./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/array03-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:57:14,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:57:14,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:57:14,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:57:14,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:57:14,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:57:14,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:57:14,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:57:14,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:57:14,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:57:14,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:57:14,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:57:14,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:57:14,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:57:14,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:57:14,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:57:14,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:57:14,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:57:14,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:57:14,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:57:14,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:57:14,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:57:14,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:57:14,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:57:14,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:57:14,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:57:14,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:57:14,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:57:14,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:57:14,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:57:14,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:57:14,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:57:14,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:57:14,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:57:14,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:57:14,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:57:14,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:57:14,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:57:14,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:57:14,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:57:14,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:57:14,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 23:57:14,572 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:57:14,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:57:14,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:57:14,573 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:57:14,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:57:14,574 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:57:14,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:57:14,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:57:14,575 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:57:14,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:57:14,575 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:57:14,575 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:57:14,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:57:14,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:57:14,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:57:14,576 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:57:14,576 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:57:14,576 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:57:14,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:57:14,577 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:57:14,577 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:57:14,577 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:57:14,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:57:14,578 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:57:14,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:57:14,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:14,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:57:14,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:57:14,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 23:57:14,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 23:57:14,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:57:14,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-12-21 23:57:14,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:57:14,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:57:14,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:57:14,857 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:57:14,858 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:57:14,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-12-21 23:57:14,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487f52232/932cf77770c547b8971fc779174e2575/FLAG75d8e4f00 [2021-12-21 23:57:15,326 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:57:15,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-12-21 23:57:15,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487f52232/932cf77770c547b8971fc779174e2575/FLAG75d8e4f00 [2021-12-21 23:57:15,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/487f52232/932cf77770c547b8971fc779174e2575 [2021-12-21 23:57:15,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:57:15,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:57:15,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:15,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:57:15,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:57:15,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a35c01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15, skipping insertion in model container [2021-12-21 23:57:15,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:57:15,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:15,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:15,993 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) [2021-12-21 23:57:15,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1fa748cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15, skipping insertion in model container [2021-12-21 23:57:15,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:15,995 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 23:57:15,997 INFO L158 Benchmark]: Toolchain (without parser) took 333.09ms. Allocated memory is still 125.8MB. Free memory was 89.3MB in the beginning and 98.8MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 23:57:15,998 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 125.8MB. Free memory was 97.1MB in the beginning and 97.1MB in the end (delta: 26.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 23:57:16,000 INFO L158 Benchmark]: CACSL2BoogieTranslator took 327.83ms. Allocated memory is still 125.8MB. Free memory was 89.3MB in the beginning and 98.8MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 23:57:16,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 125.8MB. Free memory was 97.1MB in the beginning and 97.1MB in the end (delta: 26.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 327.83ms. Allocated memory is still 125.8MB. Free memory was 89.3MB in the beginning and 98.8MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 535]: Unsupported Syntax Found a cast between two array/pointer types 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/array03-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:57:17,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:57:17,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:57:17,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:57:17,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:57:17,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:57:17,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:57:17,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:57:17,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:57:17,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:57:17,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:57:17,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:57:17,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:57:17,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:57:17,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:57:17,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:57:17,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:57:17,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:57:17,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:57:17,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:57:17,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:57:17,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:57:17,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:57:17,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:57:17,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:57:17,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:57:17,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:57:17,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:57:17,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:57:17,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:57:17,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:57:17,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:57:17,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:57:17,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:57:17,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:57:17,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:57:17,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:57:17,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:57:17,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:57:17,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:57:17,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:57:17,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-21 23:57:17,930 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:57:17,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:57:17,932 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:57:17,932 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:57:17,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:57:17,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:57:17,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:57:17,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:57:17,935 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:57:17,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:57:17,936 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:57:17,936 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:57:17,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:57:17,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:57:17,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:57:17,936 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:57:17,937 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:57:17,937 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:57:17,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:57:17,937 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:57:17,937 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 23:57:17,937 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 23:57:17,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:57:17,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:57:17,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:57:17,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:57:17,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:57:17,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:17,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:57:17,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:57:17,944 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 23:57:17,944 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 23:57:17,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:57:17,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 23:57:17,945 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-12-21 23:57:18,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:57:18,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:57:18,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:57:18,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:57:18,312 