./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety-realloc/array-realloc-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-realloc/array-realloc-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 a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:59:08,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:59:08,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:59:08,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:59:08,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:59:08,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:59:08,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:59:08,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:59:08,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:59:08,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:59:08,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:59:08,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:59:08,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:59:08,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:59:08,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:59:08,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:59:08,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:59:08,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:59:08,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:59:08,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:59:08,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:59:08,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:59:08,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:59:08,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:59:08,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:59:08,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:59:08,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:59:08,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:59:08,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:59:08,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:59:08,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:59:08,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:59:08,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:59:08,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:59:08,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:59:08,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:59:08,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:59:08,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:59:08,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:59:08,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:59:08,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:59:08,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 13:59:08,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:59:08,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:59:08,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:59:08,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:59:08,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:59:08,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:59:08,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:59:08,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:59:08,539 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:59:08,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:59:08,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:59:08,540 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:59:08,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:59:08,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:59:08,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:59:08,541 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:59:08,541 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:59:08,541 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:59:08,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:59:08,542 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:59:08,542 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:59:08,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:59:08,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:59:08,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:59:08,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:59:08,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:59:08,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:59:08,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:59:08,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:59:08,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:59:08,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:59:08,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 [2021-12-15 13:59:08,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:59:08,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:59:08,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:59:08,838 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:59:08,839 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:59:08,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2021-12-15 13:59:08,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7218c36/12d040f033a64c7e9273160aaee47077/FLAG75983793b [2021-12-15 13:59:09,406 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:59:09,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2021-12-15 13:59:09,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7218c36/12d040f033a64c7e9273160aaee47077/FLAG75983793b [2021-12-15 13:59:09,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7218c36/12d040f033a64c7e9273160aaee47077 [2021-12-15 13:59:09,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:59:09,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:59:09,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:59:09,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:59:09,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:59:09,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:59:09" (1/1) ... [2021-12-15 13:59:09,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a2d5e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:09, skipping insertion in model container [2021-12-15 13:59:09,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:59:09" (1/1) ... [2021-12-15 13:59:09,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:59:09,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:59:10,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:59:10,212 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 13:59:10,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@513d66aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:10, skipping insertion in model container [2021-12-15 13:59:10,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:59:10,214 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-15 13:59:10,217 INFO L158 Benchmark]: Toolchain (without parser) took 317.02ms. Allocated memory is still 90.2MB. Free memory was 57.1MB in the beginning and 64.4MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 13:59:10,218 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 90.2MB. Free memory is still 48.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 13:59:10,219 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.95ms. Allocated memory is still 90.2MB. Free memory was 57.0MB in the beginning and 64.4MB in the end (delta: -7.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-15 13:59:10,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 90.2MB. Free memory is still 48.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 314.95ms. Allocated memory is still 90.2MB. Free memory was 57.0MB in the beginning and 64.4MB in the end (delta: -7.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 575]: 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-realloc/array-realloc-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 a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:59:11,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:59:11,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:59:12,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:59:12,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:59:12,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:59:12,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:59:12,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:59:12,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:59:12,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:59:12,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:59:12,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:59:12,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:59:12,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:59:12,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:59:12,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:59:12,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:59:12,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:59:12,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:59:12,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:59:12,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:59:12,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:59:12,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:59:12,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:59:12,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:59:12,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:59:12,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:59:12,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:59:12,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:59:12,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:59:12,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:59:12,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:59:12,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:59:12,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:59:12,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:59:12,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:59:12,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:59:12,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:59:12,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:59:12,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:59:12,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:59:12,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-15 13:59:12,138 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:59:12,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:59:12,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:59:12,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:59:12,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:59:12,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:59:12,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:59:12,143 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:59:12,143 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:59:12,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:59:12,144 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:59:12,144 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:59:12,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:59:12,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:59:12,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:59:12,145 