17:26:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:46,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795515804] [2022-07-21 17:26:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:46,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:46,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:46,720 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:46,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 17:26:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:26:46,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-21 17:26:46,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-21 17:26:47,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:47,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795515804] [2022-07-21 17:26:47,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795515804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:47,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:47,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 17:26:47,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832691576] [2022-07-21 17:26:47,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:47,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:26:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:26:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:26:47,105 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:26:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:47,274 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-07-21 17:26:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:26:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 69 [2022-07-21 17:26:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:47,275 INFO L225 Difference]: With dead ends: 142 [2022-07-21 17:26:47,275 INFO L226 Difference]: Without dead ends: 142 [2022-07-21 17:26:47,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:26:47,276 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:47,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 219 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:26:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-21 17:26:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2022-07-21 17:26:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 113 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2022-07-21 17:26:47,279 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 69 [2022-07-21 17:26:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:47,280 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2022-07-21 17:26:47,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 17:26:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2022-07-21 17:26:47,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-21 17:26:47,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:47,280 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:47,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:47,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:47,492 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash -513282356, now seen corresponding path program 1 times [2022-07-21 17:26:47,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:47,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433200628] [2022-07-21 17:26:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:47,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:47,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:47,494 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:47,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 17:26:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:47,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:26:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-21 17:26:47,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:47,787 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 17:26:47,787 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 11 [2022-07-21 17:26:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-21 17:26:47,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433200628] [2022-07-21 17:26:47,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433200628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:47,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:47,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-21 17:26:47,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385073770] [2022-07-21 17:26:47,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:47,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:26:47,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:47,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:26:47,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:26:47,844 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-07-21 17:26:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:47,932 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2022-07-21 17:26:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:26:47,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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 73 [2022-07-21 17:26:47,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:47,933 INFO L225 Difference]: With dead ends: 130 [2022-07-21 17:26:47,933 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 17:26:47,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:26:47,934 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:47,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:26:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 17:26:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-21 17:26:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 111 states have (on average 1.1081081081081081) internal successors, (123), 118 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2022-07-21 17:26:47,937 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 73 [2022-07-21 17:26:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:47,937 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2022-07-21 17:26:47,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-07-21 17:26:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2022-07-21 17:26:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 17:26:47,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:47,938 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:47,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-21 17:26:48,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:48,149 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:48,149 INFO L85 PathProgramCache]: Analyzing trace with hash 230335872, now seen corresponding path program 1 times [2022-07-21 17:26:48,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:48,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664526511] [2022-07-21 17:26:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:48,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:48,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:48,151 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:48,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 17:26:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:26:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-21 17:26:48,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:26:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-21 17:26:48,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:26:48,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664526511] [2022-07-21 17:26:48,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664526511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:26:48,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:26:48,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-21 17:26:48,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214111589] [2022-07-21 17:26:48,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:26:48,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:26:48,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:26:48,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:26:48,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:26:48,597 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:26:48,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:26:48,898 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-07-21 17:26:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:26:48,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 76 [2022-07-21 17:26:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:26:48,900 INFO L225 Difference]: With dead ends: 170 [2022-07-21 17:26:48,900 INFO L226 Difference]: Without dead ends: 170 [2022-07-21 17:26:48,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-21 17:26:48,901 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 264 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:26:48,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 241 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:26:48,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-21 17:26:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 135. [2022-07-21 17:26:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 122 states have internal predecessors, (127), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:26:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 140 transitions. [2022-07-21 17:26:48,905 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 140 transitions. Word has length 76 [2022-07-21 17:26:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:26:48,905 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 140 transitions. [2022-07-21 17:26:48,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:26:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 140 transitions. [2022-07-21 17:26:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-21 17:26:48,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:26:48,906 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:26:48,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:26:49,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:26:49,111 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:26:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:26:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash 656898895, now seen corresponding path program 1 times [2022-07-21 