./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/array02-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:45:22,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:45:22,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:45:22,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:45:22,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:45:22,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:45:22,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:45:22,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:45:22,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:45:22,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:45:22,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:45:22,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:45:22,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:45:22,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:45:22,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:45:22,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:45:22,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:45:22,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:45:22,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:45:22,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:45:22,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:45:22,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:45:22,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:45:22,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:45:22,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:45:22,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:45:22,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:45:22,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:45:22,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:45:22,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:45:22,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:45:22,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:45:22,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:45:22,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:45:22,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:45:22,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:45:22,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:45:22,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:45:22,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:45:22,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:45:22,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:45:22,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:45:22,722 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:45:22,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:45:22,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:45:22,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:45:22,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:45:22,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:45:22,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:45:22,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:45:22,728 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:45:22,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:45:22,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:45:22,730 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:45:22,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:45:22,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:45:22,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:45:22,730 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:45:22,730 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:45:22,730 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:45:22,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:45:22,731 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:45:22,731 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:45:22,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:45:22,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:45:22,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:45:22,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:45:22,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:45:22,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:45:22,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:45:22,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:45:22,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:45:22,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:45:22,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-12-16 05:45:22,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:45:22,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:45:22,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:45:22,957 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:45:22,957 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:45:22,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-16 05:45:23,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ef2267d/1a4aa6d9cbdd45988b8e18acbb796e94/FLAG8cfb28015 [2021-12-16 05:45:23,456 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:45:23,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-16 05:45:23,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ef2267d/1a4aa6d9cbdd45988b8e18acbb796e94/FLAG8cfb28015 [2021-12-16 05:45:23,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75ef2267d/1a4aa6d9cbdd45988b8e18acbb796e94 [2021-12-16 05:45:23,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:45:23,483 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:45:23,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:45:23,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:45:23,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:45:23,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:45:23" (1/1) ... [2021-12-16 05:45:23,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49aec64a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:23, skipping insertion in model container [2021-12-16 05:45:23,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:45:23" (1/1) ... [2021-12-16 05:45:23,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:45:23,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:45:23,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:45:23,773 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) [2021-12-16 05:45:23,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15ffcf9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:23, skipping insertion in model container [2021-12-16 05:45:23,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:45:23,775 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-16 05:45:23,777 INFO L158 Benchmark]: Toolchain (without parser) took 293.46ms. Allocated memory is still 83.9MB. Free memory was 50.9MB in the beginning and 59.3MB in the end (delta: -8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-16 05:45:23,778 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 41.0MB in the beginning and 41.0MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 05:45:23,779 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.21ms. Allocated memory is still 83.9MB. Free memory was 50.6MB in the beginning and 59.6MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-16 05:45:23,780 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory was 41.0MB in the beginning and 41.0MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 289.21ms. Allocated memory is still 83.9MB. Free memory was 50.6MB in the beginning and 59.6MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 533]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:45:25,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:45:25,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:45:25,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:45:25,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:45:25,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:45:25,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:45:25,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:45:25,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:45:25,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:45:25,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:45:25,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:45:25,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:45:25,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:45:25,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:45:25,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:45:25,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:45:25,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:45:25,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:45:25,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:45:25,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:45:25,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:45:25,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:45:25,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:45:25,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:45:25,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:45:25,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:45:25,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:45:25,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:45:25,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:45:25,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:45:25,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:45:25,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:45:25,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:45:25,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:45:25,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:45:25,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:45:25,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:45:25,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:45:25,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:45:25,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:45:25,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 05:45:25,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:45:25,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:45:25,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:45:25,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:45:25,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:45:25,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:45:25,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:45:25,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:45:25,413 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:45:25,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:45:25,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:45:25,414 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:45:25,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:45:25,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:45:25,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:45:25,414 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:45:25,414 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:45:25,414 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:45:25,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:45:25,415 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:45:25,415 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 05:45:25,415 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 05:45:25,415 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:45:25,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:45:25,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:45:25,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:45:25,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:45:25,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:45:25,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:45:25,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:45:25,416 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 05:45:25,416 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 05:45:25,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:45:25,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 05:45:25,417 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-12-16 05:45:25,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:45:25,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:45:25,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:45:25,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:45:25,704 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:45:25,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-16 05:45:25,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d53aec4c/d0f72554065f4882972918bebbcda54a/FLAG5e117c49f [2021-12-16 05:45:26,192 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:45:26,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-12-16 05:45:26,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d53aec4c/d0f72554065f4882972918bebbcda54a/FLAG5e117c49f [2021-12-16 05:45:26,211 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d53aec4c/d0f72554065f4882972918bebbcda54a [2021-12-16 05:45:26,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:45:26,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:45:26,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:45:26,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:45:26,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:45:26,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26, skipping insertion in model container [2021-12-16 