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:59:12,145 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:59:12,145 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:59:12,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:59:12,146 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:59:12,146 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 13:59:12,146 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 13:59:12,146 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:59:12,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:59:12,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:59:12,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:59:12,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:59:12,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:59:12,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:59:12,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:59:12,148 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 13:59:12,148 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 13:59:12,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:59:12,149 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 13:59:12,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 [2021-12-15 13:59:12,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:59:12,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:59:12,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:59:12,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:59:12,468 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:59:12,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2021-12-15 13:59:12,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e802791/f019e48a19b0419cac10db936c236d39/FLAGa26e59a22 [2021-12-15 13:59:12,995 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:59:12,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2021-12-15 13:59:13,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e802791/f019e48a19b0419cac10db936c236d39/FLAGa26e59a22 [2021-12-15 13:59:13,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6e802791/f019e48a19b0419cac10db936c236d39 [2021-12-15 13:59:13,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:59:13,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:59:13,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:59:13,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:59:13,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:59:13,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a3de4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13, skipping insertion in model container [2021-12-15 13:59:13,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:59:13,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:59:13,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:59:13,759 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-15 13:59:13,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:59:13,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:59:13,818 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:59:13,860 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:59:13,893 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:59:13,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13 WrapperNode [2021-12-15 13:59:13,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:59:13,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:59:13,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:59:13,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:59:13,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,958 INFO L137 Inliner]: procedures = 120, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2021-12-15 13:59:13,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:59:13,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:59:13,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:59:13,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:59:13,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:13,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:14,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:14,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:59:14,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:59:14,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:59:14,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:59:14,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (1/1) ... [2021-12-15 13:59:14,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:59:14,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:59:14,045 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 13:59:14,069 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 13:59:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 13:59:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:59:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 13:59:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 13:59:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:59:14,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-15 13:59:14,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 13:59:14,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:59:14,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:59:14,215 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:59:14,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:59:14,455 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:59:14,461 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:59:14,461 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 13:59:14,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:59:14 BoogieIcfgContainer [2021-12-15 13:59:14,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:59:14,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:59:14,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:59:14,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:59:14,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:59:13" (1/3) ... [2021-12-15 13:59:14,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbeb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:59:14, skipping insertion in model container [2021-12-15 13:59:14,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:13" (2/3) ... [2021-12-15 13:59:14,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbeb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:59:14, skipping insertion in model container [2021-12-15 13:59:14,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:59:14" (3/3) ... [2021-12-15 13:59:14,470 INFO L111 eAbstractionObserver]: Analyzing ICFG array-realloc-2.i [2021-12-15 13:59:14,475 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:59:14,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-12-15 13:59:14,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:59:14,535 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 13:59:14,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-12-15 13:59:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 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 13:59:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:59:14,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:14,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:59:14,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash 925662, now seen corresponding path program 1 times [2021-12-15 13:59:14,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:14,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866300837] [2021-12-15 13:59:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:14,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:14,583 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 13:59:14,590 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 13:59:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:14,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 13:59:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:14,707 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 13:59:14,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:14,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866300837] [2021-12-15 13:59:14,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866300837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:14,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:14,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:59:14,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518494811] [2021-12-15 13:59:14,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:14,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:59:14,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:59:14,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:14,747 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 13:59:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:14,829 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-12-15 13:59:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:59:14,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-15 13:59:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:14,843 INFO L225 Difference]: With dead ends: 37 [2021-12-15 13:59:14,843 INFO L226 Difference]: Without dead ends: 34 [2021-12-15 13:59:14,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 13:59:14,851 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:14,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-15 13:59:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-15 13:59:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.85) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 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 13:59:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-12-15 13:59:14,887 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 4 [2021-12-15 13:59:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:14,888 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-12-15 13:59:14,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 13:59:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-12-15 13:59:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:59:14,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:14,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:59:14,903 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 13:59:15,103 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 13:59:15,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2021-12-15 13:59:15,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:15,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502361111] [2021-12-15 13:59:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:15,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:15,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:15,107 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 13:59:15,108 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 13:59:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:15,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 13:59:15,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:15,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:59:15,291 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-12-15 13:59:15,292 