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:57:18,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-12-21 23:57:18,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f64db125/d6940ee8bf9141a3895fd257f3bf5b0d/FLAG805666531 [2021-12-21 23:57:18,853 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:57:18,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-12-21 23:57:18,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f64db125/d6940ee8bf9141a3895fd257f3bf5b0d/FLAG805666531 [2021-12-21 23:57:19,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f64db125/d6940ee8bf9141a3895fd257f3bf5b0d [2021-12-21 23:57:19,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:57:19,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:57:19,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:19,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:57:19,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:57:19,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7005e184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19, skipping insertion in model container [2021-12-21 23:57:19,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:57:19,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:19,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:19,480 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 23:57:19,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:19,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:19,531 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 23:57:19,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:19,585 INFO L208 MainTranslator]: Completed translation [2021-12-21 23:57:19,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19 WrapperNode [2021-12-21 23:57:19,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:19,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 23:57:19,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 23:57:19,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 23:57:19,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,628 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-12-21 23:57:19,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 23:57:19,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 23:57:19,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 23:57:19,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 23:57:19,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 23:57:19,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 23:57:19,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 23:57:19,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 23:57:19,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (1/1) ... [2021-12-21 23:57:19,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:19,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:19,696 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) [2021-12-21 23:57:19,705 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 [2021-12-21 23:57:19,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-21 23:57:19,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 23:57:19,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 23:57:19,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-21 23:57:19,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 23:57:19,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 23:57:19,808 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 23:57:19,809 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 23:57:20,183 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 23:57:20,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 23:57:20,188 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 23:57:20,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:57:20 BoogieIcfgContainer [2021-12-21 23:57:20,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 23:57:20,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 23:57:20,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 23:57:20,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 23:57:20,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:57:19" (1/3) ... [2021-12-21 23:57:20,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4bef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:57:20, skipping insertion in model container [2021-12-21 23:57:20,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:19" (2/3) ... [2021-12-21 23:57:20,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4bef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:57:20, skipping insertion in model container [2021-12-21 23:57:20,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:57:20" (3/3) ... [2021-12-21 23:57:20,198 INFO L111 eAbstractionObserver]: Analyzing ICFG array03-alloca-2.i [2021-12-21 23:57:20,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 23:57:20,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-12-21 23:57:20,254 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 23:57:20,261 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 [2021-12-21 23:57:20,261 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-12-21 23:57:20,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:20,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:20,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:20,297 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-21 23:57:20,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:20,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123695252] [2021-12-21 23:57:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:20,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:20,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:20,323 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) [2021-12-21 23:57:20,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 23:57:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:20,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:20,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 23:57:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:20,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:20,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:20,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123695252] [2021-12-21 23:57:20,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123695252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:20,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:20,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 23:57:20,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465583221] [2021-12-21 23:57:20,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:20,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:57:20,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:57:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:57:20,531 INFO L87 Difference]: Start difference. First operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:20,651 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-21 23:57:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:57:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:57:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:20,661 INFO L225 Difference]: With dead ends: 44 [2021-12-21 23:57:20,661 INFO L226 Difference]: Without dead ends: 42 [2021-12-21 23:57:20,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:57:20,666 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:20,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-21 23:57:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-21 23:57:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-12-21 23:57:20,694 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-12-21 23:57:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:20,694 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-12-21 23:57:20,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-12-21 23:57:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:20,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:20,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:20,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:20,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:20,905 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:20,905 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-21 23:57:20,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:20,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38919989] [2021-12-21 23:57:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:20,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:20,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:20,909 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) [2021-12-21 23:57:20,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 23:57:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 23:57:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:21,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 23:57:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:21,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:21,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:21,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38919989] [2021-12-21 23:57:21,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38919989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:21,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:21,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:21,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632473869] [2021-12-21 23:57:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:21,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:21,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:21,057 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:21,387 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-12-21 23:57:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:21,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:57:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:21,390 INFO L225 Difference]: With dead ends: 85 [2021-12-21 23:57:21,390 INFO L226 Difference]: Without dead ends: 85 [2021-12-21 23:57:21,390 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 [2021-12-21 23:57:21,391 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 48 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:21,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 166 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 23:57:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-21 23:57:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 45. [2021-12-21 23:57:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-12-21 23:57:21,402 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 6 [2021-12-21 23:57:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:21,402 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-12-21 23:57:21,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-12-21 23:57:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 23:57:21,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:21,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 23:57:21,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:21,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,616 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-21 23:57:21,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496736481] [2021-12-21 23:57:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:21,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:21,618 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) [2021-12-21 23:57:21,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 23:57:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 23:57:21,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:21,712 INFO L387 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 [2021-12-21 23:57:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:21,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:21,801 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:21,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496736481] [2021-12-21 23:57:21,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496736481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:21,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:21,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:21,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979776830] [2021-12-21 