05:45:26,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:45:26,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:45:26,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:45:26,526 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-16 05:45:26,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:45:26,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:45:26,571 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:45:26,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:45:26,631 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:45:26,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26 WrapperNode [2021-12-16 05:45:26,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:45:26,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:45:26,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:45:26,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:45:26,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,684 INFO L137 Inliner]: procedures = 117, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-12-16 05:45:26,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:45:26,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:45:26,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:45:26,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:45:26,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:45:26,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:45:26,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:45:26,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:45:26,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (1/1) ... [2021-12-16 05:45:26,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:45:26,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:45:26,744 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) [2021-12-16 05:45:26,778 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 [2021-12-16 05:45:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 05:45:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:45:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:45:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 05:45:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:45:26,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:45:26,869 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:45:26,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:45:27,152 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:45:27,156 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:45:27,157 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 05:45:27,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:45:27 BoogieIcfgContainer [2021-12-16 05:45:27,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:45:27,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:45:27,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:45:27,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:45:27,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:45:26" (1/3) ... [2021-12-16 05:45:27,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3ea402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:45:27, skipping insertion in model container [2021-12-16 05:45:27,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:45:26" (2/3) ... [2021-12-16 05:45:27,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3ea402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:45:27, skipping insertion in model container [2021-12-16 05:45:27,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:45:27" (3/3) ... [2021-12-16 05:45:27,167 INFO L111 eAbstractionObserver]: Analyzing ICFG array02-alloca-2.i [2021-12-16 05:45:27,171 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:45:27,171 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-16 05:45:27,220 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:45:27,226 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 [2021-12-16 05:45:27,226 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-16 05:45:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:45:27,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:27,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:45:27,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-12-16 05:45:27,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:27,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428665834] [2021-12-16 05:45:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:27,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:27,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:27,259 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) [2021-12-16 05:45:27,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 05:45:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:27,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:45:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:27,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:45:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:27,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:27,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428665834] [2021-12-16 05:45:27,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428665834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:27,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:27,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:45:27,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424577170] [2021-12-16 05:45:27,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:27,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:45:27,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:27,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:45:27,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:45:27,422 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:27,511 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-12-16 05:45:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:45:27,513 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 [2021-12-16 05:45:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:27,517 INFO L225 Difference]: With dead ends: 41 [2021-12-16 05:45:27,518 INFO L226 Difference]: Without dead ends: 39 [2021-12-16 05:45:27,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:45:27,521 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:27,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:45:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-16 05:45:27,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-16 05:45:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-16 05:45:27,544 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 6 [2021-12-16 05:45:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:27,544 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-16 05:45:27,544 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) [2021-12-16 05:45:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-16 05:45:27,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:45:27,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:27,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:45:27,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-16 05:45:27,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:27,746 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:27,747 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-12-16 05:45:27,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200366597] [2021-12-16 05:45:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:27,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:27,749 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) [2021-12-16 05:45:27,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 05:45:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 05:45:27,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:27,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:45:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:27,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:27,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:27,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200366597] [2021-12-16 05:45:27,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200366597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:27,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:27,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:45:27,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188842135] [2021-12-16 05:45:27,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:27,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:45:27,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:45:27,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:45:27,834 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:28,010 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-16 05:45:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:45:28,011 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 [2021-12-16 05:45:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:28,012 INFO L225 Difference]: With dead ends: 79 [2021-12-16 05:45:28,012 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 05:45:28,012 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 [2021-12-16 05:45:28,013 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:28,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:45:28,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 05:45:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2021-12-16 05:45:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-16 05:45:28,017 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 6 [2021-12-16 05:45:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:28,018 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-16 05:45:28,018 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) [2021-12-16 05:45:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-16 05:45:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 05:45:28,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:28,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 05:45:28,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:28,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:28,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:28,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-12-16 05:45:28,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:28,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780180949] [2021-12-16 05:45:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:28,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:28,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:28,231 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) [2021-12-16 05:45:28,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 05:45:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:28,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:45:28,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:28,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:45:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:28,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:28,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:28,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780180949] [2021-12-16 05:45:28,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780180949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:28,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:28,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:45:28,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829383665] [2021-12-16 05:45:28,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:45:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:45:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:45:28,370 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:28,406 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-16 05:45:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:45:28,407 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 [2021-12-16 05:45:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:28,408 INFO L225 Difference]: With dead ends: 44 [2021-12-16 05:45:28,408 INFO L226 Difference]: Without dead ends: 44 [2021-12-16 05:45:28,408 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 [2021-12-16 05:45:28,409 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:28,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-16 05:45:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-16 05:45:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-16 05:45:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-16 05:45:28,413 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-12-16 05:45:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:28,413 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-16 05:45:28,413 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) [2021-12-16 05:45:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-16 05:45:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 05:45:28,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:28,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:28,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-16 05:45:28,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:28,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:28,621 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-12-16 05:45:28,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:28,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032352501] [2021-12-16 05:45:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:28,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:28,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:28,623 