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 1 case distinctions, treesize of input 13 treesize of output 18 [2021-12-15 13:59:15,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-15 13:59:15,325 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 13:59:15,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:15,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:15,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502361111] [2021-12-15 13:59:15,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502361111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:15,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:15,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:59:15,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746295717] [2021-12-15 13:59:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:15,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:59:15,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:59:15,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:15,333 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 13:59:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:15,440 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-12-15 13:59:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:59:15,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-15 13:59:15,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:15,442 INFO L225 Difference]: With dead ends: 51 [2021-12-15 13:59:15,442 INFO L226 Difference]: Without dead ends: 51 [2021-12-15 13:59:15,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 13:59:15,443 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:15,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-15 13:59:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-12-15 13:59:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 43 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2021-12-15 13:59:15,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 4 [2021-12-15 13:59:15,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:15,449 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2021-12-15 13:59:15,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 13:59:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2021-12-15 13:59:15,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:59:15,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:15,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:59:15,460 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 13:59:15,659 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 13:59:15,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash 925670, now seen corresponding path program 1 times [2021-12-15 13:59:15,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:15,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834454454] [2021-12-15 13:59:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:15,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:15,663 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 13:59:15,665 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 13:59:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:15,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 13:59:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:15,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-15 13:59:15,752 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-15 13:59:15,753 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 1 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:59:15,775 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 13:59:15,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:15,776 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:15,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834454454] [2021-12-15 13:59:15,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834454454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:15,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:15,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:59:15,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833028864] [2021-12-15 13:59:15,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:15,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:59:15,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:15,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:59:15,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:15,779 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 13:59:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:15,856 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-12-15 13:59:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:59:15,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-15 13:59:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:15,859 INFO L225 Difference]: With dead ends: 58 [2021-12-15 13:59:15,859 INFO L226 Difference]: Without dead ends: 58 [2021-12-15 13:59:15,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 13:59:15,860 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:15,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-15 13:59:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-12-15 13:59:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-12-15 13:59:15,866 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 4 [2021-12-15 13:59:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:15,866 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-12-15 13:59:15,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 13:59:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-12-15 13:59:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:59:15,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:15,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:59:15,882 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 13:59:16,076 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 13:59:16,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash 889567415, now seen corresponding path program 1 times [2021-12-15 13:59:16,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:16,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473984566] [2021-12-15 13:59:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:16,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:16,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:16,079 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 13:59:16,079 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 13:59:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:16,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 13:59:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:16,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-15 13:59:16,163 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 13:59:16,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:16,164 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:16,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473984566] [2021-12-15 13:59:16,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473984566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:16,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:16,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:59:16,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853791385] [2021-12-15 13:59:16,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:16,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:16,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:59:16,167 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 4 states, 4 states have (on average 1.5) 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 13:59:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:16,300 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2021-12-15 13:59:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:59:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 13:59:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:16,303 INFO L225 Difference]: With dead ends: 66 [2021-12-15 13:59:16,303 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 13:59:16,304 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 13:59:16,304 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:16,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 87 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 13:59:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2021-12-15 13:59:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 46 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 13:59:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-12-15 13:59:16,308 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 6 [2021-12-15 13:59:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:16,309 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-12-15 13:59:16,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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 13:59:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-12-15 13:59:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:59:16,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:16,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:16,319 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 13:59:16,510 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 13:59:16,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1806786797, now seen corresponding path program 1 times [2021-12-15 13:59:16,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:16,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763777390] [2021-12-15 13:59:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:16,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:16,512 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 13:59:16,516 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 13:59:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:16,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 13:59:16,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:16,598 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 13:59:16,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:16,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763777390] [2021-12-15 13:59:16,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763777390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:16,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:16,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:59:16,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051442303] [2021-12-15 13:59:16,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:16,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:16,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:59:16,601 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 13:59:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:16,760 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-12-15 13:59:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:59:16,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 13:59:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:16,761 INFO L225 Difference]: With dead ends: 68 [2021-12-15 13:59:16,761 INFO L226 Difference]: Without dead ends: 68 [2021-12-15 13:59:16,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 13:59:16,762 