./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/array02-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:55:37,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:55:37,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:55:37,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:55:37,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:55:37,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:55:37,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:55:37,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:55:37,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:55:37,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:55:37,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:55:37,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:55:37,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:55:37,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:55:37,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:55:37,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:55:37,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:55:37,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:55:37,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:55:37,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:55:37,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:55:37,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:55:37,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:55:37,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:55:37,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:55:37,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:55:37,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:55:37,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:55:37,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:55:37,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:55:37,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:55:37,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:55:37,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:55:37,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:55:37,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:55:37,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:55:37,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:55:37,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:55:37,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:55:37,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:55:37,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:55:37,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 13:55:37,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:55:37,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:55:37,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:55:37,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:55:37,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:55:37,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:55:37,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:55:37,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:55:37,509 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:55:37,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:55:37,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:55:37,510 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:55:37,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:55:37,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:55:37,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:55:37,511 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:55:37,511 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:55:37,511 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:55:37,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:55:37,511 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:55:37,511 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:55:37,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:55:37,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:55:37,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:55:37,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:55:37,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:37,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:55:37,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:55:37,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:55:37,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:55:37,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:55:37,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-12-15 13:55:37,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:55:37,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:55:37,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:55:37,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:55:37,746 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:55:37,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-15 13:55:37,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15b5bcb74/04d1d28140394625933a328a7c152761/FLAGc948430dc [2021-12-15 13:55:38,211 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:55:38,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-15 13:55:38,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15b5bcb74/04d1d28140394625933a328a7c152761/FLAGc948430dc [2021-12-15 13:55:38,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15b5bcb74/04d1d28140394625933a328a7c152761 [2021-12-15 13:55:38,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:55:38,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:55:38,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:38,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:55:38,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:55:38,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:38" (1/1) ... [2021-12-15 13:55:38,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab116be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:38, skipping insertion in model container [2021-12-15 13:55:38,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:38" (1/1) ... [2021-12-15 13:55:38,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:55:38,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:55:38,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:38,489 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-15 13:55:38,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3a878067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:38, skipping insertion in model container [2021-12-15 13:55:38,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:38,490 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-15 13:55:38,491 INFO L158 Benchmark]: Toolchain (without parser) took 257.71ms. Allocated memory is still 109.1MB. Free memory was 71.6MB in the beginning and 84.9MB in the end (delta: -13.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 13:55:38,491 INFO L158 Benchmark]: CDTParser took 0.65ms. Allocated memory is still 109.1MB. Free memory is still 89.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 13:55:38,492 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.21ms. Allocated memory is still 109.1MB. Free memory was 71.4MB in the beginning and 84.9MB in the end (delta: -13.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 13:55:38,492 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65ms. Allocated memory is still 109.1MB. Free memory is still 89.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.21ms. Allocated memory is still 109.1MB. Free memory was 71.4MB in the beginning and 84.9MB in the end (delta: -13.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 533]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:55:39,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:55:39,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:55:40,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:55:40,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:55:40,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:55:40,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:55:40,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:55:40,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:55:40,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:55:40,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:55:40,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:55:40,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:55:40,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:55:40,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:55:40,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:55:40,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:55:40,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:55:40,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:55:40,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:55:40,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:55:40,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:55:40,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:55:40,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:55:40,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:55:40,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:55:40,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:55:40,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:55:40,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:55:40,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:55:40,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:55:40,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:55:40,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:55:40,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:55:40,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:55:40,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:55:40,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:55:40,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:55:40,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:55:40,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:55:40,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:55:40,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-15 13:55:40,095 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:55:40,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:55:40,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:55:40,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:55:40,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:55:40,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:55:40,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:55:40,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:55:40,099 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:55:40,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:55:40,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:55:40,101 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:55:40,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:55:40,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:55:40,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:55:40,101 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:55:40,101 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:55:40,101 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:55:40,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:55:40,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:55:40,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 13:55:40,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 13:55:40,102 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:55:40,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:55:40,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:55:40,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:55:40,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:55:40,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:40,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:55:40,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:55:40,111 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 13:55:40,111 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 13:55:40,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:55:40,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 13:55:40,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-12-15 13:55:40,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:55:40,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:55:40,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:55:40,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:55:40,433 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:55:40,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-15 13:55:40,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b504cc449/01732214530b4cb9b04ec502b80606ac/FLAG2bb747815 [2021-12-15 13:55:40,901 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:55:40,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-15 13:55:40,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b504cc449/01732214530b4cb9b04ec502b80606ac/FLAG2bb747815 [2021-12-15 13:55:41,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b504cc449/01732214530b4cb9b04ec502b80606ac [2021-12-15 