17:26:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:26:49,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069113855] [2022-07-21 17:26:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:26:49,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:26:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:26:49,113 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:26:49,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-21 17:26:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:26:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 17:26:49,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:26:49,946 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 [2022-07-21 17:26:50,146 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-21 17:26:50,147 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 39 treesize of output 37 [2022-07-21 17:26:50,316 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 34 treesize of output 22 [2022-07-21 17:26:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-21 17:26:54,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:05,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:27:05,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069113855] [2022-07-21 17:27:05,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069113855] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:27:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1946982447] [2022-07-21 17:27:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:27:05,165 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:27:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:27:05,166 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:27:05,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-21 17:27:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:27:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:27:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:11,235 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 [2022-07-21 17:27:11,577 INFO L356 Elim1Store]: treesize reduction 27, result has 18.2 percent of original size [2022-07-21 17:27:11,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 40 [2022-07-21 17:27:11,836 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 34 treesize of output 22 [2022-07-21 17:27:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-21 17:27:28,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:31,162 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 22 treesize of output 20 [2022-07-21 17:27:36,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1946982447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:27:36,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:36,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-07-21 17:27:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816551545] [2022-07-21 17:27:36,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 17:27:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 17:27:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2153, Unknown=18, NotChecked=0, Total=2352 [2022-07-21 17:27:36,235 INFO L87 Difference]: Start difference. First operand 135 states and 140 transitions. Second operand has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:27:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:27:36,375 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-07-21 17:27:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 17:27:36,375 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 75 [2022-07-21 17:27:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:27:36,376 INFO L225 Difference]: With dead ends: 142 [2022-07-21 17:27:36,376 INFO L226 Difference]: Without dead ends: 122 [2022-07-21 17:27:36,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=192, Invalid=2340, Unknown=18, NotChecked=0, Total=2550 [2022-07-21 17:27:36,378 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:27:36,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 444 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 187 Unchecked, 0.0s Time] [2022-07-21 17:27:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-21 17:27:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-21 17:27:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 110 states have internal predecessors, (114), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 17:27:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-07-21 17:27:36,381 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 75 [2022-07-21 17:27:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:27:36,382 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-07-21 17:27:36,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:27:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-07-21 17:27:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 17:27:36,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:27:36,383 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:27:36,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-07-21 17:27:36,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-07-21 17:27:36,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:27:36,791 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:27:36,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:27:36,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1246142796, now seen corresponding path program 3 times [2022-07-21 17:27:36,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:27:36,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375939150] [2022-07-21 17:27:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:27:36,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:27:36,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:27:36,793 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:27:36,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 17:27:36,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:27:36,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:27:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 17:27:37,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:37,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:27:37,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:27:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:39,432 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 [2022-07-21 17:27:39,442 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:39,442 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 [2022-07-21 17:27:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:39,603 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 [2022-07-21 17:27:39,614 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:39,614 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 [2022-07-21 17:27:39,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:39,778 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 [2022-07-21 17:27:39,789 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:39,789 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 [2022-07-21 17:27:39,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:39,945 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 [2022-07-21 17:27:39,954 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:39,954 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 [2022-07-21 17:27:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-21 17:27:40,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:42,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:27:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375939150] [2022-07-21 17:27:42,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375939150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:27:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1486614139] [2022-07-21 17:27:42,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:27:42,736 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:27:42,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:27:42,737 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:27:42,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-21 17:27:43,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:27:43,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:27:43,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 17:27:43,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:43,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:27:43,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:27:43,528 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:27:43,528 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 18 [2022-07-21 17:27:43,579 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:43,579 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 [2022-07-21 17:27:43,933 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:27:43,933 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 18 [2022-07-21 17:27:43,953 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:43,953 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 [2022-07-21 17:27:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:44,272 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 [2022-07-21 17:27:44,287 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:44,287 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 [2022-07-21 17:27:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:27:44,462 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 [2022-07-21 17:27:44,475 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:27:44,476 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 [2022-07-21 17:27:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-21 17:27:44,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:47,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1486614139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:27:47,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:47,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 21 [2022-07-21 17:27:47,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881377161] [2022-07-21 17:27:47,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:47,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:27:47,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:27:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=480, Unknown=2, NotChecked=0, Total=552 [2022-07-21 17:27:47,205 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 