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:16,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 53 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-15 13:59:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2021-12-15 13:59:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 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 13:59:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2021-12-15 13:59:16,768 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 7 [2021-12-15 13:59:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:16,768 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2021-12-15 13:59:16,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 13:59:16,769 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2021-12-15 13:59:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:59:16,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:16,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:16,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-15 13:59:16,970 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 13:59:16,970 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:16,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1806786798, now seen corresponding path program 1 times [2021-12-15 13:59:16,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:16,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222519681] [2021-12-15 13:59:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:16,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:16,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:16,972 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 13:59:16,973 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 13:59:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:17,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-15 13:59:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:17,087 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 13:59:17,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:17,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222519681] [2021-12-15 13:59:17,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222519681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:17,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:17,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:59:17,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950719105] [2021-12-15 13:59:17,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:17,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:59:17,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:17,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:59:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:59:17,089 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 13:59:17,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:17,193 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-12-15 13:59:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:59:17,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-15 13:59:17,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:17,194 INFO L225 Difference]: With dead ends: 61 [2021-12-15 13:59:17,195 INFO L226 Difference]: Without dead ends: 61 [2021-12-15 13:59:17,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:59:17,196 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:17,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-15 13:59:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2021-12-15 13:59:17,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.65) internal successors, (66), 50 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 13:59:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2021-12-15 13:59:17,200 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 7 [2021-12-15 13:59:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:17,200 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2021-12-15 13:59:17,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 13:59:17,201 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2021-12-15 13:59:17,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:59:17,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:17,201 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:17,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-15 13:59:17,407 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 13:59:17,408 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:17,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1454266352, now seen corresponding path program 1 times [2021-12-15 13:59:17,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:17,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335180479] [2021-12-15 13:59:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:17,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:17,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:17,409 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 13:59:17,410 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 13:59:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 13:59:17,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:17,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:59:17,518 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 13:59:17,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:17,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:17,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335180479] [2021-12-15 13:59:17,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335180479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:17,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:17,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:59:17,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075191802] [2021-12-15 13:59:17,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:17,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:17,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:17,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:59:17,521 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 13:59:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:17,605 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-12-15 13:59:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:59:17,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 13:59:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:17,607 INFO L225 Difference]: With dead ends: 66 [2021-12-15 13:59:17,607 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 13:59:17,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 13:59:17,609 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:17,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 13:59:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-12-15 13:59:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2021-12-15 13:59:17,614 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 10 [2021-12-15 13:59:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:17,614 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-12-15 13:59:17,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 13:59:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2021-12-15 13:59:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:59:17,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:17,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:17,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-15 13:59:17,819 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 13:59:17,820 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2132584042, now seen corresponding path program 1 times [2021-12-15 13:59:17,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232946367] [2021-12-15 13:59:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:17,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:17,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:17,822 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 13:59:17,823 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 13:59:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 13:59:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:17,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-12-15 13:59:17,985 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 13:59:17,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:17,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:17,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232946367] [2021-12-15 13:59:17,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232946367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:17,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:17,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:59:17,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007594677] [2021-12-15 13:59:17,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:17,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:59:17,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:17,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:59:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:59:17,987 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 13:59:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:18,136 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2021-12-15 13:59:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:59:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-12-15 13:59:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:18,137 INFO L225 Difference]: With dead ends: 65 [2021-12-15 13:59:18,137 INFO L226 Difference]: Without dead ends: 65 [2021-12-15 13:59:18,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:59:18,138 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:18,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 69 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-15 13:59:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-12-15 13:59:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 58 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2021-12-15 13:59:18,143 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 11 [2021-12-15 13:59:18,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:18,144 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-12-15 13:59:18,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 13:59:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2021-12-15 13:59:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:59:18,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:18,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:18,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-15 13:59:18,353 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 13:59:18,353 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1685595954, now seen corresponding path program 1 times [2021-12-15 13:59:18,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:18,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548499457] [2021-12-15 13:59:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:18,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:18,356 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 13:59:18,358 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 13:59:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:18,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 