13:55:41,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:55:41,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:55:41,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:41,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:55:41,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:55:41,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45946974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41, skipping insertion in model container [2021-12-15 13:55:41,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:55:41,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:55:41,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:41,584 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-15 13:55:41,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:55:41,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:41,630 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:55:41,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:55:41,682 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:55:41,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41 WrapperNode [2021-12-15 13:55:41,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:55:41,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:55:41,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:55:41,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:55:41,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,735 INFO L137 Inliner]: procedures = 117, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-12-15 13:55:41,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:55:41,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:55:41,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:55:41,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:55:41,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:55:41,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:55:41,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:55:41,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:55:41,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (1/1) ... [2021-12-15 13:55:41,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:55:41,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:55:41,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 13:55:41,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 13:55:41,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-15 13:55:41,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:55:41,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:55:41,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-15 13:55:41,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:55:41,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:55:41,881 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:55:41,899 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:55:42,178 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:55:42,182 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:55:42,183 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 13:55:42,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:55:42 BoogieIcfgContainer [2021-12-15 13:55:42,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:55:42,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:55:42,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:55:42,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:55:42,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:55:41" (1/3) ... [2021-12-15 13:55:42,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699be09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:55:42, skipping insertion in model container [2021-12-15 13:55:42,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:55:41" (2/3) ... [2021-12-15 13:55:42,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699be09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:55:42, skipping insertion in model container [2021-12-15 13:55:42,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:55:42" (3/3) ... [2021-12-15 13:55:42,190 INFO L111 eAbstractionObserver]: Analyzing ICFG array02-alloca-2.i [2021-12-15 13:55:42,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:55:42,194 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-15 13:55:42,230 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:55:42,238 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 13:55:42,239 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-15 13:55:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:42,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-15 13:55:42,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:42,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559235774] [2021-12-15 13:55:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:42,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:42,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:42,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 13:55:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 13:55:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:42,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:42,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:42,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559235774] [2021-12-15 13:55:42,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559235774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:42,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:42,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:55:42,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45469781] [2021-12-15 13:55:42,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:55:42,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:42,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:55:42,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:42,433 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:42,505 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-12-15 13:55:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:55:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:42,518 INFO L225 Difference]: With dead ends: 41 [2021-12-15 13:55:42,518 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 13:55:42,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:55:42,522 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:42,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 13:55:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-15 13:55:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-15 13:55:42,542 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 6 [2021-12-15 13:55:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:42,542 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-15 13:55:42,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-15 13:55:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:42,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:42,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:42,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 13:55:42,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:42,744 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-15 13:55:42,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:42,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846011336] [2021-12-15 13:55:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:42,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:42,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:42,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:42,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 13:55:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 13:55:42,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:42,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:42,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:42,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:42,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846011336] [2021-12-15 13:55:42,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846011336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:42,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:42,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:42,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020382915] [2021-12-15 13:55:42,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:42,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:42,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:42,885 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:43,099 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-15 13:55:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:43,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:43,101 INFO L225 Difference]: With dead ends: 79 [2021-12-15 13:55:43,101 INFO L226 Difference]: Without dead ends: 79 [2021-12-15 13:55:43,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:55:43,102 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:43,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:55:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-15 13:55:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2021-12-15 13:55:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-15 13:55:43,107 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 6 [2021-12-15 13:55:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:43,108 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-15 13:55:43,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-15 13:55:43,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:55:43,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:43,108 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:55:43,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-15 13:55:43,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:43,315 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:43,315 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-15 13:55:43,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:43,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685527835] [2021-12-15 13:55:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:43,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:43,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:43,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:43,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 13:55:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:43,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 13:55:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:43,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:55:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:43,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:43,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685527835] [2021-12-15 13:55:43,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685527835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:43,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:43,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:43,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544026372] [2021-12-15 13:55:43,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:43,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:43,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:43,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:43,450 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:43,472 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-15 13:55:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 13:55:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:43,475 INFO L225 Difference]: With dead ends: 44 [2021-12-15 13:55:43,475 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 13:55:43,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:55:43,476 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:43,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-15 13:55:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 13:55:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-15 13:55:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-15 13:55:43,480 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-12-15 13:55:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:43,491 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-15 13:55:43,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-15 13:55:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:55:43,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:43,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:43,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:43,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:43,700 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-12-15 13:55:43,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:43,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823095458] [2021-12-15 13:55:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:43,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:43,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:43,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:43,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-15 13:55:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:43,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 13:55:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:43,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:43,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:43,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:43,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823095458] [2021-12-15 