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) [2021-12-16 05:45:28,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 05:45:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:28,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:45:28,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:28,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:45:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:28,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:28,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:28,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032352501] [2021-12-16 05:45:28,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032352501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:28,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:28,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:45:28,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827514805] [2021-12-16 05:45:28,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:28,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:45:28,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:28,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:45:28,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:45:28,688 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:28,796 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-16 05:45:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:45:28,796 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 [2021-12-16 05:45:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:28,797 INFO L225 Difference]: With dead ends: 37 [2021-12-16 05:45:28,797 INFO L226 Difference]: Without dead ends: 37 [2021-12-16 05:45:28,797 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 [2021-12-16 05:45:28,799 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:28,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:45:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-16 05:45:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-16 05:45:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-12-16 05:45:28,809 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2021-12-16 05:45:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:28,809 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-12-16 05:45:28,809 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) [2021-12-16 05:45:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-12-16 05:45:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 05:45:28,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:28,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:28,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:29,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:29,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-12-16 05:45:29,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:29,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021488131] [2021-12-16 05:45:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:29,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:29,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:29,019 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) [2021-12-16 05:45:29,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 05:45:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 05:45:29,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:29,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:45:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:29,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:29,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:29,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021488131] [2021-12-16 05:45:29,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021488131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:29,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:29,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:45:29,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467298835] [2021-12-16 05:45:29,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:29,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:45:29,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:45:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:45:29,210 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:29,242 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-12-16 05:45:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:45:29,242 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 [2021-12-16 05:45:29,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:29,243 INFO L225 Difference]: With dead ends: 40 [2021-12-16 05:45:29,244 INFO L226 Difference]: Without dead ends: 40 [2021-12-16 05:45:29,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:45:29,245 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:29,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2021-12-16 05:45:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-16 05:45:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-16 05:45:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.4375) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-12-16 05:45:29,248 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 8 [2021-12-16 05:45:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:29,249 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-12-16 05:45:29,249 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) [2021-12-16 05:45:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-12-16 05:45:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 05:45:29,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:29,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:29,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:29,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:29,456 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:29,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052306, now seen corresponding path program 1 times [2021-12-16 05:45:29,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:29,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169529097] [2021-12-16 05:45:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:29,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:29,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:29,458 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) [2021-12-16 05:45:29,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 05:45:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:29,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:45:29,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:29,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:29,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:29,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169529097] [2021-12-16 05:45:29,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169529097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:29,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:29,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:45:29,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984445170] [2021-12-16 05:45:29,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:29,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:45:29,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:45:29,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:45:29,528 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:29,559 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-16 05:45:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:45:29,563 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 [2021-12-16 05:45:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:29,563 INFO L225 Difference]: With dead ends: 39 [2021-12-16 05:45:29,564 INFO L226 Difference]: Without dead ends: 39 [2021-12-16 05:45:29,564 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 [2021-12-16 05:45:29,564 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:29,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:45:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-16 05:45:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-12-16 05:45:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-16 05:45:29,567 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 9 [2021-12-16 05:45:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:29,567 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-16 05:45:29,568 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) [2021-12-16 05:45:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-16 05:45:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 05:45:29,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:29,568 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:29,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:29,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:29,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-12-16 05:45:29,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482349391] [2021-12-16 05:45:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:29,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:29,778 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) [2021-12-16 05:45:29,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 05:45:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 05:45:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:29,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:29,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482349391] [2021-12-16 05:45:29,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482349391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:45:29,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:45:29,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 05:45:29,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976375109] [2021-12-16 05:45:29,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:45:29,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:45:29,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:45:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:45:29,924 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:29,971 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-16 05:45:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:45:29,975 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 [2021-12-16 05:45:29,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:29,975 INFO L225 Difference]: With dead ends: 65 [2021-12-16 05:45:29,975 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 05:45:29,975 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 [2021-12-16 05:45:29,976 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:29,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:45:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 05:45:29,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-12-16 05:45:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-16 05:45:29,978 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 10 [2021-12-16 05:45:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:29,979 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-16 05:45:29,979 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) [2021-12-16 05:45:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-16 05:45:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 05:45:29,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:29,979 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:29,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:30,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:30,183 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-12-16 05:45:30,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:30,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671070980] [2021-12-16 05:45:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:30,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:30,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:30,224 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) [2021-12-16 05:45:30,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 05:45:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:30,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 05:45:30,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:30,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:45:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:30,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:30,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:30,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671070980] [2021-12-16 05:45:30,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671070980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:45:30,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:45:30,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-16 05:45:30,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892446300] [2021-12-16 05:45:30,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:45:30,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:45:30,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:30,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:45:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:45:30,773 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:31,175 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-12-16 05:45:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:45:31,176 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 [2021-12-16 05:45:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:31,177 INFO L225 Difference]: With dead ends: 73 [2021-12-16 05:45:31,177 