13:59:18,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:18,430 INFO L354 Elim1Store]: treesize reduction 12, result has 57.1 percent of original size [2021-12-15 13:59:18,430 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 1 case distinctions, treesize of input 13 treesize of output 26 [2021-12-15 13:59:18,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-15 13:59:18,487 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 13:59:18,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:18,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:18,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548499457] [2021-12-15 13:59:18,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548499457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:18,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:18,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:59:18,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117354555] [2021-12-15 13:59:18,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:18,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:18,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:18,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:59:18,490 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 13:59:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:18,616 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2021-12-15 13:59:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:59:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 13:59:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:18,617 INFO L225 Difference]: With dead ends: 64 [2021-12-15 13:59:18,617 INFO L226 Difference]: Without dead ends: 64 [2021-12-15 13:59:18,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 13:59:18,618 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:18,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-15 13:59:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2021-12-15 13:59:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2021-12-15 13:59:18,624 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 12 [2021-12-15 13:59:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:18,625 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2021-12-15 13:59:18,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 13:59:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2021-12-15 13:59:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:59:18,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:18,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:18,634 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 13:59:18,834 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 13:59:18,834 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:18,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1602458348, now seen corresponding path program 1 times [2021-12-15 13:59:18,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:18,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807229760] [2021-12-15 13:59:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:18,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:18,836 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 13:59:18,837 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 13:59:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 13:59:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:18,935 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-15 13:59:18,935 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-15 13:59:18,960 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 13:59:18,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:18,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:18,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807229760] [2021-12-15 13:59:18,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807229760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:18,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:18,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:59:18,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778251688] [2021-12-15 13:59:18,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:18,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:18,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:18,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:18,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:59:18,962 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 13:59:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:19,045 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-12-15 13:59:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:59:19,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 13:59:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:19,046 INFO L225 Difference]: With dead ends: 62 [2021-12-15 13:59:19,046 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 13:59:19,046 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 13:59:19,047 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:19,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 13:59:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-12-15 13:59:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.530612244897959) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 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 13:59:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2021-12-15 13:59:19,050 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 12 [2021-12-15 13:59:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:19,051 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2021-12-15 13:59:19,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 13:59:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2021-12-15 13:59:19,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:59:19,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:19,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:19,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-15 13:59:19,259 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 13:59:19,259 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:19,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1602458347, now seen corresponding path program 1 times [2021-12-15 13:59:19,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:19,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330507520] [2021-12-15 13:59:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:19,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:19,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:19,261 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 13:59:19,262 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 13:59:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:19,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 13:59:19,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:19,381 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 13:59:19,433 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 13:59:19,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:19,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:19,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330507520] [2021-12-15 13:59:19,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330507520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:19,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:19,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 13:59:19,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913412058] [2021-12-15 13:59:19,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:19,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:59:19,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:19,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:59:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:59:19,436 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 13:59:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:19,572 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-12-15 13:59:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:59:19,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 13:59:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:19,576 INFO L225 Difference]: With dead ends: 90 [2021-12-15 13:59:19,576 INFO L226 Difference]: Without dead ends: 90 [2021-12-15 13:59:19,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:59:19,577 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 73 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:19,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 79 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-15 13:59:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-12-15 13:59:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.509433962264151) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-12-15 13:59:19,581 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 12 [2021-12-15 13:59:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:19,581 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-12-15 13:59:19,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 13:59:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-12-15 13:59:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:59:19,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:19,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:19,589 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 13:59:19,782 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 13:59:19,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:19,783 INFO L85 PathProgramCache]: Analyzing trace with hash 713867117, now seen corresponding path program 1 times [2021-12-15 13:59:19,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:19,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910002639] [2021-12-15 13:59:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:19,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:19,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:19,784 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 13:59:19,786 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 13:59:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:19,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 13:59:19,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:19,880 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 13:59:19,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:19,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:19,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910002639] [2021-12-15 13:59:19,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910002639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:19,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:19,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:59:19,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249007203] [2021-12-15 13:59:19,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:19,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:19,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:59:19,882 INFO L87 Difference]: Start difference. First operand 63 states and 80 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 13:59:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:19,915 