13:55:43,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823095458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:43,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:43,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:55:43,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741766209] [2021-12-15 13:55:43,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:43,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:43,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:43,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:43,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:43,772 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:43,881 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-15 13:55:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:43,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:55:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:43,882 INFO L225 Difference]: With dead ends: 37 [2021-12-15 13:55:43,882 INFO L226 Difference]: Without dead ends: 37 [2021-12-15 13:55:43,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:55:43,883 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:43,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-15 13:55:43,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-15 13:55:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-15 13:55:43,885 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2021-12-15 13:55:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:43,886 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-15 13:55:43,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-15 13:55:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:55:43,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:43,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:43,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:44,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:44,093 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-12-15 13:55:44,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:44,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040852195] [2021-12-15 13:55:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:44,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:44,095 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:44,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-15 13:55:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 13:55:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:44,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:55:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:44,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:44,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040852195] [2021-12-15 13:55:44,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040852195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:44,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:44,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246940729] [2021-12-15 13:55:44,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:55:44,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:44,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:55:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:55:44,238 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,256 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-12-15 13:55:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:55:44,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:55:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,257 INFO L225 Difference]: With dead ends: 40 [2021-12-15 13:55:44,257 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 13:55:44,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:55:44,258 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2021-12-15 13:55:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 13:55:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-15 13:55:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.4375) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-15 13:55:44,261 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 8 [2021-12-15 13:55:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,261 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-15 13:55:44,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-15 13:55:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 13:55:44,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:44,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:44,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052306, now seen corresponding path program 1 times [2021-12-15 13:55:44,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:44,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486356804] [2021-12-15 13:55:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:44,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:44,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:44,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-15 13:55:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 13:55:44,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:44,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486356804] [2021-12-15 13:55:44,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486356804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:44,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:44,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:44,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744485274] [2021-12-15 13:55:44,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:44,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:44,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:44,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:44,569 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:44,601 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-15 13:55:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-15 13:55:44,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:44,603 INFO L225 Difference]: With dead ends: 39 [2021-12-15 13:55:44,603 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 13:55:44,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:44,604 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:44,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 13:55:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-15 13:55:44,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-15 13:55:44,607 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 9 [2021-12-15 13:55:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:44,607 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-15 13:55:44,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-15 13:55:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:55:44,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:44,608 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:44,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-15 13:55:44,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:44,814 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-15 13:55:44,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:44,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338108987] [2021-12-15 13:55:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:44,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:44,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:44,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-15 13:55:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:44,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 13:55:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:44,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:44,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338108987] [2021-12-15 13:55:44,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338108987] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:44,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:55:44,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-15 13:55:44,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353409597] [2021-12-15 13:55:44,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:44,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:55:44,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:44,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:55:44,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:55:44,984 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:45,035 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-15 13:55:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:55:45,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 13:55:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:45,038 INFO L225 Difference]: With dead ends: 65 [2021-12-15 13:55:45,038 INFO L226 Difference]: Without dead ends: 65 [2021-12-15 13:55:45,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:55:45,039 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:45,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:55:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-15 13:55:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-12-15 13:55:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-15 13:55:45,041 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 10 [2021-12-15 13:55:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:45,042 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-15 13:55:45,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-15 13:55:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:55:45,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:45,042 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:45,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-15 13:55:45,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:45,249 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-15 13:55:45,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832230035] [2021-12-15 13:55:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:45,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:45,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:45,252 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:45,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-15 13:55:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:45,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 13:55:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:45,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:55:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:45,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:45,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:45,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832230035] [2021-12-15 13:55:45,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832230035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:45,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:55:45,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-15 13:55:45,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446315936] [2021-12-15 13:55:45,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:45,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:55:45,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:45,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:55:45,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:55:45,808 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:46,225 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-12-15 13:55:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:55:46,240 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 13:55:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:46,241 INFO L225 Difference]: With dead ends: 73 [2021-12-15 13:55:46,241 INFO L226 Difference]: Without dead ends: 73 [2021-12-15 13:55:46,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:55:46,242 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 152 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:46,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 88 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2021-12-15 13:55:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-15 13:55:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-12-15 13:55:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-15 13:55:46,245 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 10 [2021-12-15 13:55:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:46,245 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-15 13:55:46,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-15 13:55:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:55:46,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:46,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:46,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:46,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:46,453 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:46,453 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2021-12-15 13:55:46,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:46,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63347241] [2021-12-15 13:55:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:46,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:46,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:46,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-15 13:55:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 