23:57:21,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:21,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:21,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:21,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:21,807 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:21,853 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-12-21 23:57:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 23:57:21,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:21,857 INFO L225 Difference]: With dead ends: 47 [2021-12-21 23:57:21,857 INFO L226 Difference]: Without dead ends: 47 [2021-12-21 23:57:21,859 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 [2021-12-21 23:57:21,861 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:21,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 107 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-21 23:57:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-21 23:57:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-21 23:57:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-21 23:57:21,874 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 6 [2021-12-21 23:57:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:21,874 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-21 23:57:21,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-21 23:57:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 23:57:21,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:21,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:21,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:22,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,088 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2021-12-21 23:57:22,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:22,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733007838] [2021-12-21 23:57:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:22,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:22,091 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) [2021-12-21 23:57:22,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 23:57:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:22,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:22,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:22,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 23:57:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:22,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:22,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:22,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733007838] [2021-12-21 23:57:22,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733007838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:22,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:22,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:22,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998927769] [2021-12-21 23:57:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:22,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:22,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:22,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:22,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:22,187 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:22,334 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-21 23:57:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:22,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 23:57:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:22,336 INFO L225 Difference]: With dead ends: 39 [2021-12-21 23:57:22,336 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 23:57:22,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:22,337 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:22,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:22,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 23:57:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-21 23:57:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.5) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-12-21 23:57:22,340 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 8 [2021-12-21 23:57:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:22,340 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-12-21 23:57:22,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-12-21 23:57:22,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 23:57:22,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:22,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:22,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-21 23:57:22,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,554 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2021-12-21 23:57:22,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:22,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747920179] [2021-12-21 23:57:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:22,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:22,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:22,556 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) [2021-12-21 23:57:22,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 23:57:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:22,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:57:22,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:22,632 INFO L387 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 [2021-12-21 23:57:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:22,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:22,752 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:22,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747920179] [2021-12-21 23:57:22,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747920179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:22,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:22,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:22,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957265477] [2021-12-21 23:57:22,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:22,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:22,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:22,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:22,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:22,754 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:22,786 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-21 23:57:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 23:57:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:22,789 INFO L225 Difference]: With dead ends: 42 [2021-12-21 23:57:22,789 INFO L226 Difference]: Without dead ends: 42 [2021-12-21 23:57:22,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 23:57:22,791 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:22,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2021-12-21 23:57:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-21 23:57:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-21 23:57:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-12-21 23:57:22,800 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 8 [2021-12-21 23:57:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:22,800 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-12-21 23:57:22,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-12-21 23:57:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 23:57:22,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:22,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:22,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:23,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,012 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:23,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052370, now seen corresponding path program 1 times [2021-12-21 23:57:23,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:23,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673074960] [2021-12-21 23:57:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:23,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:23,014 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) [2021-12-21 23:57:23,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 23:57:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:23,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:23,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:23,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673074960] [2021-12-21 23:57:23,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673074960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:23,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:23,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:23,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905689842] [2021-12-21 23:57:23,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:23,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:23,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:23,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:23,093 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:23,128 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-21 23:57:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:23,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 23:57:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:23,129 INFO L225 Difference]: With dead ends: 41 [2021-12-21 23:57:23,129 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 23:57:23,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:23,130 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:23,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 65 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 23:57:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-12-21 23:57:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.5) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-21 23:57:23,133 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 9 [2021-12-21 23:57:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:23,133 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-21 23:57:23,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-21 23:57:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:57:23,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:23,134 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:23,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:23,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,342 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-21 23:57:23,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:23,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543717726] [2021-12-21 23:57:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:23,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:23,344 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) [2021-12-21 23:57:23,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 23:57:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:23,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:23,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:23,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:23,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543717726] [2021-12-21 23:57:23,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543717726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:23,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:23,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:57:23,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958656553] [2021-12-21 23:57:23,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:23,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:57:23,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:57:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:23,530 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:23,587 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-12-21 23:57:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 23:57:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:23,594 INFO L225 Difference]: With dead ends: 69 [2021-12-21 23:57:23,594 INFO L226 Difference]: Without dead ends: 69 [2021-12-21 23:57:23,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:23,595 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 187 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:23,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 127 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-21 23:57:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-12-21 