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2021-12-15 13:59:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:59:19,916 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 13:59:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:19,917 INFO L225 Difference]: With dead ends: 60 [2021-12-15 13:59:19,917 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 13:59:19,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 13:59:19,918 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:19,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 53 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 13:59:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-15 13:59:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.52) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-12-15 13:59:19,921 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2021-12-15 13:59:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:19,921 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-12-15 13:59:19,921 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 13:59:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-12-15 13:59:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:59:19,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:19,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:19,933 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 13:59:20,131 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 13:59:20,131 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1863398776, now seen corresponding path program 1 times [2021-12-15 13:59:20,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:20,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832219208] [2021-12-15 13:59:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:20,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:20,134 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 13:59:20,135 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 13:59:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 13:59:20,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:20,261 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-12-15 13:59:20,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2021-12-15 13:59:20,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-15 13:59:20,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:59:20,406 INFO L354 Elim1Store]: treesize reduction 18, result has 53.8 percent of original size [2021-12-15 13:59:20,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 33 [2021-12-15 13:59:20,561 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 13:59:20,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:20,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:20,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832219208] [2021-12-15 13:59:20,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832219208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:20,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:20,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 13:59:20,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58295691] [2021-12-15 13:59:20,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:59:20,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:59:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:59:20,564 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 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 13:59:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:20,885 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-12-15 13:59:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:59:20,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 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 13:59:20,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:20,886 INFO L225 Difference]: With dead ends: 90 [2021-12-15 13:59:20,886 INFO L226 Difference]: Without dead ends: 90 [2021-12-15 13:59:20,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:59:20,887 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 67 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:20,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 150 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 138 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2021-12-15 13:59:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-15 13:59:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2021-12-15 13:59:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.52) internal successors, (76), 59 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-12-15 13:59:20,890 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2021-12-15 13:59:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:20,890 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-12-15 13:59:20,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 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 13:59:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-12-15 13:59:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:59:20,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:20,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:20,903 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 13:59:21,100 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 13:59:21,101 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1863398777, now seen corresponding path program 1 times [2021-12-15 13:59:21,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:21,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257637769] [2021-12-15 13:59:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:21,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:21,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:21,103 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 13:59:21,104 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 13:59:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:21,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 13:59:21,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:21,211 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-15 13:59:21,211 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 1 case distinctions, treesize of input 13 treesize of output 23 [2021-12-15 13:59:21,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-15 13:59:21,342 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:59:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-15 13:59:21,416 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 13:59:21,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:21,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:21,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257637769] [2021-12-15 13:59:21,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257637769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:21,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:21,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 13:59:21,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984672082] [2021-12-15 13:59:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:21,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:59:21,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:59:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:59:21,418 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 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 13:59:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:21,714 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2021-12-15 13:59:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:59:21,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 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 13:59:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:21,715 INFO L225 Difference]: With dead ends: 91 [2021-12-15 13:59:21,715 INFO L226 Difference]: Without dead ends: 91 [2021-12-15 13:59:21,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-12-15 13:59:21,716 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 188 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:21,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 84 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 95 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2021-12-15 13:59:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-15 13:59:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-12-15 13:59:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 71 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 13:59:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2021-12-15 13:59:21,718 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 13 [2021-12-15 13:59:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:21,719 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2021-12-15 13:59:21,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 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 13:59:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2021-12-15 13:59:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:59:21,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:21,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:21,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-15 13:59:21,920 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 13:59:21,920 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1863406910, now seen corresponding path program 1 times [2021-12-15 13:59:21,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:21,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159140018] [2021-12-15 13:59:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:21,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:21,922 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 13:59:21,922 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 13:59:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:21,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 13:59:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:22,010 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 13:59:22,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:22,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:22,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159140018] [2021-12-15 13:59:22,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159140018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:22,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:22,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:59:22,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47495262] [2021-12-15 13:59:22,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:22,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:22,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:22,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:59:22,013 INFO L87 Difference]: Start difference. First operand 72 states and 90 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 13:59:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:22,055 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-12-15 13:59:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:59:22,056 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 13:59:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:22,056 