13:55:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:55:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:46,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:46,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:46,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63347241] [2021-12-15 13:55:46,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63347241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:46,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:46,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:46,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486269906] [2021-12-15 13:55:46,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:46,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:55:46,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:55:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:55:46,587 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:46,796 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-12-15 13:55:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 13:55:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:46,799 INFO L225 Difference]: With dead ends: 90 [2021-12-15 13:55:46,799 INFO L226 Difference]: Without dead ends: 90 [2021-12-15 13:55:46,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:55:46,800 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:46,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:55:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-15 13:55:46,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-12-15 13:55:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.309090909090909) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-12-15 13:55:46,803 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 12 [2021-12-15 13:55:46,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:46,803 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-12-15 13:55:46,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-12-15 13:55:46,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:55:46,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:46,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:46,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:47,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:47,011 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2021-12-15 13:55:47,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:47,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196836602] [2021-12-15 13:55:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:47,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:47,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:47,013 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:47,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-15 13:55:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:47,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 13:55:47,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:47,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:55:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:47,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:47,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:47,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196836602] [2021-12-15 13:55:47,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196836602] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 13:55:47,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 13:55:47,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-15 13:55:47,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082471649] [2021-12-15 13:55:47,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:47,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:55:47,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:47,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:55:47,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:55:47,460 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:47,696 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-15 13:55:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 13:55:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:47,698 INFO L225 Difference]: With dead ends: 63 [2021-12-15 13:55:47,698 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 13:55:47,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:55:47,699 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:47,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 35 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:55:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 13:55:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-12-15 13:55:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-15 13:55:47,702 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2021-12-15 13:55:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:47,702 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-15 13:55:47,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-15 13:55:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:55:47,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:47,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:47,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:47,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:47,907 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:47,908 INFO L85 PathProgramCache]: Analyzing trace with hash 363893421, now seen corresponding path program 1 times [2021-12-15 13:55:47,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:47,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630122291] [2021-12-15 13:55:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:47,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:47,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:47,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:47,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-15 13:55:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:47,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 13:55:47,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:47,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:47,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:47,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630122291] [2021-12-15 13:55:47,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630122291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:47,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:47,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:47,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617921137] [2021-12-15 13:55:47,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:47,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:55:47,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:55:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:55:47,974 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:48,077 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-12-15 13:55:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:55:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 13:55:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:48,078 INFO L225 Difference]: With dead ends: 80 [2021-12-15 13:55:48,078 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 13:55:48,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:55:48,078 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:48,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 13:55:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-12-15 13:55:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-15 13:55:48,081 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2021-12-15 13:55:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:48,081 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-15 13:55:48,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-15 13:55:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:55:48,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:48,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:48,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:48,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:48,282 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1064957999, now seen corresponding path program 1 times [2021-12-15 13:55:48,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:48,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045602690] [2021-12-15 13:55:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:48,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:48,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:48,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:48,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-15 13:55:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 13:55:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:48,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:48,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:48,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045602690] [2021-12-15 13:55:48,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045602690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:48,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:55:48,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-15 13:55:48,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229907115] [2021-12-15 13:55:48,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:48,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 13:55:48,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:48,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 13:55:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:55:48,490 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:48,729 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-12-15 13:55:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 13:55:48,730 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 13:55:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:48,730 INFO L225 Difference]: With dead ends: 82 [2021-12-15 13:55:48,731 INFO L226 Difference]: Without dead ends: 82 [2021-12-15 13:55:48,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-15 13:55:48,731 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:48,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 95 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:55:48,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-15 13:55:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2021-12-15 13:55:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-15 13:55:48,733 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 13 [2021-12-15 13:55:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:48,733 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-15 13:55:48,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:48,733 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-15 13:55:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 13:55:48,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:48,734 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:48,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:48,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:48,934 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2110205631, now seen corresponding path program 1 times [2021-12-15 13:55:48,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:48,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536762039] [2021-12-15 13:55:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:48,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:48,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:48,936 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:48,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-15 13:55:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 13:55:48,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:49,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:49,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:49,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536762039] [2021-12-15 13:55:49,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536762039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:49,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:55:49,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-15 13:55:49,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23601854] [2021-12-15 13:55:49,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:49,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:55:49,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:55:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:55:49,106 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:49,188 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-12-15 13:55:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:55:49,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 13:55:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:49,189 INFO L225 Difference]: With dead ends: 65 [2021-12-15 13:55:49,189 INFO L226 Difference]: Without dead ends: 65 [2021-12-15 13:55:49,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:55:49,190 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:49,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:55:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-15 13:55:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-12-15 13:55:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-12-15 