17:27:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:27:50,062 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2022-07-21 17:27:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:27:50,063 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 80 [2022-07-21 17:27:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:27:50,064 INFO L225 Difference]: With dead ends: 176 [2022-07-21 17:27:50,064 INFO L226 Difference]: Without dead ends: 176 [2022-07-21 17:27:50,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=101, Invalid=708, Unknown=3, NotChecked=0, Total=812 [2022-07-21 17:27:50,065 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 75 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:27:50,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 590 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 588 Invalid, 0 Unknown, 54 Unchecked, 0.7s Time] [2022-07-21 17:27:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-21 17:27:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2022-07-21 17:27:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 108 states have (on average 1.0833333333333333) internal successors, (117), 113 states have internal predecessors, (117), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-21 17:27:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2022-07-21 17:27:50,068 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 80 [2022-07-21 17:27:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:27:50,069 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2022-07-21 17:27:50,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-21 17:27:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2022-07-21 17:27:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 17:27:50,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:27:50,070 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:27:50,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-21 17:27:50,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-07-21 17:27:50,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:27:50,480 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:27:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:27:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1176035772, now seen corresponding path program 2 times [2022-07-21 17:27:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:27:50,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600267049] [2022-07-21 17:27:50,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:27:50,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:27:50,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:27:50,482 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:27:50,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-21 17:27:50,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:27:50,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:27:50,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:27:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:27:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-21 17:27:51,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:27:51,441 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 34 treesize of output 30 [2022-07-21 17:27:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-21 17:27:53,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:27:53,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600267049] [2022-07-21 17:27:53,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600267049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:27:53,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:27:53,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-21 17:27:53,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063566830] [2022-07-21 17:27:53,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:27:53,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:27:53,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:27:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:27:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:27:53,808 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:28:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:04,250 INFO L93 Difference]: Finished difference Result 311 states and 324 transitions. [2022-07-21 17:28:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:28:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2022-07-21 17:28:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:04,253 INFO L225 Difference]: With dead ends: 311 [2022-07-21 17:28:04,253 INFO L226 Difference]: Without dead ends: 311 [2022-07-21 17:28:04,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=484, Invalid=1772, Unknown=0, NotChecked=0, Total=2256 [2022-07-21 17:28:04,254 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 741 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:04,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 565 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-21 17:28:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-21 17:28:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 159. [2022-07-21 17:28:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 139 states have (on average 1.158273381294964) internal successors, (161), 144 states have internal predecessors, (161), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 17:28:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 182 transitions. [2022-07-21 17:28:04,259 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 182 transitions. Word has length 79 [2022-07-21 17:28:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:04,259 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 182 transitions. [2022-07-21 17:28:04,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:28:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 182 transitions. [2022-07-21 17:28:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 17:28:04,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:04,260 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:04,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:04,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:04,472 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:28:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:04,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2097370558, now seen corresponding path program 1 times [2022-07-21 17:28:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:04,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069819442] [2022-07-21 17:28:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:04,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:04,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:04,474 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:04,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-21 17:28:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:28:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:04,958 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 [2022-07-21 17:28:05,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:05,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-21 17:28:05,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:05,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-21 17:28:05,383 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 [2022-07-21 17:28:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-21 17:28:05,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-21 17:28:05,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:05,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069819442] [2022-07-21 17:28:05,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069819442] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:28:05,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:05,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2022-07-21 17:28:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27766166] [2022-07-21 17:28:05,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:05,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:28:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:28:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:28:05,837 INFO L87 Difference]: Start difference. First operand 159 states and 182 transitions. Second operand has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:28:08,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:28:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:08,988 INFO L93 Difference]: Finished difference Result 210 states and 229 transitions. [2022-07-21 17:28:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 17:28:08,989 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 80 [2022-07-21 17:28:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:08,991 INFO L225 Difference]: With dead ends: 210 [2022-07-21 17:28:08,991 INFO L226 Difference]: Without dead ends: 210 [2022-07-21 17:28:08,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=341, Invalid=2311, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 17:28:08,992 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 268 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:08,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 596 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 516 Invalid, 0 Unknown, 45 Unchecked, 1.8s Time] [2022-07-21 17:28:08,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-07-21 17:28:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2022-07-21 17:28:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.1666666666666667) internal successors, (175), 156 states have internal predecessors, (175), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 17:28:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2022-07-21 17:28:08,997 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 80 [2022-07-21 17:28:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:08,997 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2022-07-21 17:28:08,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:28:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2022-07-21 17:28:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-21 17:28:08,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:08,998 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:09,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-21 