INFO L225 Difference]: With dead ends: 67 [2021-12-15 13:59:22,057 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 13:59:22,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 13:59:22,057 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:22,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 13:59:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-15 13:59:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2021-12-15 13:59:22,063 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 13 [2021-12-15 13:59:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:22,063 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2021-12-15 13:59:22,063 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 13:59:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2021-12-15 13:59:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 13:59:22,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:22,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:22,074 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 13:59:22,271 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 13:59:22,271 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:22,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1879468086, now seen corresponding path program 1 times [2021-12-15 13:59:22,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:22,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451988640] [2021-12-15 13:59:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:22,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:22,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:22,273 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 13:59:22,274 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 13:59:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 13:59:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:22,393 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 13:59:22,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:22,418 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-15 13:59:22,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-12-15 13:59:22,442 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 13:59:22,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:22,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451988640] [2021-12-15 13:59:22,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451988640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:22,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:59:22,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-12-15 13:59:22,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832293789] [2021-12-15 13:59:22,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:22,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:22,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:22,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:22,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:59:22,445 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 13:59:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:22,513 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-12-15 13:59:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:59:22,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 17 [2021-12-15 13:59:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:22,514 INFO L225 Difference]: With dead ends: 68 [2021-12-15 13:59:22,514 INFO L226 Difference]: Without dead ends: 68 [2021-12-15 13:59:22,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 1 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 13:59:22,515 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:22,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-15 13:59:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2021-12-15 13:59:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 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 13:59:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-12-15 13:59:22,516 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2021-12-15 13:59:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:22,516 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-12-15 13:59:22,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 13:59:22,517 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-12-15 13:59:22,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-15 13:59:22,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:22,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:22,524 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 13:59:22,718 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 13:59:22,718 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:22,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1866031452, now seen corresponding path program 1 times [2021-12-15 13:59:22,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:22,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330522113] [2021-12-15 13:59:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:22,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:22,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:22,720 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 13:59:22,721 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 13:59:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:22,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-15 13:59:22,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:22,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:59:22,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:59:22,924 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 13:59:22,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:22,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-15 13:59:23,019 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 13:59:23,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:23,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330522113] [2021-12-15 13:59:23,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330522113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:23,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:59:23,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-12-15 13:59:23,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776968284] [2021-12-15 13:59:23,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:23,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:59:23,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:23,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:59:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:59:23,021 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 13:59:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:23,174 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-15 13:59:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:59:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 18 [2021-12-15 13:59:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:23,175 INFO L225 Difference]: With dead ends: 49 [2021-12-15 13:59:23,176 INFO L226 Difference]: Without dead ends: 49 [2021-12-15 13:59:23,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:59:23,176 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:23,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 36 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-15 13:59:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-12-15 13:59:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-12-15 13:59:23,179 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 18 [2021-12-15 13:59:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:23,179 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-12-15 13:59:23,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 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 13:59:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-12-15 13:59:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 13:59:23,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:23,180 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 13:59:23,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-15 13:59:23,389 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 13:59:23,389 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2012400074, now seen corresponding path program 1 times [2021-12-15 13:59:23,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:23,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761294820] [2021-12-15 13:59:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:23,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:23,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:23,391 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 13:59:23,392 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 13:59:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 13:59:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:23,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-15 13:59:23,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:59:23,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:59:23,850 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 13:59:23,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:23,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-15 13:59:24,045 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 13:59:24,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761294820] [2021-12-15 13:59:24,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761294820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:24,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:59:24,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-12-15 13:59:24,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490857108] [2021-12-15 13:59:24,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:24,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 13:59:24,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 13:59:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:59:24,047 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:24,087 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-12-15 13:59:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:59:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 13:59:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:24,092 INFO L225 Difference]: With dead ends: 56 [2021-12-15 13:59:24,092 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 13:59:24,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:59:24,093 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:24,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-15 13:59:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 13:59:24,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-15 13:59:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.297872340425532) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-15 13:59:24,095 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 19 [2021-12-15 13:59:24,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:24,095 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-15 13:59:24,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,095 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-15 13:59:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 