13:55:49,192 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 18 [2021-12-15 13:55:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:49,192 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-12-15 13:55:49,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-12-15 13:55:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 13:55:49,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:49,193 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-15 13:55:49,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:49,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:49,402 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:49,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-15 13:55:49,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:49,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888651507] [2021-12-15 13:55:49,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:55:49,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:49,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:49,404 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:49,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-15 13:55:49,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:55:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:55:49,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 13:55:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:49,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:55:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:49,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:55:50,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:50,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888651507] [2021-12-15 13:55:50,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888651507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:50,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:55:50,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-15 13:55:50,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601804979] [2021-12-15 13:55:50,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:50,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 13:55:50,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 13:55:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:55:50,479 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:52,365 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2021-12-15 13:55:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 13:55:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 13:55:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:52,367 INFO L225 Difference]: With dead ends: 183 [2021-12-15 13:55:52,367 INFO L226 Difference]: Without dead ends: 183 [2021-12-15 13:55:52,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-12-15 13:55:52,367 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 395 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:52,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 338 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 271 Invalid, 0 Unknown, 48 Unchecked, 1.0s Time] [2021-12-15 13:55:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-15 13:55:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 78. [2021-12-15 13:55:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.2) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:52,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-12-15 13:55:52,370 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 18 [2021-12-15 13:55:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-12-15 13:55:52,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-12-15 13:55:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 13:55:52,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:52,371 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:52,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-15 13:55:52,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:52,571 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1163693311, now seen corresponding path program 1 times [2021-12-15 13:55:52,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:52,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253753047] [2021-12-15 13:55:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:52,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:52,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:52,575 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:52,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-15 13:55:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:52,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 13:55:52,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:52,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:55:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:52,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:55:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:55:53,338 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:53,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253753047] [2021-12-15 13:55:53,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253753047] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:55:53,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:55:53,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-15 13:55:53,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413953233] [2021-12-15 13:55:53,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:55:53,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 13:55:53,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 13:55:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:55:53,339 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:53,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:53,900 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2021-12-15 13:55:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 13:55:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-15 13:55:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:53,903 INFO L225 Difference]: With dead ends: 114 [2021-12-15 13:55:53,903 INFO L226 Difference]: Without dead ends: 114 [2021-12-15 13:55:53,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-15 13:55:53,903 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:53,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 114 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2021-12-15 13:55:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-15 13:55:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2021-12-15 13:55:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 103 states have (on average 1.203883495145631) internal successors, (124), 105 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-12-15 13:55:53,911 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 18 [2021-12-15 13:55:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:53,911 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-12-15 13:55:53,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-12-15 13:55:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 13:55:53,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:53,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:53,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:54,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:54,119 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash -991865623, now seen corresponding path program 1 times [2021-12-15 13:55:54,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:54,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352693773] [2021-12-15 13:55:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:54,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:54,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:54,120 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) [2021-12-15 13:55:54,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-15 13:55:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 13:55:54,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:55:56,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:56,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:56,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352693773] [2021-12-15 13:55:56,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352693773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:56,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:56,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:56,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454047927] [2021-12-15 13:55:56,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:56,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:55:56,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:56,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:55:56,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-15 13:55:56,301 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:56,321 INFO L93 Difference]: Finished difference Result 142 states and 170 transitions. [2021-12-15 13:55:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 13:55:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:56,322 INFO L225 Difference]: With dead ends: 142 [2021-12-15 13:55:56,322 INFO L226 Difference]: Without dead ends: 138 [2021-12-15 13:55:56,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-15 13:55:56,323 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:56,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 75 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-15 13:55:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-15 13:55:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2021-12-15 13:55:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 128 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-12-15 13:55:56,325 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 19 [2021-12-15 13:55:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:56,325 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-12-15 13:55:56,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-12-15 13:55:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 13:55:56,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:56,326 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:56,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-15 13:55:56,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:56,533 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:56,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1147657014, now seen corresponding path program 1 times [2021-12-15 13:55:56,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:56,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126131705] [2021-12-15 13:55:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:56,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:56,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:56,535 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:56,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-15 13:55:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:56,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 13:55:56,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:55:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 13:55:58,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:55:58,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:55:58,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126131705] [2021-12-15 13:55:58,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126131705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:55:58,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:55:58,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:55:58,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171888720] [2021-12-15 13:55:58,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:55:58,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:55:58,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:55:58,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:55:58,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-15 13:55:58,768 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:55:58,783 INFO L93 Difference]: Finished difference Result 173 states and 207 transitions. [2021-12-15 13:55:58,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:55:58,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 13:55:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:55:58,784 INFO L225 Difference]: With dead ends: 173 [2021-12-15 13:55:58,784 INFO L226 Difference]: Without dead ends: 161 [2021-12-15 13:55:58,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-15 13:55:58,785 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:55:58,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-15 13:55:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-15 13:55:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2021-12-15 13:55:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 138 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2021-12-15 13:55:58,787 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 25 [2021-12-15 13:55:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:55:58,787 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2021-12-15 13:55:58,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:55:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2021-12-15 13:55:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 