17:28:09,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:09,211 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:28:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash -593977757, now seen corresponding path program 1 times [2022-07-21 17:28:09,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663389] [2022-07-21 17:28:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:09,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:09,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:09,214 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:09,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-21 17:28:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:09,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:28:09,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:09,758 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 [2022-07-21 17:28:10,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:10,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-21 17:28:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:10,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-21 17:28:10,382 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 [2022-07-21 17:28:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-21 17:28:10,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-21 17:28:10,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:10,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663389] [2022-07-21 17:28:10,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:28:10,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:10,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-07-21 17:28:10,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904340403] [2022-07-21 17:28:10,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:10,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 17:28:10,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:10,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 17:28:10,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:28:10,974 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:28:15,118 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:28:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:16,585 INFO L93 Difference]: Finished difference Result 208 states and 227 transitions. [2022-07-21 17:28:16,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 17:28:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 81 [2022-07-21 17:28:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:16,588 INFO L225 Difference]: With dead ends: 208 [2022-07-21 17:28:16,588 INFO L226 Difference]: Without dead ends: 208 [2022-07-21 17:28:16,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=382, Invalid=2698, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 17:28:16,589 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 273 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:16,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 502 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 698 Invalid, 1 Unknown, 76 Unchecked, 3.4s Time] [2022-07-21 17:28:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-21 17:28:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 173. [2022-07-21 17:28:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 157 states have internal predecessors, (175), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 17:28:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 196 transitions. [2022-07-21 17:28:16,595 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 196 transitions. Word has length 81 [2022-07-21 17:28:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:16,595 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 196 transitions. [2022-07-21 17:28:16,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:28:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 196 transitions. [2022-07-21 17:28:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 17:28:16,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:16,596 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:16,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:16,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:16,808 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:28:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:16,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1233441180, now seen corresponding path program 1 times [2022-07-21 17:28:16,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:16,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255062103] [2022-07-21 17:28:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:16,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:16,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:16,810 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:16,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-21 17:28:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:17,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 17:28:17,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:17,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:17,259 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 [2022-07-21 17:28:17,332 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 9 treesize of output 3 [2022-07-21 17:28:17,403 INFO L356 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-07-21 17:28:17,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 43 [2022-07-21 17:28:17,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:17,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-07-21 17:28:17,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 6 [2022-07-21 17:28:17,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:17,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-07-21 17:28:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:17,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:28:17,965 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:28:17,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-07-21 17:28:18,112 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 20 treesize of output 12 [2022-07-21 17:28:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-21 17:28:18,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:18,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:18,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255062103] [2022-07-21 17:28:18,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255062103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:28:18,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [136779891] [2022-07-21 17:28:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:18,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:28:18,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:28:18,937 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:28:18,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-07-21 17:28:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:20,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-21 17:28:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:20,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:20,200 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 [2022-07-21 17:28:20,238 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 9 treesize of output 3 [2022-07-21 17:28:20,315 INFO L356 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-07-21 17:28:20,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 43 [2022-07-21 17:28:20,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:20,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-07-21 17:28:20,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 6 [2022-07-21 17:28:20,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:20,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-07-21 17:28:20,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:20,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:28:20,685 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:28:20,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-07-21 17:28:20,741 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 20 treesize of output 12 [2022-07-21 17:28:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-21 17:28:20,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:20,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [136779891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:28:20,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:20,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-07-21 17:28:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099331823] [2022-07-21 17:28:20,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:20,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 17:28:20,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:20,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 17:28:20,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2022-07-21 17:28:21,000 INFO L87 Difference]: Start difference. First operand 173 states and 196 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 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) [2022-07-21 17:28:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:22,128 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2022-07-21 17:28:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:28:22,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 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 82 [2022-07-21 17:28:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:22,130 INFO L225 Difference]: With dead ends: 173 [2022-07-21 17:28:22,130 INFO L226 Difference]: Without dead ends: 173 [2022-07-21 17:28:22,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 158 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 17:28:22,131 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:22,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 436 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 611 Invalid, 0 Unknown, 93 Unchecked, 0.9s Time] [2022-07-21 17:28:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-21 17:28:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-07-21 17:28:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 151 states have (on average 1.1523178807947019) internal successors, (174), 157 states have internal predecessors, (174), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 