23:57:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-21 23:57:23,599 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 10 [2021-12-21 23:57:23,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:23,602 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-21 23:57:23,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-21 23:57:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:57:23,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:23,604 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:23,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:23,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,811 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-21 23:57:23,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481148562] [2021-12-21 23:57:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:23,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:23,813 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) [2021-12-21 23:57:23,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 23:57:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:23,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 23:57:23,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:23,878 INFO L387 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 [2021-12-21 23:57:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:24,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:24,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:24,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481148562] [2021-12-21 23:57:24,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481148562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:24,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:24,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-21 23:57:24,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289237200] [2021-12-21 23:57:24,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:24,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 23:57:24,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 23:57:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:24,529 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:25,110 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-12-21 23:57:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 23:57:25,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 23:57:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:25,112 INFO L225 Difference]: With dead ends: 77 [2021-12-21 23:57:25,112 INFO L226 Difference]: Without dead ends: 77 [2021-12-21 23:57:25,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:57:25,112 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 172 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:25,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 86 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 7 Unchecked, 0.5s Time] [2021-12-21 23:57:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-21 23:57:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2021-12-21 23:57:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.380952380952381) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-21 23:57:25,115 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 10 [2021-12-21 23:57:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:25,116 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-21 23:57:25,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-21 23:57:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:57:25,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:25,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:25,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-21 23:57:25,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:25,325 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2021-12-21 23:57:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135265049] [2021-12-21 23:57:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:25,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:25,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:25,327 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) [2021-12-21 23:57:25,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 23:57:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:25,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 23:57:25,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:25,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 23:57:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:25,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:25,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:25,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135265049] [2021-12-21 23:57:25,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135265049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:25,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:25,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:25,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065749298] [2021-12-21 23:57:25,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:25,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:25,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:25,494 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:25,769 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-12-21 23:57:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:25,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:57:25,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:25,770 INFO L225 Difference]: With dead ends: 95 [2021-12-21 23:57:25,770 INFO L226 Difference]: Without dead ends: 95 [2021-12-21 23:57:25,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 23:57:25,771 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:25,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 107 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-21 23:57:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2021-12-21 23:57:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-12-21 23:57:25,775 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 12 [2021-12-21 23:57:25,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:25,775 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-12-21 23:57:25,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-12-21 23:57:25,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:57:25,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:25,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:25,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:25,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:25,985 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:25,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2021-12-21 23:57:25,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:25,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992222643] [2021-12-21 23:57:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:25,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:25,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:25,987 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) [2021-12-21 23:57:26,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 23:57:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 23:57:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:26,052 INFO L387 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 [2021-12-21 23:57:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:26,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:26,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:26,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992222643] [2021-12-21 23:57:26,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992222643] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:26,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 23:57:26,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-21 23:57:26,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830536237] [2021-12-21 23:57:26,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:26,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:26,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:26,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:26,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-21 23:57:26,656 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:26,902 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-12-21 23:57:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:57:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:26,903 INFO L225 Difference]: With dead ends: 65 [2021-12-21 23:57:26,904 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 23:57:26,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:26,904 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:26,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 36 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 23:57:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2021-12-21 23:57:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-21 23:57:26,907 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 12 [2021-12-21 23:57:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:26,908 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-21 23:57:26,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-21 23:57:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 23:57:26,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:26,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:26,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:27,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:27,111 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 363893485, now seen corresponding path program 1 times [2021-12-21 23:57:27,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:27,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302706109] [2021-12-21 23:57:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:27,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:27,113 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) [2021-12-21 23:57:27,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 23:57:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:27,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 23:57:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:27,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:27,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:27,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302706109] [2021-12-21 23:57:27,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302706109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:27,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:27,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:27,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508467257] [2021-12-21 23:57:27,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:27,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:27,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:27,204 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:27,335 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2021-12-21 23:57:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:27,335 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 [2021-12-21 23:57:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:27,336 INFO L225 Difference]: With dead ends: 82 [2021-12-21 23:57:27,336 INFO L226 Difference]: Without dead ends: 82 [2021-12-21 23:57:27,336 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 [2021-12-21 23:57:27,337 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:27,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 81 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-21 23:57:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2021-12-21 23:57:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-21 23:57:27,339 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-12-21 23:57:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:27,340 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-21 23:57:27,340 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) [2021-12-21 23:57:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-21 23:57:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 23:57:27,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:27,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:27,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:27,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:27,549 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958063, now