13:55:58,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:55:58,788 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:55:58,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-15 13:55:58,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:55:58,989 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:55:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:55:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash 989408118, now seen corresponding path program 1 times [2021-12-15 13:55:58,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:55:58,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443827167] [2021-12-15 13:55:58,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:55:58,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:55:58,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:55:58,991 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:55:58,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-15 13:55:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:55:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 13:55:59,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 13:56:01,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:56:01,206 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443827167] [2021-12-15 13:56:01,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443827167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:56:01,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:56:01,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:56:01,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048544102] [2021-12-15 13:56:01,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:56:01,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:56:01,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:56:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-15 13:56:01,207 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:01,223 INFO L93 Difference]: Finished difference Result 195 states and 234 transitions. [2021-12-15 13:56:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:56:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 13:56:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:01,224 INFO L225 Difference]: With dead ends: 195 [2021-12-15 13:56:01,224 INFO L226 Difference]: Without dead ends: 191 [2021-12-15 13:56:01,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-15 13:56:01,225 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:01,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-15 13:56:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-15 13:56:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2021-12-15 13:56:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 180 states have (on average 1.2222222222222223) internal successors, (220), 182 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-12-15 13:56:01,229 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 25 [2021-12-15 13:56:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:01,229 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-12-15 13:56:01,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-12-15 13:56:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 13:56:01,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:01,230 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:01,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:01,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:01,437 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:01,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:01,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2063932537, now seen corresponding path program 2 times [2021-12-15 13:56:01,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:01,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519326444] [2021-12-15 13:56:01,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:56:01,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:01,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:01,440 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:01,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-15 13:56:01,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:56:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 13:56:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:01,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:56:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 13:56:01,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:03,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:03,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519326444] [2021-12-15 13:56:03,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519326444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:03,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:56:03,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-15 13:56:03,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647428952] [2021-12-15 13:56:03,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:03,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 13:56:03,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 13:56:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-15 13:56:03,105 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:03,600 INFO L93 Difference]: Finished difference Result 203 states and 241 transitions. [2021-12-15 13:56:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:56:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-15 13:56:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:03,601 INFO L225 Difference]: With dead ends: 203 [2021-12-15 13:56:03,601 INFO L226 Difference]: Without dead ends: 200 [2021-12-15 13:56:03,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-12-15 13:56:03,602 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:03,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 167 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2021-12-15 13:56:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-15 13:56:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2021-12-15 13:56:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 186 states have (on average 1.2204301075268817) internal successors, (227), 188 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 227 transitions. [2021-12-15 13:56:03,605 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 227 transitions. Word has length 30 [2021-12-15 13:56:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:03,606 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 227 transitions. [2021-12-15 13:56:03,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 227 transitions. [2021-12-15 13:56:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 13:56:03,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:03,607 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:03,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:03,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:03,812 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash 630576131, now seen corresponding path program 1 times [2021-12-15 13:56:03,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216330806] [2021-12-15 13:56:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:03,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:03,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:03,813 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:03,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-15 13:56:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:03,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 13:56:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:04,076 INFO L354 Elim1Store]: treesize reduction 442, result has 12.5 percent of original size [2021-12-15 13:56:04,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 260 treesize of output 93 [2021-12-15 13:56:04,364 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-12-15 13:56:04,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 68 [2021-12-15 13:56:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 13:56:04,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:56:04,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:04,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216330806] [2021-12-15 13:56:04,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216330806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:56:04,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:56:04,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-15 13:56:04,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5191332] [2021-12-15 13:56:04,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:56:04,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:56:04,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:56:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:56:04,441 INFO L87 Difference]: Start difference. First operand 189 states and 227 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:04,561 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2021-12-15 13:56:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:56:04,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 13:56:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:04,563 INFO L225 Difference]: With dead ends: 187 [2021-12-15 13:56:04,563 INFO L226 Difference]: Without dead ends: 169 [2021-12-15 13:56:04,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:56:04,564 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:04,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 101 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-12-15 13:56:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-15 13:56:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-15 13:56:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 1.2289156626506024) internal successors, (204), 168 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2021-12-15 13:56:04,568 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 31 [2021-12-15 13:56:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:04,568 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2021-12-15 13:56:04,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2021-12-15 13:56:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 13:56:04,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:04,569 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-15 13:56:04,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:04,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:04,775 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:04,776 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-15 13:56:04,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:04,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954417728] [2021-12-15 13:56:04,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:56:04,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:04,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:04,778 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:04,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-15 13:56:04,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-15 13:56:04,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:04,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 13:56:04,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:04,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:56:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:05,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:07,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:07,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954417728] [2021-12-15 13:56:07,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954417728] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:07,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:56:07,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-15 13:56:07,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792321749] [2021-12-15 13:56:07,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:07,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 13:56:07,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:07,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 13:56:07,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-12-15 13:56:07,090 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:15,450 INFO L93 Difference]: Finished difference Result 1844 states and 2231 transitions. [2021-12-15 13:56:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-15 13:56:15,451 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 13:56:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:15,455 INFO L225 Difference]: With dead ends: 1844 [2021-12-15 13:56:15,455 INFO L226 Difference]: Without dead ends: 1844 [2021-12-15 13:56:15,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 13:56:15,456 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1633 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:15,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 1101 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 883 Invalid, 0 Unknown, 101 Unchecked, 2.9s Time] [2021-12-15 13:56:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-15 13:56:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 201. [2021-12-15 13:56:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 198 states have (on average 