17:28:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 195 transitions. [2022-07-21 17:28:22,135 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 195 transitions. Word has length 82 [2022-07-21 17:28:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:22,135 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 195 transitions. [2022-07-21 17:28:22,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 21 states have internal predecessors, (49), 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) [2022-07-21 17:28:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 195 transitions. [2022-07-21 17:28:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-21 17:28:22,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:22,136 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:22,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-07-21 17:28:22,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:22,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:22,548 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:28:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash 418029190, now seen corresponding path program 1 times [2022-07-21 17:28:22,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:22,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820403376] [2022-07-21 17:28:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:22,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:22,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:22,550 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:22,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-21 17:28:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 17:28:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:22,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:23,085 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:23,086 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 [2022-07-21 17:28:23,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 17:28:25,229 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_57|))) is different from true [2022-07-21 17:28:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:25,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-21 17:28:27,321 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_58|))) is different from true [2022-07-21 17:28:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:27,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-21 17:28:27,540 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 16 treesize of output 8 [2022-07-21 17:28:27,593 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 [2022-07-21 17:28:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 145 trivial. 16 not checked. [2022-07-21 17:28:27,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:27,710 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 6 treesize of output 4 [2022-07-21 17:28:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-21 17:28:28,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820403376] [2022-07-21 17:28:28,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820403376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:28:28,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:28,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2022-07-21 17:28:28,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003643607] [2022-07-21 17:28:28,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:28,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 17:28:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 17:28:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=692, Unknown=2, NotChecked=106, Total=870 [2022-07-21 17:28:28,573 INFO L87 Difference]: Start difference. First operand 173 states and 195 transitions. Second operand has 30 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:28:44,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:28:44,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:44,937 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2022-07-21 17:28:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-21 17:28:44,938 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 83 [2022-07-21 17:28:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:44,939 INFO L225 Difference]: With dead ends: 192 [2022-07-21 17:28:44,939 INFO L226 Difference]: Without dead ends: 192 [2022-07-21 17:28:44,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=291, Invalid=2793, Unknown=4, NotChecked=218, Total=3306 [2022-07-21 17:28:44,940 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 123 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:44,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 694 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1053 Invalid, 0 Unknown, 264 Unchecked, 2.5s Time] [2022-07-21 17:28:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-21 17:28:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2022-07-21 17:28:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 153 states have (on average 1.1503267973856208) internal successors, (176), 159 states have internal predecessors, (176), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 17:28:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 197 transitions. [2022-07-21 17:28:44,944 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 197 transitions. Word has length 83 [2022-07-21 17:28:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:44,944 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 197 transitions. [2022-07-21 17:28:44,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 26 states have internal predecessors, (85), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-21 17:28:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 197 transitions. [2022-07-21 17:28:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-21 17:28:44,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:44,945 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:44,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:45,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:45,151 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:28:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1306673498, now seen corresponding path program 2 times [2022-07-21 17:28:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:45,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510389405] [2022-07-21 17:28:45,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:28:45,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:45,153 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:45,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-21 17:28:45,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:28:45,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:45,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:28:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-21 17:28:45,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-21 17:28:45,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:45,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510389405] [2022-07-21 17:28:45,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510389405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:28:45,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:45,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-21 17:28:45,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431230088] [2022-07-21 17:28:45,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:45,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:28:45,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:28:45,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:28:45,671 INFO L87 Difference]: Start difference. First operand 175 states and 197 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:28:45,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:45,978 INFO L93 Difference]: Finished difference Result 182 states and 196 transitions. [2022-07-21 17:28:45,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:28:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 87 [2022-07-21 17:28:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:45,980 INFO L225 Difference]: With dead ends: 182 [2022-07-21 17:28:45,980 INFO L226 Difference]: Without dead ends: 182 [2022-07-21 17:28:45,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-07-21 17:28:45,980 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 89 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:45,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 416 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:28:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-21 17:28:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 167. [2022-07-21 17:28:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 151 states have internal predecessors, (162), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-21 17:28:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 183 transitions. [2022-07-21 17:28:45,985 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 183 transitions. Word has length 87 [2022-07-21 17:28:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:45,985 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 183 transitions. [2022-07-21 17:28:45,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-21 17:28:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 183 transitions. [2022-07-21 17:28:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-21 17:28:45,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:45,986 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:46,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:46,199 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:28:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash -891953512, now seen corresponding path program 1 times [2022-07-21 17:28:46,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:46,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784636369] [2022-07-21 17:28:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:28:46,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:46,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:46,201 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:46,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-21 