seen corresponding path program 1 times [2021-12-21 23:57:27,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:27,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459375133] [2021-12-21 23:57:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:27,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:27,551 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) [2021-12-21 23:57:27,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 23:57:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 23:57:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:27,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:27,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:27,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459375133] [2021-12-21 23:57:27,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459375133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:27,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:27,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-21 23:57:27,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76365803] [2021-12-21 23:57:27,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:27,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 23:57:27,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:27,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 23:57:27,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:57:27,829 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:28,158 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-12-21 23:57:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 23:57:28,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 23:57:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:28,160 INFO L225 Difference]: With dead ends: 84 [2021-12-21 23:57:28,160 INFO L226 Difference]: Without dead ends: 84 [2021-12-21 23:57:28,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-21 23:57:28,161 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 253 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:28,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 99 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-21 23:57:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2021-12-21 23:57:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-21 23:57:28,164 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 13 [2021-12-21 23:57:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:28,164 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-21 23:57:28,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-21 23:57:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 23:57:28,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:28,165 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-21 23:57:28,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:28,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:28,365 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-21 23:57:28,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:28,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059796111] [2021-12-21 23:57:28,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:28,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:28,368 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) [2021-12-21 23:57:28,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 23:57:28,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:28,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:28,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 23:57:28,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:28,450 INFO L387 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 [2021-12-21 23:57:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:28,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:29,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:29,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059796111] [2021-12-21 23:57:29,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059796111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:29,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:29,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 23:57:29,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765353962] [2021-12-21 23:57:29,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:29,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 23:57:29,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 23:57:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-21 23:57:29,559 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:31,639 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2021-12-21 23:57:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 23:57:31,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 23:57:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:31,641 INFO L225 Difference]: With dead ends: 173 [2021-12-21 23:57:31,642 INFO L226 Difference]: Without dead ends: 173 [2021-12-21 23:57:31,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-12-21 23:57:31,642 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 247 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:31,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 376 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 249 Invalid, 0 Unknown, 67 Unchecked, 0.9s Time] [2021-12-21 23:57:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-21 23:57:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 63. [2021-12-21 23:57:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-12-21 23:57:31,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 18 [2021-12-21 23:57:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:31,645 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-12-21 23:57:31,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-12-21 23:57:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 23:57:31,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:31,646 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:31,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:31,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:31,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1194451038, now seen corresponding path program 1 times [2021-12-21 23:57:31,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:31,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047863292] [2021-12-21 23:57:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:31,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:31,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:31,848 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) [2021-12-21 23:57:31,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 23:57:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:31,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:31,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:32,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:32,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047863292] [2021-12-21 23:57:32,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047863292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:32,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:32,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-21 23:57:32,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34228141] [2021-12-21 23:57:32,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:32,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:57:32,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:57:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:32,051 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:32,177 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-12-21 23:57:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 23:57:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 23:57:32,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:32,179 INFO L225 Difference]: With dead ends: 83 [2021-12-21 23:57:32,179 INFO L226 Difference]: Without dead ends: 83 [2021-12-21 23:57:32,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:32,180 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:32,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 102 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-21 23:57:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-12-21 23:57:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-12-21 23:57:32,187 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 19 [2021-12-21 23:57:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:32,188 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-12-21 23:57:32,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-12-21 23:57:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 23:57:32,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:32,189 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:32,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:32,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:32,395 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:32,396 INFO L85 PathProgramCache]: Analyzing trace with hash -393896864, now seen corresponding path program 1 times [2021-12-21 23:57:32,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:32,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894768720] [2021-12-21 23:57:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:32,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:32,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:32,397 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) [2021-12-21 23:57:32,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 23:57:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 23:57:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:32,480 INFO L387 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 [2021-12-21 23:57:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:32,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:33,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:33,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894768720] [2021-12-21 23:57:33,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894768720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:33,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:33,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-21 23:57:33,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825512548] [2021-12-21 23:57:33,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:33,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 23:57:33,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:33,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 23:57:33,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-21 23:57:33,373 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:34,145 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2021-12-21 23:57:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 23:57:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 23:57:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:34,147 INFO L225 Difference]: With dead ends: 115 [2021-12-21 23:57:34,147 INFO L226 Difference]: Without dead ends: 115 [2021-12-21 23:57:34,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:34,147 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 139 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:34,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 129 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 0 Unknown, 20 Unchecked, 0.5s Time] [2021-12-21 23:57:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-21 23:57:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2021-12-21 23:57:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2021-12-21 23:57:34,151 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 19 [2021-12-21 23:57:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:34,151 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2021-12-21 23:57:34,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,151 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2021-12-21 23:57:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 23:57:34,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:34,152 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] [2021-12-21 23:57:34,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:34,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:34,352 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1626723800, now seen corresponding path program 1 times [2021-12-21 