1.2323232323232323) internal successors, (244), 200 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 244 transitions. [2021-12-15 13:56:15,464 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 244 transitions. Word has length 34 [2021-12-15 13:56:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 244 transitions. [2021-12-15 13:56:15,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 244 transitions. [2021-12-15 13:56:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 13:56:15,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:15,465 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:15,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:15,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:15,672 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash 913185738, now seen corresponding path program 3 times [2021-12-15 13:56:15,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:15,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916885260] [2021-12-15 13:56:15,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:56:15,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:15,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:15,674 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:15,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-15 13:56:15,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 13:56:15,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:15,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 13:56:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:15,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:56:16,288 INFO L388 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 16 [2021-12-15 13:56:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:16,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:17,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:17,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916885260] [2021-12-15 13:56:17,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916885260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:17,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:56:17,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-12-15 13:56:17,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249243995] [2021-12-15 13:56:17,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:17,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 13:56:17,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:17,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 13:56:17,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-12-15 13:56:17,866 INFO L87 Difference]: Start difference. First operand 201 states and 244 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:21,505 INFO L93 Difference]: Finished difference Result 391 states and 463 transitions. [2021-12-15 13:56:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 13:56:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 13:56:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:21,508 INFO L225 Difference]: With dead ends: 391 [2021-12-15 13:56:21,508 INFO L226 Difference]: Without dead ends: 367 [2021-12-15 13:56:21,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-12-15 13:56:21,509 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 196 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:21,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 470 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 331 Invalid, 0 Unknown, 145 Unchecked, 2.5s Time] [2021-12-15 13:56:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-15 13:56:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 253. [2021-12-15 13:56:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 250 states have (on average 1.212) internal successors, (303), 252 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2021-12-15 13:56:21,513 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 34 [2021-12-15 13:56:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:21,513 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2021-12-15 13:56:21,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2021-12-15 13:56:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 13:56:21,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:21,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-15 13:56:21,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:21,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:21,720 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1523871233, now seen corresponding path program 1 times [2021-12-15 13:56:21,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:21,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613869727] [2021-12-15 13:56:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:21,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:21,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:21,722 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:21,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-15 13:56:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 13:56:21,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 13:56:21,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 13:56:22,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:22,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613869727] [2021-12-15 13:56:22,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613869727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:22,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:56:22,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-15 13:56:22,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805576984] [2021-12-15 13:56:22,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:22,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 13:56:22,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 13:56:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:56:22,126 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:22,361 INFO L93 Difference]: Finished difference Result 231 states and 277 transitions. [2021-12-15 13:56:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:56:22,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 13:56:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:22,363 INFO L225 Difference]: With dead ends: 231 [2021-12-15 13:56:22,363 INFO L226 Difference]: Without dead ends: 207 [2021-12-15 13:56:22,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-15 13:56:22,363 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:22,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 160 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:56:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-15 13:56:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-12-15 13:56:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 204 states have (on average 1.2303921568627452) internal successors, (251), 206 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 251 transitions. [2021-12-15 13:56:22,367 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 251 transitions. Word has length 37 [2021-12-15 13:56:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:22,367 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 251 transitions. [2021-12-15 13:56:22,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 251 transitions. [2021-12-15 13:56:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 13:56:22,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:22,367 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:22,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:22,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:22,574 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:22,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash 255163021, now seen corresponding path program 4 times [2021-12-15 13:56:22,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:22,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225635652] [2021-12-15 13:56:22,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:56:22,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:22,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:22,575 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:22,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-15 13:56:22,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:56:22,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 13:56:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:22,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:56:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:56:23,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 13:56:25,222 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225635652] [2021-12-15 13:56:25,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225635652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:25,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:56:25,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-15 13:56:25,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999068469] [2021-12-15 13:56:25,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:25,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 13:56:25,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:25,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 13:56:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-15 13:56:25,224 INFO L87 Difference]: Start difference. First operand 207 states and 251 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:28,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 13:56:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:29,490 INFO L93 Difference]: Finished difference Result 419 states and 503 transitions. [2021-12-15 13:56:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 13:56:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 13:56:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:29,492 INFO L225 Difference]: With dead ends: 419 [2021-12-15 13:56:29,492 INFO L226 Difference]: Without dead ends: 419 [2021-12-15 13:56:29,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 13:56:29,493 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 417 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:29,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 291 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 262 Invalid, 0 Unknown, 42 Unchecked, 2.4s Time] [2021-12-15 13:56:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-15 13:56:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 399. [2021-12-15 13:56:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 396 states have (on average 1.22979797979798) internal successors, (487), 398 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 487 transitions. [2021-12-15 13:56:29,498 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 487 transitions. Word has length 38 [2021-12-15 13:56:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:29,498 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 487 transitions. [2021-12-15 13:56:29,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:29,498 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 487 transitions. [2021-12-15 13:56:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 13:56:29,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:29,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-15 13:56:29,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:29,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:29,707 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 599848030, now seen corresponding path program 2 times [2021-12-15 13:56:29,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:29,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178032555] [2021-12-15 13:56:29,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:56:29,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:29,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:29,709 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:29,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-15 13:56:29,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 13:56:29,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 13:56:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-15 13:56:31,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:56:31,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:31,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178032555] [2021-12-15 13:56:31,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178032555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:56:31,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:56:31,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:56:31,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376262568] [2021-12-15 13:56:31,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:56:31,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:56:31,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:56:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-15 13:56:31,921 INFO L87 Difference]: Start difference. First operand 399 states and 487 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:31,925 INFO L93 Difference]: Finished difference Result 398 states and 486 transitions. [2021-12-15 13:56:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:56:31,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 