13:59:24,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:24,096 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 13:59:24,107 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 13:59:24,296 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 13:59:24,296 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1581502644, now seen corresponding path program 1 times [2021-12-15 13:59:24,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:24,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22014886] [2021-12-15 13:59:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:24,299 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 13:59:24,313 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 13:59:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 13:59:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:24,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-15 13:59:24,434 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 13:59:24,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:24,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:24,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22014886] [2021-12-15 13:59:24,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22014886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:24,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:24,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 13:59:24,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502892143] [2021-12-15 13:59:24,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:24,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:59:24,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:59:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:59:24,438 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:24,545 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-12-15 13:59:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:59:24,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 13:59:24,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:24,546 INFO L225 Difference]: With dead ends: 52 [2021-12-15 13:59:24,547 INFO L226 Difference]: Without dead ends: 52 [2021-12-15 13:59:24,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:59:24,547 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:24,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-15 13:59:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-12-15 13:59:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 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 13:59:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-15 13:59:24,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 19 [2021-12-15 13:59:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:24,549 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-15 13:59:24,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-15 13:59:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 13:59:24,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:24,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:24,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-15 13:59:24,750 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 13:59:24,750 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2040107238, now seen corresponding path program 1 times [2021-12-15 13:59:24,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:24,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012665830] [2021-12-15 13:59:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:24,756 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 13:59:24,757 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 13:59:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 13:59:24,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:24,896 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-15 13:59:24,896 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 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-15 13:59:24,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:59:24,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-15 13:59:25,004 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 13:59:25,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:25,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-12-15 13:59:25,207 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 13:59:25,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012665830] [2021-12-15 13:59:25,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012665830] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:25,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:59:25,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-15 13:59:25,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044590044] [2021-12-15 13:59:25,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:59:25,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:59:25,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:59:25,209 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 13:59:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:25,424 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-12-15 13:59:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:59:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 13:59:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:25,425 INFO L225 Difference]: With dead ends: 47 [2021-12-15 13:59:25,425 INFO L226 Difference]: Without dead ends: 47 [2021-12-15 13:59:25,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:59:25,426 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:25,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2021-12-15 13:59:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-15 13:59:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-15 13:59:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-15 13:59:25,427 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 20 [2021-12-15 13:59:25,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:25,428 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-15 13:59:25,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 13:59:25,428 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-15 13:59:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 13:59:25,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:25,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:25,440 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 13:59:25,635 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 13:59:25,635 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1247947063, now seen corresponding path program 1 times [2021-12-15 13:59:25,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:25,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579342726] [2021-12-15 13:59:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:25,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:25,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:25,637 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 13:59:25,638 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 13:59:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:25,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 13:59:25,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:25,792 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 13:59:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:25,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:26,229 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:59:26,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579342726] [2021-12-15 13:59:26,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579342726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:26,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 13:59:26,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-15 13:59:26,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859508015] [2021-12-15 13:59:26,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:26,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 13:59:26,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:59:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 13:59:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:59:26,230 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:27,895 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2021-12-15 13:59:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:59:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 13:59:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:27,897 INFO L225 Difference]: With dead ends: 147 [2021-12-15 13:59:27,897 INFO L226 Difference]: Without dead ends: 147 [2021-12-15 13:59:27,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2021-12-15 13:59:27,898 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 404 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:27,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 130 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 13:59:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-15 13:59:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2021-12-15 13:59:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.3614457831325302) internal successors, (113), 89 states have internal predecessors, (113), 0 states have call successors, (0), 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 13:59:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2021-12-15 13:59:27,902 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 20 [2021-12-15 13:59:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:27,902 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2021-12-15 13:59:27,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2021-12-15 13:59:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 13:59:27,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:27,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:27,915 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 13:59:28,113 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 13:59:28,113 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 10 more)] === [2021-12-15 13:59:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:28,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1181184967, now seen corresponding path program 1 times [2021-12-15 13:59:28,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:59:28,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917599425] [2021-12-15 13:59:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:28,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:59:28,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:59:28,115 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 13:59:28,115 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 13:59:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 13:59:28,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:28,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-12-15 13:59:28,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:59:33,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-12-15 13:59:36,029 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 13:59:36,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:36,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44