INFO L226 Difference]: Without dead ends: 73 [2021-12-16 05:45:31,178 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 [2021-12-16 05:45:31,178 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 152 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:31,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 88 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2021-12-16 05:45:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-16 05:45:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-12-16 05:45:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-16 05:45:31,181 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 10 [2021-12-16 05:45:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:31,182 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-16 05:45:31,182 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) [2021-12-16 05:45:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-16 05:45:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:45:31,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:31,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:31,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-16 05:45:31,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:31,389 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2021-12-16 05:45:31,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:31,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3752944] [2021-12-16 05:45:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:31,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:31,391 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) [2021-12-16 05:45:31,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-16 05:45:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:31,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:45:31,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:31,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 05:45:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:45:31,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:31,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:31,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3752944] [2021-12-16 05:45:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3752944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:31,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:31,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:45:31,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088266074] [2021-12-16 05:45:31,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:31,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:45:31,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:45:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:45:31,497 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:31,735 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-12-16 05:45:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:45:31,735 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 [2021-12-16 05:45:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:31,736 INFO L225 Difference]: With dead ends: 90 [2021-12-16 05:45:31,736 INFO L226 Difference]: Without dead ends: 90 [2021-12-16 05:45:31,736 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 [2021-12-16 05:45:31,737 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:31,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:45:31,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-16 05:45:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-12-16 05:45:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.309090909090909) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-12-16 05:45:31,742 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 12 [2021-12-16 05:45:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:31,742 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-12-16 05:45:31,742 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) [2021-12-16 05:45:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-12-16 05:45:31,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 05:45:31,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:31,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:31,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:31,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:31,955 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2021-12-16 05:45:31,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187540573] [2021-12-16 05:45:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:31,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:31,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:31,957 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) [2021-12-16 05:45:31,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 05:45:31,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:31,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:45:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:45:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:32,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:32,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:32,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187540573] [2021-12-16 05:45:32,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187540573] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 05:45:32,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 05:45:32,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-16 05:45:32,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546485225] [2021-12-16 05:45:32,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:32,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:45:32,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:32,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:45:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:45:32,402 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:32,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:32,604 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-16 05:45:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:45:32,605 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 [2021-12-16 05:45:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:32,605 INFO L225 Difference]: With dead ends: 63 [2021-12-16 05:45:32,605 INFO L226 Difference]: Without dead ends: 63 [2021-12-16 05:45:32,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:45:32,606 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:32,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 35 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:45:32,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-16 05:45:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-12-16 05:45:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-16 05:45:32,609 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2021-12-16 05:45:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:32,609 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-16 05:45:32,609 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) [2021-12-16 05:45:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-16 05:45:32,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:45:32,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:32,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:32,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-16 05:45:32,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:32,817 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash 363893421, now seen corresponding path program 1 times [2021-12-16 05:45:32,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:32,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125155649] [2021-12-16 05:45:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:32,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:32,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:32,818 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) [2021-12-16 05:45:32,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-16 05:45:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:32,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 05:45:32,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:45:32,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:32,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125155649] [2021-12-16 05:45:32,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125155649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:32,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:32,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:45:32,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960731798] [2021-12-16 05:45:32,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:32,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:45:32,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:45:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:45:32,881 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:32,989 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-12-16 05:45:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:45:32,990 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 [2021-12-16 05:45:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:32,990 INFO L225 Difference]: With dead ends: 80 [2021-12-16 05:45:32,990 INFO L226 Difference]: Without dead ends: 80 [2021-12-16 05:45:32,991 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 [2021-12-16 05:45:32,991 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:32,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:45:32,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-16 05:45:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-12-16 05:45:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-16 05:45:32,993 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2021-12-16 05:45:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:32,994 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-16 05:45:32,994 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) [2021-12-16 05:45:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-16 05:45:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:45:32,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:32,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:33,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:33,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:33,200 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1064957999, now seen corresponding path program 1 times [2021-12-16 05:45:33,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:33,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558031329] [2021-12-16 05:45:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:33,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:33,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:33,202 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) [2021-12-16 05:45:33,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 05:45:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:33,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 05:45:33,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:33,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:33,415 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:33,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558031329] [2021-12-16 05:45:33,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558031329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:45:33,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:45:33,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-12-16 05:45:33,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367473476] [2021-12-16 05:45:33,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:45:33,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:45:33,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:45:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:45:33,416 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:33,657 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-12-16 05:45:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:45:33,658 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 [2021-12-16 05:45:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:33,658 INFO L225 Difference]: With dead ends: 82 [2021-12-16 05:45:33,658 INFO L226 Difference]: Without dead ends: 82 [2021-12-16 05:45:33,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:45:33,659 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:33,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 95 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:45:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-16 05:45:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2021-12-16 05:45:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-16 05:45:33,661 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 13 [2021-12-16 05:45:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:33,661 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-16 05:45:33,662 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) [2021-12-16 05:45:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-16 05:45:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:45:33,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:33,662 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:33,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:33,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:33,863 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:33,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:33,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2110205631, now