23:57:34,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:34,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672243477] [2021-12-21 23:57:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:34,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:34,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:34,354 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) [2021-12-21 23:57:34,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 23:57:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:34,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 23:57:34,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:34,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672243477] [2021-12-21 23:57:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672243477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:34,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:34,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:34,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746382551] [2021-12-21 23:57:34,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:34,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:34,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:34,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:34,550 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:34,572 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2021-12-21 23:57:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 23:57:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:34,576 INFO L225 Difference]: With dead ends: 144 [2021-12-21 23:57:34,576 INFO L226 Difference]: Without dead ends: 139 [2021-12-21 23:57:34,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:34,576 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:34,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-21 23:57:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-21 23:57:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2021-12-21 23:57:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 129 states have (on average 1.2403100775193798) internal successors, (160), 131 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2021-12-21 23:57:34,580 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 20 [2021-12-21 23:57:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:34,581 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2021-12-21 23:57:34,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2021-12-21 23:57:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 23:57:34,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:34,582 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, 1] [2021-12-21 23:57:34,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:34,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:34,790 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash 943948737, now seen corresponding path program 1 times [2021-12-21 23:57:34,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:34,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776451516] [2021-12-21 23:57:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:34,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:34,792 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) [2021-12-21 23:57:34,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 23:57:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:34,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:34,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 23:57:34,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:34,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:34,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776451516] [2021-12-21 23:57:34,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776451516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:34,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:34,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:34,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840847125] [2021-12-21 23:57:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:34,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:34,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:34,982 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:35,003 INFO L93 Difference]: Finished difference Result 168 states and 206 transitions. [2021-12-21 23:57:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:35,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-21 23:57:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:35,009 INFO L225 Difference]: With dead ends: 168 [2021-12-21 23:57:35,009 INFO L226 Difference]: Without dead ends: 163 [2021-12-21 23:57:35,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:35,010 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:35,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-12-21 23:57:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-21 23:57:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2021-12-21 23:57:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 135 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2021-12-21 23:57:35,013 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 22 [2021-12-21 23:57:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:35,013 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2021-12-21 23:57:35,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2021-12-21 23:57:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 23:57:35,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:35,014 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:35,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:35,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:35,215 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1425250584, now seen corresponding path program 1 times [2021-12-21 23:57:35,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:35,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511379747] [2021-12-21 23:57:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:35,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:35,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:35,217 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) [2021-12-21 23:57:35,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-21 23:57:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:35,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:35,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:35,343 INFO L353 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-12-21 23:57:35,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2021-12-21 23:57:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:35,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:35,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:35,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511379747] [2021-12-21 23:57:35,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511379747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:35,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:35,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 23:57:35,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537631321] [2021-12-21 23:57:35,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:35,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:35,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:35,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:35,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:35,386 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:35,491 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2021-12-21 23:57:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-21 23:57:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:35,492 INFO L225 Difference]: With dead ends: 148 [2021-12-21 23:57:35,492 INFO L226 Difference]: Without dead ends: 146 [2021-12-21 23:57:35,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 23:57:35,493 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:35,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2021-12-21 23:57:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-21 23:57:35,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-12-21 23:57:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.2237762237762237) internal successors, (175), 145 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-12-21 23:57:35,497 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 28 [2021-12-21 23:57:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:35,497 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-12-21 23:57:35,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-12-21 23:57:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 23:57:35,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:35,499 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:35,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:35,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:35,711 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:35,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:35,711 INFO L85 PathProgramCache]: Analyzing trace with hash 212486577, now seen corresponding path program 1 times [2021-12-21 23:57:35,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:35,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738837584] [2021-12-21 23:57:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:35,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:35,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:35,712 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) [2021-12-21 23:57:35,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-21 23:57:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:35,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 23:57:35,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:35,864 INFO L353 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-12-21 23:57:35,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2021-12-21 23:57:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:35,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:35,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:35,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738837584] [2021-12-21 23:57:35,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738837584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:35,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:35,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 23:57:35,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526098781] [2021-12-21 23:57:35,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:35,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:35,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:35,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:35,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:35,911 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:36,312 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2021-12-21 23:57:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 23:57:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:36,314 INFO L225 Difference]: With dead ends: 158 [2021-12-21 23:57:36,314 INFO L226 Difference]: Without dead ends: 156 [2021-12-21 23:57:36,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 23:57:36,315 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:36,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2021-12-21 23:57:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-21 23:57:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2021-12-21 23:57:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.2167832167832169) internal successors, (174), 145 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2021-12-21 23:57:36,319 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 30 [2021-12-21 23:57:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:36,319 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2021-12-21 23:57:36,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2021-12-21 23:57:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 23:57:36,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:36,320 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:36,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:36,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:36,529 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -808581777, now seen corresponding path program 1 times [2021-12-21 