13:56:31,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:31,927 INFO L225 Difference]: With dead ends: 398 [2021-12-15 13:56:31,927 INFO L226 Difference]: Without dead ends: 396 [2021-12-15 13:56:31,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-15 13:56:31,928 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:31,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-15 13:56:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-15 13:56:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 209. [2021-12-15 13:56:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 208 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 247 transitions. [2021-12-15 13:56:31,932 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 247 transitions. Word has length 41 [2021-12-15 13:56:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:31,932 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 247 transitions. [2021-12-15 13:56:31,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 247 transitions. [2021-12-15 13:56:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 13:56:31,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:31,933 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:31,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:32,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:32,139 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash -850374243, now seen corresponding path program 5 times [2021-12-15 13:56:32,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:32,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117839398] [2021-12-15 13:56:32,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:56:32,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:32,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:32,143 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:32,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-15 13:56:32,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-15 13:56:32,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 13:56:32,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:32,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:56:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 80 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 13:56:32,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:56:36,447 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:36,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117839398] [2021-12-15 13:56:36,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117839398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:36,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:56:36,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 28 [2021-12-15 13:56:36,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558862631] [2021-12-15 13:56:36,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:36,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 13:56:36,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 13:56:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-12-15 13:56:36,449 INFO L87 Difference]: Start difference. First operand 209 states and 247 transitions. Second operand has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:38,091 INFO L93 Difference]: Finished difference Result 243 states and 286 transitions. [2021-12-15 13:56:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 13:56:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-15 13:56:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:38,094 INFO L225 Difference]: With dead ends: 243 [2021-12-15 13:56:38,094 INFO L226 Difference]: Without dead ends: 240 [2021-12-15 13:56:38,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 13:56:38,095 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:38,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 415 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 346 Invalid, 0 Unknown, 95 Unchecked, 1.1s Time] [2021-12-15 13:56:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-15 13:56:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2021-12-15 13:56:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.2) internal successors, (270), 226 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2021-12-15 13:56:38,098 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 62 [2021-12-15 13:56:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:38,098 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2021-12-15 13:56:38,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2021-12-15 13:56:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 13:56:38,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:38,099 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:38,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:38,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:38,299 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:38,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2047810797, now seen corresponding path program 1 times [2021-12-15 13:56:38,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:38,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205411921] [2021-12-15 13:56:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:38,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:38,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:38,301 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:38,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-15 13:56:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 13:56:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:38,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:56:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 87 proven. 41 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 13:56:39,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:56:42,303 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205411921] [2021-12-15 13:56:42,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205411921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:42,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:56:42,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-12-15 13:56:42,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841622116] [2021-12-15 13:56:42,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:42,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 13:56:42,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:42,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 13:56:42,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-12-15 13:56:42,304 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:43,533 INFO L93 Difference]: Finished difference Result 350 states and 416 transitions. [2021-12-15 13:56:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 13:56:43,534 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 13:56:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:43,535 INFO L225 Difference]: With dead ends: 350 [2021-12-15 13:56:43,535 INFO L226 Difference]: Without dead ends: 349 [2021-12-15 13:56:43,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-12-15 13:56:43,535 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 62 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:43,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 552 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 30 Unchecked, 0.8s Time] [2021-12-15 13:56:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-15 13:56:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 273. [2021-12-15 13:56:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 271 states have (on average 1.2103321033210332) internal successors, (328), 272 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 328 transitions. [2021-12-15 13:56:43,539 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 328 transitions. Word has length 64 [2021-12-15 13:56:43,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:43,539 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 328 transitions. [2021-12-15 13:56:43,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 328 transitions. [2021-12-15 13:56:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 13:56:43,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:43,540 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:43,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:43,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:43,751 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1712671571, now seen corresponding path program 1 times [2021-12-15 13:56:43,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:43,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511203746] [2021-12-15 13:56:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:56:43,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:43,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:43,754 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) [2021-12-15 13:56:43,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-15 13:56:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:56:43,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 13:56:43,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:43,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:56:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 13:56:44,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:56:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:56:47,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:56:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511203746] [2021-12-15 13:56:47,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511203746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:56:47,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:56:47,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-12-15 13:56:47,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489544461] [2021-12-15 13:56:47,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:56:47,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 13:56:47,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:56:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 13:56:47,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-12-15 13:56:47,855 INFO L87 Difference]: Start difference. First operand 273 states and 328 transitions. Second operand has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:56:49,395 INFO L93 Difference]: Finished difference Result 446 states and 533 transitions. [2021-12-15 13:56:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 13:56:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 13:56:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:56:49,397 INFO L225 Difference]: With dead ends: 446 [2021-12-15 13:56:49,397 INFO L226 Difference]: Without dead ends: 445 [2021-12-15 13:56:49,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-12-15 13:56:49,398 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 13:56:49,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 510 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 211 Invalid, 0 Unknown, 39 Unchecked, 0.9s Time] [2021-12-15 13:56:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-15 13:56:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 328. [2021-12-15 13:56:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 326 states have (on average 1.2116564417177915) internal successors, (395), 327 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 395 transitions. [2021-12-15 13:56:49,404 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 395 transitions. Word has length 64 [2021-12-15 13:56:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:56:49,404 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 395 transitions. [2021-12-15 13:56:49,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:56:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 395 transitions. [2021-12-15 13:56:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 13:56:49,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:56:49,405 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:56:49,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-15 13:56:49,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:56:49,612 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:56:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:56:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -186698323, now seen corresponding path program 2 times [2021-12-15 13:56:49,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:56:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94848756] [2021-12-15 13:56:49,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:56:49,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:56:49,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:56:49,613 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:56:49,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-15 13:56:49,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:56:49,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:56:49,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 13:56:49,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:56:49,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-15 13:56:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 87 proven. 41 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 13:56:50,296 INFO L328 TraceCheckSpWp]: Computing backward predicates...