seen corresponding path program 1 times [2021-12-16 05:45:33,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:33,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152738845] [2021-12-16 05:45:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:33,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:33,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:33,864 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) [2021-12-16 05:45:33,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-16 05:45:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:45:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:45:33,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:45:34,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:34,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152738845] [2021-12-16 05:45:34,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152738845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:45:34,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:45:34,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 05:45:34,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005520870] [2021-12-16 05:45:34,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:45:34,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:45:34,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:45:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:45:34,026 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:34,098 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-12-16 05:45:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:45:34,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-16 05:45:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:34,099 INFO L225 Difference]: With dead ends: 65 [2021-12-16 05:45:34,099 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 05:45:34,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:45:34,100 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:34,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:45:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 05:45:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-12-16 05:45:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-12-16 05:45:34,102 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 18 [2021-12-16 05:45:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:34,102 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-12-16 05:45:34,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-12-16 05:45:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:45:34,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:34,103 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-12-16 05:45:34,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:34,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:34,307 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-12-16 05:45:34,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:34,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992012680] [2021-12-16 05:45:34,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:45:34,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:34,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:34,309 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) [2021-12-16 05:45:34,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 05:45:34,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:45:34,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:45:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 05:45:34,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:34,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:45:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:34,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:35,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:35,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992012680] [2021-12-16 05:45:35,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992012680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:45:35,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:45:35,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-16 05:45:35,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925869592] [2021-12-16 05:45:35,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:45:35,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 05:45:35,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:35,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 05:45:35,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-16 05:45:35,340 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:37,151 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2021-12-16 05:45:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 05:45:37,153 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 [2021-12-16 05:45:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:37,154 INFO L225 Difference]: With dead ends: 183 [2021-12-16 05:45:37,154 INFO L226 Difference]: Without dead ends: 183 [2021-12-16 05:45:37,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:45:37,155 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 395 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:37,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 338 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 271 Invalid, 0 Unknown, 48 Unchecked, 0.9s Time] [2021-12-16 05:45:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-16 05:45:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 78. [2021-12-16 05:45:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.2) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-12-16 05:45:37,157 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 18 [2021-12-16 05:45:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:37,158 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-12-16 05:45:37,158 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) [2021-12-16 05:45:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-12-16 05:45:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-16 05:45:37,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:37,158 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:37,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:37,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:37,371 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1163693311, now seen corresponding path program 1 times [2021-12-16 05:45:37,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:37,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37985928] [2021-12-16 05:45:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:37,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:37,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:37,373 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) [2021-12-16 05:45:37,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-16 05:45:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:37,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 05:45:37,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:37,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:45:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:45:37,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:45:38,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37985928] [2021-12-16 05:45:38,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37985928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:45:38,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:45:38,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-12-16 05:45:38,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820079107] [2021-12-16 05:45:38,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:45:38,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:45:38,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:38,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:45:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:45:38,153 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:38,713 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2021-12-16 05:45:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:45:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-16 05:45:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:38,716 INFO L225 Difference]: With dead ends: 114 [2021-12-16 05:45:38,716 INFO L226 Difference]: Without dead ends: 114 [2021-12-16 05:45:38,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:45:38,716 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:38,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 114 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2021-12-16 05:45:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-16 05:45:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2021-12-16 05:45:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 103 states have (on average 1.203883495145631) internal successors, (124), 105 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-12-16 05:45:38,724 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 18 [2021-12-16 05:45:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:38,724 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-12-16 05:45:38,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-12-16 05:45:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 05:45:38,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:38,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:38,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:38,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:38,927 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:38,928 INFO L85 PathProgramCache]: Analyzing trace with hash -991865623, now seen corresponding path program 1 times [2021-12-16 05:45:38,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:38,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635782509] [2021-12-16 05:45:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:38,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:38,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:38,929 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) [2021-12-16 05:45:38,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 05:45:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:38,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:45:38,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:45:41,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:41,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:41,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635782509] [2021-12-16 05:45:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635782509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:41,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:41,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:45:41,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585974597] [2021-12-16 05:45:41,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:41,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:45:41,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:45:41,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-16 05:45:41,125 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:41,173 INFO L93 Difference]: Finished difference Result 142 states and 170 transitions. [2021-12-16 05:45:41,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:45:41,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 05:45:41,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:41,174 INFO L225 Difference]: With dead ends: 142 [2021-12-16 05:45:41,174 INFO L226 Difference]: Without dead ends: 138 [2021-12-16 05:45:41,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-16 05:45:41,175 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:41,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 75 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-12-16 05:45:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-16 05:45:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2021-12-16 05:45:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 128 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-12-16 05:45:41,185 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 19 [2021-12-16 05:45:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:41,185 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-12-16 05:45:41,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-12-16 05:45:41,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:45:41,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:41,186 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:41,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:41,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:41,393 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:41,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1147657014, now seen corresponding path program 1 times [2021-12-16 05:45:41,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:41,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492302329] [2021-12-16 05:45:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:41,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:41,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:41,395 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) [2021-12-16 05:45:41,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 05:45:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:41,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:45:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:45:43,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:43,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:43,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492302329] [2021-12-16 