17:28:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:28:46,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:28:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-21 17:28:46,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-21 17:28:47,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:47,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784636369] [2022-07-21 17:28:47,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784636369] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:28:47,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:28:47,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-21 17:28:47,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653634455] [2022-07-21 17:28:47,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:28:47,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:28:47,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:28:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:28:47,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:28:47,096 INFO L87 Difference]: Start difference. First operand 167 states and 183 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:28:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:28:47,844 INFO L93 Difference]: Finished difference Result 414 states and 445 transitions. [2022-07-21 17:28:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:28:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 89 [2022-07-21 17:28:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:28:47,846 INFO L225 Difference]: With dead ends: 414 [2022-07-21 17:28:47,846 INFO L226 Difference]: Without dead ends: 414 [2022-07-21 17:28:47,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2022-07-21 17:28:47,847 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 826 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:28:47,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 578 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:28:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-21 17:28:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 190. [2022-07-21 17:28:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.1151515151515152) internal successors, (184), 170 states have internal predecessors, (184), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-21 17:28:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 214 transitions. [2022-07-21 17:28:47,852 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 214 transitions. Word has length 89 [2022-07-21 17:28:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:28:47,853 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 214 transitions. [2022-07-21 17:28:47,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 17:28:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 214 transitions. [2022-07-21 17:28:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-21 17:28:47,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:28:47,854 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:28:47,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-07-21 17:28:48,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:28:48,066 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:28:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:28:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash -586455192, now seen corresponding path program 4 times [2022-07-21 17:28:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:28:48,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575165685] [2022-07-21 17:28:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:28:48,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:28:48,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:28:48,068 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:28:48,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-21 17:28:48,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:28:48,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:48,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 17:28:48,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:48,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:48,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:48,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:48,932 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 [2022-07-21 17:28:48,943 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:48,943 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 [2022-07-21 17:28:51,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:51,135 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 [2022-07-21 17:28:51,147 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:51,147 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 [2022-07-21 17:28:51,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:51,346 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 [2022-07-21 17:28:51,359 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:51,359 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 [2022-07-21 17:28:51,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:51,573 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 [2022-07-21 17:28:51,585 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:51,585 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 [2022-07-21 17:28:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:51,807 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 [2022-07-21 17:28:51,818 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:51,819 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 [2022-07-21 17:28:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-21 17:28:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:28:54,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:28:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575165685] [2022-07-21 17:28:54,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575165685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:28:54,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028012629] [2022-07-21 17:28:54,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:28:54,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:28:54,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:28:54,693 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:28:54,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-07-21 17:28:55,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:28:55,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:28:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-21 17:28:55,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:28:55,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:55,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:28:55,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:55,578 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 [2022-07-21 17:28:55,586 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:55,586 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 [2022-07-21 17:28:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:55,702 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 [2022-07-21 17:28:55,711 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:55,712 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 [2022-07-21 17:28:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:55,808 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 [2022-07-21 17:28:55,820 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:55,820 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 [2022-07-21 17:28:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:28:57,951 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 [2022-07-21 17:28:57,959 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:28:57,960 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 [2022-07-21 17:29:00,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:00,067 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 [2022-07-21 17:29:00,078 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:29:00,078 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 [2022-07-21 17:29:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-07-21 17:29:00,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:29:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028012629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:29:02,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:29:02,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2022-07-21 17:29:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597966929] [2022-07-21 17:29:02,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:29:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:29:02,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:29:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=360, Unknown=1, NotChecked=0, Total=420 [2022-07-21 17:29:02,740 INFO L87 Difference]: Start difference. First operand 190 states and 214 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:29:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:03,869 INFO L93 Difference]: Finished difference Result 270 states and 296 transitions. [2022-07-21 17:29:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:29:03,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 90 [2022-07-21 17:29:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:03,871 INFO L225 Difference]: With dead ends: 270 [2022-07-21 17:29:03,871 INFO L226 Difference]: Without dead ends: 270 [2022-07-21 17:29:03,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 156 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=75, Invalid=476, Unknown=1, NotChecked=0, Total=552 [2022-07-21 17:29:03,871 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 102 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:03,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 907 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 764 Invalid, 0 Unknown, 60 Unchecked, 1.0s Time] [2022-07-21 17:29:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-21 17:29:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 190. [2022-07-21 17:29:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.1090909090909091) internal successors, (183), 170 states have internal predecessors, (183), 11 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-21 17:29:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 213 transitions. [2022-07-21 17:29:03,876 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 