23:57:36,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:36,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130732284] [2021-12-21 23:57:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:36,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:36,531 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) [2021-12-21 23:57:36,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-21 23:57:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:36,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 23:57:36,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 23:57:36,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:36,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:36,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130732284] [2021-12-21 23:57:36,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130732284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:36,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:36,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:36,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446035044] [2021-12-21 23:57:36,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:36,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:36,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:36,769 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:36,774 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2021-12-21 23:57:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:36,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-21 23:57:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:36,776 INFO L225 Difference]: With dead ends: 145 [2021-12-21 23:57:36,776 INFO L226 Difference]: Without dead ends: 118 [2021-12-21 23:57:36,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:36,776 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:36,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 65 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-21 23:57:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-21 23:57:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-12-21 23:57:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-12-21 23:57:36,779 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 30 [2021-12-21 23:57:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:36,779 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-12-21 23:57:36,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:36,780 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-12-21 23:57:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 23:57:36,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:36,780 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:36,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:36,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:36,988 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:36,988 INFO L85 PathProgramCache]: Analyzing trace with hash -521097088, now seen corresponding path program 2 times [2021-12-21 23:57:36,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:36,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198549447] [2021-12-21 23:57:36,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:36,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:36,990 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) [2021-12-21 23:57:36,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-21 23:57:37,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:37,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:37,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:57:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:37,089 INFO L387 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 [2021-12-21 23:57:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 23:57:37,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:38,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198549447] [2021-12-21 23:57:38,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198549447] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:38,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:38,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-21 23:57:38,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717463470] [2021-12-21 23:57:38,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:38,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 23:57:38,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 23:57:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:38,908 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:39,463 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2021-12-21 23:57:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:57:39,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-21 23:57:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:39,464 INFO L225 Difference]: With dead ends: 107 [2021-12-21 23:57:39,464 INFO L226 Difference]: Without dead ends: 106 [2021-12-21 23:57:39,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-21 23:57:39,465 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:39,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 10 Unchecked, 0.4s Time] [2021-12-21 23:57:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-21 23:57:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2021-12-21 23:57:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2021-12-21 23:57:39,468 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 33 [2021-12-21 23:57:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:39,469 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2021-12-21 23:57:39,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2021-12-21 23:57:39,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 23:57:39,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:39,470 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-21 23:57:39,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:39,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:39,679 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:39,679 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-21 23:57:39,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:39,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154837189] [2021-12-21 23:57:39,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:57:39,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:39,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:39,681 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) [2021-12-21 23:57:39,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-21 23:57:39,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 23:57:39,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:57:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:39,853 INFO L387 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 [2021-12-21 23:57:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:40,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:43,332 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154837189] [2021-12-21 23:57:43,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154837189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:43,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:43,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-12-21 23:57:43,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077908427] [2021-12-21 23:57:43,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:43,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 23:57:43,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 23:57:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-21 23:57:43,334 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:57,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:57,619 INFO L93 Difference]: Finished difference Result 844 states and 985 transitions. [2021-12-21 23:57:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 23:57:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 23:57:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:57,624 INFO L225 Difference]: With dead ends: 844 [2021-12-21 23:57:57,624 INFO L226 Difference]: Without dead ends: 844 [2021-12-21 23:57:57,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=547, Invalid=1259, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 23:57:57,626 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 2020 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2020 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:57,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2020 Valid, 1043 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1061 Invalid, 0 Unknown, 111 Unchecked, 3.3s Time] [2021-12-21 23:57:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-12-21 23:57:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 133. [2021-12-21 23:57:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 131 states have (on average 1.2061068702290076) internal successors, (158), 132 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2021-12-21 23:57:57,632 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 34 [2021-12-21 23:57:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:57,632 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2021-12-21 23:57:57,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2021-12-21 23:57:57,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 23:57:57,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:57,633 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:57,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:57,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:57:57,842 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:57:57,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash -701692519, now seen corresponding path program 1 times [2021-12-21 23:57:57,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:57:57,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677020360] [2021-12-21 23:57:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:57,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:57:57,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:57:57,844 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:57:57,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-21 23:57:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:57:57,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:57,964 INFO L387 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 [2021-12-21 23:57:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:58,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:59,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:57:59,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677020360] [2021-12-21 23:57:59,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677020360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:59,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:57:59,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-21 23:57:59,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913881546] [2021-12-21 23:57:59,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:59,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 23:57:59,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:57:59,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 23:57:59,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:59,724 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:00,229 INFO L93 Difference]: Finished difference Result 138 states and 162 transitions. [2021-12-21 23:58:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:58:00,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-21 23:58:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:00,231 INFO L225 Difference]: With dead ends: 138 [2021-12-21 23:58:00,231 INFO L226 Difference]: Without dead ends: 130 [2021-12-21 23:58:00,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-21 23:58:00,232 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:00,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 114 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2021-12-21 23:58:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-21 23:58:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2021-12-21 23:58:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 125 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 150 transitions. [2021-12-21 23:58:00,235 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 150 transitions. Word has length 35 [2021-12-21 23:58:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:00,235 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 