05:45:43,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492302329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:43,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:43,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:45:43,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843795741] [2021-12-16 05:45:43,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:43,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:45:43,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:43,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:45:43,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-16 05:45:43,633 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:43,644 INFO L93 Difference]: Finished difference Result 173 states and 207 transitions. [2021-12-16 05:45:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:45:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 05:45:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:43,645 INFO L225 Difference]: With dead ends: 173 [2021-12-16 05:45:43,645 INFO L226 Difference]: Without dead ends: 161 [2021-12-16 05:45:43,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-16 05:45:43,646 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:43,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-16 05:45:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-16 05:45:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2021-12-16 05:45:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 138 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2021-12-16 05:45:43,649 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 25 [2021-12-16 05:45:43,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:43,649 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2021-12-16 05:45:43,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2021-12-16 05:45:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:45:43,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:43,650 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:43,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-16 05:45:43,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:43,855 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash 989408118, now seen corresponding path program 1 times [2021-12-16 05:45:43,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:43,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500414277] [2021-12-16 05:45:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:43,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:43,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:43,857 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) [2021-12-16 05:45:43,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-16 05:45:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:43,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:45:43,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:45:46,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:46,055 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:46,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500414277] [2021-12-16 05:45:46,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500414277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:46,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:46,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:45:46,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940350762] [2021-12-16 05:45:46,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:46,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:45:46,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:46,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:45:46,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-16 05:45:46,056 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:46,070 INFO L93 Difference]: Finished difference Result 195 states and 234 transitions. [2021-12-16 05:45:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:45:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 05:45:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:46,079 INFO L225 Difference]: With dead ends: 195 [2021-12-16 05:45:46,079 INFO L226 Difference]: Without dead ends: 191 [2021-12-16 05:45:46,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-16 05:45:46,080 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:46,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-12-16 05:45:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-16 05:45:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2021-12-16 05:45:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 180 states have (on average 1.2222222222222223) internal successors, (220), 182 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-12-16 05:45:46,083 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 25 [2021-12-16 05:45:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:46,085 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-12-16 05:45:46,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-12-16 05:45:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 05:45:46,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:46,089 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:46,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:46,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:46,314 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2063932537, now seen corresponding path program 2 times [2021-12-16 05:45:46,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:46,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99175170] [2021-12-16 05:45:46,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:45:46,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:46,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:46,316 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) [2021-12-16 05:45:46,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 05:45:46,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:45:46,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:45:46,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 05:45:46,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:46,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:45:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 05:45:46,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:47,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99175170] [2021-12-16 05:45:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99175170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:45:47,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:45:47,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-16 05:45:47,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691515962] [2021-12-16 05:45:47,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:45:47,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 05:45:47,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 05:45:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-16 05:45:47,931 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:48,473 INFO L93 Difference]: Finished difference Result 203 states and 241 transitions. [2021-12-16 05:45:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:45:48,474 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-16 05:45:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:48,475 INFO L225 Difference]: With dead ends: 203 [2021-12-16 05:45:48,475 INFO L226 Difference]: Without dead ends: 200 [2021-12-16 05:45:48,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-12-16 05:45:48,475 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:48,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 167 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2021-12-16 05:45:48,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-16 05:45:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2021-12-16 05:45:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 186 states have (on average 1.2204301075268817) internal successors, (227), 188 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 227 transitions. [2021-12-16 05:45:48,478 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 227 transitions. Word has length 30 [2021-12-16 05:45:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:48,478 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 227 transitions. [2021-12-16 05:45:48,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 227 transitions. [2021-12-16 05:45:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 05:45:48,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:48,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:45:48,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:48,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:48,688 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash 630576131, now seen corresponding path program 1 times [2021-12-16 05:45:48,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085834775] [2021-12-16 05:45:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:45:48,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:48,690 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) [2021-12-16 05:45:48,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-16 05:45:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:45:48,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 05:45:48,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:48,953 INFO L354 Elim1Store]: treesize reduction 442, result has 12.5 percent of original size [2021-12-16 05:45:48,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 260 treesize of output 93 [2021-12-16 05:45:49,203 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-12-16 05:45:49,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 68 [2021-12-16 05:45:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:45:49,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:45:49,266 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085834775] [2021-12-16 05:45:49,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085834775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:45:49,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:45:49,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 05:45:49,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567252450] [2021-12-16 05:45:49,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:45:49,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:45:49,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:45:49,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:45:49,268 INFO L87 Difference]: Start difference. First operand 189 states and 227 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:45:49,405 INFO L93 Difference]: Finished difference Result 187 states and 223 transitions. [2021-12-16 05:45:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:45:49,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-16 05:45:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:45:49,406 INFO L225 Difference]: With dead ends: 187 [2021-12-16 05:45:49,406 INFO L226 Difference]: Without dead ends: 169 [2021-12-16 05:45:49,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:45:49,407 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:45:49,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 101 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-12-16 05:45:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-16 05:45:49,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-16 05:45:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 1.2289156626506024) internal successors, (204), 168 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 204 transitions. [2021-12-16 05:45:49,410 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 204 transitions. Word has length 31 [2021-12-16 05:45:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:45:49,410 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 204 transitions. [2021-12-16 05:45:49,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:45:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 204 transitions. [2021-12-16 05:45:49,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 05:45:49,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:45:49,411 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-12-16 05:45:49,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-16 05:45:49,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:45:49,623 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:45:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:45:49,623 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-12-16 05:45:49,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:45:49,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689643024] [2021-12-16 05:45:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:45:49,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:45:49,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:45:49,624 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) [2021-12-16 05:45:49,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-16 05:45:49,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-16 05:45:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:45:49,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 05:45:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:45:49,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:45:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:50,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:45:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:45:51,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:45:51,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689643024] [2021-12-16 