213 transitions. Word has length 90 [2022-07-21 17:29:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:03,876 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 213 transitions. [2022-07-21 17:29:03,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 18 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:29:03,877 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 213 transitions. [2022-07-21 17:29:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 17:29:03,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:03,878 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:03,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:04,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:04,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:04,294 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:29:04,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1366153752, now seen corresponding path program 2 times [2022-07-21 17:29:04,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:04,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802209392] [2022-07-21 17:29:04,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:29:04,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:04,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:04,296 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:04,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-21 17:29:04,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:29:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:29:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:29:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:04,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:29:05,042 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 [2022-07-21 17:29:05,149 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 9 treesize of output 3 [2022-07-21 17:29:05,260 INFO L356 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2022-07-21 17:29:05,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 37 [2022-07-21 17:29:05,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:05,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-07-21 17:29:05,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 5 [2022-07-21 17:29:06,005 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 28 treesize of output 30 [2022-07-21 17:29:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:06,101 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:29:06,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 32 [2022-07-21 17:29:06,302 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 19 treesize of output 11 [2022-07-21 17:29:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 102 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-21 17:29:06,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:29:07,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:29:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802209392] [2022-07-21 17:29:07,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802209392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:29:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1971798397] [2022-07-21 17:29:07,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:29:07,248 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:29:07,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:29:07,249 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:29:07,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-07-21 17:29:07,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-21 17:29:07,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132627393] [2022-07-21 17:29:07,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:29:07,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:29:07,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:29:07,716 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:29:07,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-21 17:29:07,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 1 [2022-07-21 17:29:08,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:29:08,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:29:08,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:29:08,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:08,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:29:08,719 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 [2022-07-21 17:29:08,897 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 9 treesize of output 3 [2022-07-21 17:29:08,982 INFO L356 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-07-21 17:29:08,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 43 [2022-07-21 17:29:09,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:09,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-07-21 17:29:09,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 5 [2022-07-21 17:29:09,784 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 28 treesize of output 30 [2022-07-21 17:29:09,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:09,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:29:09,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 32 [2022-07-21 17:29:09,843 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 19 treesize of output 11 [2022-07-21 17:29:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-21 17:29:09,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:29:10,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132627393] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:29:10,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:29:10,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2022-07-21 17:29:10,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267413127] [2022-07-21 17:29:10,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:29:10,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 17:29:10,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:29:10,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 17:29:10,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 17:29:10,767 INFO L87 Difference]: Start difference. First operand 190 states and 213 transitions. Second operand has 39 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 33 states have internal predecessors, (83), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 17:29:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:29:12,685 INFO L93 Difference]: Finished difference Result 209 states and 232 transitions. [2022-07-21 17:29:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:29:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 33 states have internal predecessors, (83), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 92 [2022-07-21 17:29:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:29:12,686 INFO L225 Difference]: With dead ends: 209 [2022-07-21 17:29:12,686 INFO L226 Difference]: Without dead ends: 209 [2022-07-21 17:29:12,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 17:29:12,688 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:29:12,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 771 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1070 Invalid, 0 Unknown, 156 Unchecked, 1.3s Time] [2022-07-21 17:29:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-21 17:29:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-07-21 17:29:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 183 states have (on average 1.1038251366120218) internal successors, (202), 187 states have internal predecessors, (202), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (19), 15 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-21 17:29:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2022-07-21 17:29:12,693 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 92 [2022-07-21 17:29:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:29:12,693 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2022-07-21 17:29:12,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 33 states have internal predecessors, (83), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-21 17:29:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2022-07-21 17:29:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 17:29:12,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:29:12,694 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:29:12,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:12,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-21 17:29:13,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:29:13,120 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-07-21 17:29:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:29:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1739385347, now seen corresponding path program 2 times [2022-07-21 17:29:13,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:29:13,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111414271] [2022-07-21 17:29:13,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:29:13,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:29:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:29:13,122 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:29:13,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-07-21 17:29:13,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:29:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:29:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-21 17:29:13,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:29:14,147 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 [2022-07-21 17:29:14,379 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:29:14,379 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 25 treesize of output 17 [2022-07-21 17:29:24,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:24,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 58 [2022-07-21 17:29:25,068 INFO L356 Elim1Store]: treesize reduction 39, result has 13.3 percent of original size [2022-07-21 17:29:25,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 101 [2022-07-21 17:29:33,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:29:33,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:29:33,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 53 [2022-07-21 17:29:34,267 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 54 treesize of output 38