150 transitions. [2021-12-21 23:58:00,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 150 transitions. [2021-12-21 23:58:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 23:58:00,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:00,236 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:00,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-21 23:58:00,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:00,436 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:58:00,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:00,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1227137273, now seen corresponding path program 2 times [2021-12-21 23:58:00,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:00,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760079645] [2021-12-21 23:58:00,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:58:00,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:00,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:00,438 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:00,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-21 23:58:00,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:58:00,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 23:58:00,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:00,526 INFO L387 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 [2021-12-21 23:58:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:01,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:58:02,157 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:02,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760079645] [2021-12-21 23:58:02,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760079645] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:02,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:02,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-21 23:58:02,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11884017] [2021-12-21 23:58:02,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:02,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 23:58:02,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:02,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 23:58:02,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-21 23:58:02,159 INFO L87 Difference]: Start difference. First operand 126 states and 150 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:04,507 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2021-12-21 23:58:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 23:58:04,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-21 23:58:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:04,508 INFO L225 Difference]: With dead ends: 195 [2021-12-21 23:58:04,508 INFO L226 Difference]: Without dead ends: 195 [2021-12-21 23:58:04,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2021-12-21 23:58:04,509 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 296 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:04,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 257 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 241 Invalid, 0 Unknown, 57 Unchecked, 0.7s Time] [2021-12-21 23:58:04,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-21 23:58:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-12-21 23:58:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.1979166666666667) internal successors, (230), 193 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2021-12-21 23:58:04,513 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 35 [2021-12-21 23:58:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:04,513 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2021-12-21 23:58:04,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2021-12-21 23:58:04,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 23:58:04,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:04,515 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:04,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:04,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:04,715 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:58:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:04,716 INFO L85 PathProgramCache]: Analyzing trace with hash -856498489, now seen corresponding path program 3 times [2021-12-21 23:58:04,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:04,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651229601] [2021-12-21 23:58:04,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:58:04,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:04,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:04,717 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:04,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-21 23:58:04,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 23:58:04,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:04,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 23:58:04,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:04,829 INFO L387 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 [2021-12-21 23:58:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 23:58:05,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 23:58:08,147 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651229601] [2021-12-21 23:58:08,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651229601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:08,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:08,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-21 23:58:08,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260735851] [2021-12-21 23:58:08,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:08,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 23:58:08,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 23:58:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-21 23:58:08,149 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:08,298 INFO L93 Difference]: Finished difference Result 283 states and 334 transitions. [2021-12-21 23:58:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:58:08,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-21 23:58:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:08,299 INFO L225 Difference]: With dead ends: 283 [2021-12-21 23:58:08,299 INFO L226 Difference]: Without dead ends: 277 [2021-12-21 23:58:08,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-12-21 23:58:08,300 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:08,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 182 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-12-21 23:58:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-21 23:58:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 270. [2021-12-21 23:58:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 268 states have (on average 1.1977611940298507) internal successors, (321), 269 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 321 transitions. [2021-12-21 23:58:08,305 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 321 transitions. Word has length 63 [2021-12-21 23:58:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:08,306 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 321 transitions. [2021-12-21 23:58:08,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 321 transitions. [2021-12-21 23:58:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 23:58:08,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:08,307 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:08,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-21 23:58:08,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:08,515 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:58:08,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1772212195, now seen corresponding path program 3 times [2021-12-21 23:58:08,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:08,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252823550] [2021-12-21 23:58:08,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:58:08,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:08,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:08,517 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:08,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-21 23:58:08,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 23:58:08,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 23:58:08,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:08,648 INFO L387 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 [2021-12-21 23:58:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 99 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 23:58:10,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 23:58:16,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 23:58:16,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252823550] [2021-12-21 23:58:16,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252823550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:16,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 23:58:16,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-21 23:58:16,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959863897] [2021-12-21 23:58:16,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:16,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 23:58:16,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 23:58:16,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 23:58:16,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-12-21 23:58:16,449 INFO L87 Difference]: Start difference. First operand 270 states and 321 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:17,090 INFO L93 Difference]: Finished difference Result 289 states and 341 transitions. [2021-12-21 23:58:17,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 23:58:17,091 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-21 23:58:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:17,092 INFO L225 Difference]: With dead ends: 289 [2021-12-21 23:58:17,092 INFO L226 Difference]: Without dead ends: 283 [2021-12-21 23:58:17,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-12-21 23:58:17,093 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:17,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 266 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2021-12-21 23:58:17,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-21 23:58:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2021-12-21 23:58:17,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 279 states have (on average 1.1935483870967742) internal successors, (333), 280 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 333 transitions. [2021-12-21 23:58:17,098 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 333 transitions. Word has length 65 [2021-12-21 23:58:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:17,099 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 333 transitions. [2021-12-21 23:58:17,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,099 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 333 transitions. [2021-12-21 23:58:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 23:58:17,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:17,100 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-12-21 23:58:17,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-21 23:58:17,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 23:58:17,307 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-21 23:58:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-12-21 23:58:17,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 23:58:17,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470844800] [2021-12-21 23:58:17,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 23:58:17,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 23:58:17,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 23:58:17,310 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 23:58:17,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-21 23:58:17,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 23:58:17,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 23:58:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:17,448 INFO L387 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 [2021-12-21 23:58:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:19,034 INFO L328 TraceCheckSpWp]: Computing backward predicates...