05:45:51,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689643024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:45:51,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:45:51,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-16 05:45:51,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054450225] [2021-12-16 05:45:51,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:45:51,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 05:45:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:45:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 05:45:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:45:51,960 INFO L87 Difference]: Start difference. First operand 169 states and 204 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:00,540 INFO L93 Difference]: Finished difference Result 1844 states and 2231 transitions. [2021-12-16 05:46:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-16 05:46:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 05:46:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:00,545 INFO L225 Difference]: With dead ends: 1844 [2021-12-16 05:46:00,545 INFO L226 Difference]: Without dead ends: 1844 [2021-12-16 05:46:00,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-12-16 05:46:00,546 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1633 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:00,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 1101 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 883 Invalid, 0 Unknown, 101 Unchecked, 2.8s Time] [2021-12-16 05:46:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-16 05:46:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 201. [2021-12-16 05:46:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 198 states have (on average 1.2323232323232323) internal successors, (244), 200 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 244 transitions. [2021-12-16 05:46:00,555 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 244 transitions. Word has length 34 [2021-12-16 05:46:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:00,556 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 244 transitions. [2021-12-16 05:46:00,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:00,556 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 244 transitions. [2021-12-16 05:46:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 05:46:00,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:00,556 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:00,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:00,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:46:00,763 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:46:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:00,764 INFO L85 PathProgramCache]: Analyzing trace with hash 913185738, now seen corresponding path program 3 times [2021-12-16 05:46:00,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:46:00,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008426354] [2021-12-16 05:46:00,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:46:00,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:46:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:46:00,765 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) [2021-12-16 05:46:00,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-16 05:46:00,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 05:46:00,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:46:00,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 05:46:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:00,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:46:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-12-16 05:46:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:01,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:02,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:46:02,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008426354] [2021-12-16 05:46:02,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008426354] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:02,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:46:02,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-12-16 05:46:02,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099868961] [2021-12-16 05:46:02,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:02,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 05:46:02,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:46:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 05:46:02,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:46:02,967 INFO L87 Difference]: Start difference. First operand 201 states and 244 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:06,907 INFO L93 Difference]: Finished difference Result 391 states and 463 transitions. [2021-12-16 05:46:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:46:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-16 05:46:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:06,911 INFO L225 Difference]: With dead ends: 391 [2021-12-16 05:46:06,911 INFO L226 Difference]: Without dead ends: 367 [2021-12-16 05:46:06,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-12-16 05:46:06,912 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 196 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:06,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 470 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 331 Invalid, 0 Unknown, 145 Unchecked, 2.8s Time] [2021-12-16 05:46:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-16 05:46:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 253. [2021-12-16 05:46:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 250 states have (on average 1.212) internal successors, (303), 252 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2021-12-16 05:46:06,915 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 34 [2021-12-16 05:46:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:06,916 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2021-12-16 05:46:06,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2021-12-16 05:46:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 05:46:06,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:06,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:06,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:07,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:46:07,127 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:46:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1523871233, now seen corresponding path program 1 times [2021-12-16 05:46:07,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:46:07,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219796026] [2021-12-16 05:46:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:07,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:46:07,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:46:07,129 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) [2021-12-16 05:46:07,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-16 05:46:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:07,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 05:46:07,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:46:07,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:46:07,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:46:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219796026] [2021-12-16 05:46:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219796026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:07,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:46:07,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-16 05:46:07,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146808780] [2021-12-16 05:46:07,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:07,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:46:07,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:46:07,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:46:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:46:07,534 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:07,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:07,780 INFO L93 Difference]: Finished difference Result 231 states and 277 transitions. [2021-12-16 05:46:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:46:07,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-16 05:46:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:07,782 INFO L225 Difference]: With dead ends: 231 [2021-12-16 05:46:07,782 INFO L226 Difference]: Without dead ends: 207 [2021-12-16 05:46:07,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:46:07,782 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:07,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 160 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:46:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-16 05:46:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-12-16 05:46:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 204 states have (on average 1.2303921568627452) internal successors, (251), 206 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 251 transitions. [2021-12-16 05:46:07,785 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 251 transitions. Word has length 37 [2021-12-16 05:46:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:07,785 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 251 transitions. [2021-12-16 05:46:07,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 251 transitions. [2021-12-16 05:46:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 05:46:07,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:07,786 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:07,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:07,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:46:07,993 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:46:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:07,993 INFO L85 PathProgramCache]: Analyzing trace with hash 255163021, now seen corresponding path program 4 times [2021-12-16 05:46:07,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:46:07,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029096497] [2021-12-16 05:46:07,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:46:07,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:46:07,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:46:07,995 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) [2021-12-16 05:46:07,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-16 05:46:08,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:46:08,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:46:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 05:46:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:08,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:46:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:46:08,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 05:46:10,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:46:10,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029096497] [2021-12-16 05:46:10,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029096497] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:10,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:46:10,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-16 05:46:10,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411077037] [2021-12-16 05:46:10,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:10,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 05:46:10,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:46:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 05:46:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-12-16 05:46:10,591 INFO L87 Difference]: Start difference. First operand 207 states and 251 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:13,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 05:46:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:14,954 INFO L93 Difference]: Finished difference Result 419 states and 503 transitions. [2021-12-16 05:46:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:46:14,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-16 05:46:14,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:14,955 INFO L225 Difference]: With dead ends: 419 [2021-12-16 05:46:14,955 INFO L226 Difference]: Without dead ends: 419 [2021-12-16 05:46:14,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 05:46:14,956 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 417 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:14,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 291 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 262 Invalid, 0 Unknown, 42 Unchecked, 2.5s Time] [2021-12-16 05:46:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-16 05:46:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 399. [2021-12-16 05:46:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 396 states have (on average 1.22979797979798) internal successors, (487), 398 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 487 transitions. [2021-12-16 05:46:14,961 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 487 transitions. Word has length 38 [2021-12-16 05:46:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:14,961 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 487 transitions. [2021-12-16 05:46:14,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 487 transitions. [2021-12-16 05:46:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 05:46:14,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:14,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:14,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:15,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:46:15,169 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:46:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash 599848030, now seen corresponding path program 2 times [2021-12-16 05:46:15,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:46:15,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944870873] [2021-12-16 05:46:15,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:46:15,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:46:15,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:46:15,171 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) [2021-12-16 05:46:15,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-16 05:46:15,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-16 05:46:15,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:46:15,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 05:46:15,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-16 05:46:17,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 05:46:17,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:46:17,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944870873] [2021-12-16 05:46:17,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944870873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:46:17,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:46:17,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:46:17,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817496865] [2021-12-16 05:46:17,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:46:17,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:46:17,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:46:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:46:17,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-16 05:46:17,402 INFO L87 Difference]: Start difference. First operand 399 states and 487 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:17,406 INFO L93 Difference]: Finished difference Result 398 states and 486 transitions. [2021-12-16 05:46:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:46:17,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-16 05:46:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:17,408 INFO L225 Difference]: With dead ends: 398 [2021-12-16 05:46:17,408 INFO L226 Difference]: Without dead ends: 396 [2021-12-16 05:46:17,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-12-16 05:46:17,409 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:17,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-12-16 05:46:17,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-16 05:46:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 209. [2021-12-16 05:46:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1932367149758454) internal successors, (247), 208 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 247 transitions. [2021-12-16 05:46:17,413 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 247 transitions. Word has length 41 [2021-12-16 05:46:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:17,413 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 247 transitions. [2021-12-16 05:46:17,413 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) [2021-12-16 05:46:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 247 transitions. [2021-12-16 05:46:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 05:46:17,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:17,414 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:17,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-16 05:46:17,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:46:17,621 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:46:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash -850374243, now seen corresponding path program 5 times [2021-12-16 05:46:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:46:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019158555] [2021-12-16 05:46:17,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:46:17,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:46:17,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:46:17,623 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) [2021-12-16 05:46:17,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-16 05:46:17,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 05:46:17,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:46:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 05:46:17,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:17,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:46:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 80 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-16 05:46:18,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:46:22,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:46:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019158555] [2021-12-16 05:46:22,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019158555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:22,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:46:22,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 28 [2021-12-16 05:46:22,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348622066] [2021-12-16 05:46:22,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:22,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 05:46:22,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:46:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 05:46:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-12-16 05:46:22,123 INFO L87 Difference]: Start difference. First operand 209 states and 247 transitions. Second operand has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:23,733 INFO L93 Difference]: Finished difference Result 243 states and 286 transitions. [2021-12-16 05:46:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:46:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-16 05:46:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:23,736 INFO L225 Difference]: With dead ends: 243 [2021-12-16 05:46:23,736 INFO L226 Difference]: Without dead ends: 240 [2021-12-16 05:46:23,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:46:23,737 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:23,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 415 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 346 Invalid, 0 Unknown, 95 Unchecked, 1.1s Time] [2021-12-16 05:46:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-16 05:46:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 227. [2021-12-16 05:46:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.2) internal successors, (270), 226 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2021-12-16 05:46:23,743 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 62 [2021-12-16 05:46:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:23,743 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2021-12-16 05:46:23,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2021-12-16 05:46:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 05:46:23,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:23,744 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:23,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:23,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:46:23,954 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:46:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2047810797, now seen corresponding path program 1 times [2021-12-16 05:46:23,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:46:23,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169549192] [2021-12-16 05:46:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:23,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:46:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:46:23,956 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) [2021-12-16 05:46:23,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-16 05:46:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:24,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 05:46:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:24,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:46:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 87 proven. 41 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 05:46:24,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:46:28,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:46:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169549192] [2021-12-16 05:46:28,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169549192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:28,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:46:28,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-12-16 05:46:28,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231549644] [2021-12-16 05:46:28,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:28,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 05:46:28,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:46:28,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 05:46:28,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-12-16 05:46:28,038 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:29,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:29,295 INFO L93 Difference]: Finished difference Result 350 states and 416 transitions. [2021-12-16 05:46:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:46:29,297 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-16 05:46:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:29,297 INFO L225 Difference]: With dead ends: 350 [2021-12-16 05:46:29,298 INFO L226 Difference]: Without dead ends: 349 [2021-12-16 05:46:29,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-12-16 05:46:29,298 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 62 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:29,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 552 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 30 Unchecked, 0.8s Time] [2021-12-16 05:46:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-16 05:46:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 273. [2021-12-16 05:46:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 271 states have (on average 1.2103321033210332) internal successors, (328), 272 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 328 transitions. [2021-12-16 05:46:29,302 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 328 transitions. Word has length 64 [2021-12-16 05:46:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:29,303 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 328 transitions. [2021-12-16 05:46:29,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 328 transitions. [2021-12-16 05:46:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 05:46:29,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:29,304 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:29,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-16 05:46:29,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:46:29,511 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:46:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1712671571, now seen corresponding path program 1 times [2021-12-16 05:46:29,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:46:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831357852] [2021-12-16 05:46:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:46:29,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:46:29,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:46:29,513 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:46:29,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-16 05:46:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:46:29,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 05:46:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:29,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:46:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 05:46:30,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:46:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 05:46:33,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 05:46:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831357852] [2021-12-16 05:46:33,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831357852] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:46:33,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 05:46:33,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-12-16 05:46:33,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127067564] [2021-12-16 05:46:33,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 05:46:33,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 05:46:33,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 05:46:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 05:46:33,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-12-16 05:46:33,918 INFO L87 Difference]: Start difference. First operand 273 states and 328 transitions. Second operand has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:46:35,650 INFO L93 Difference]: Finished difference Result 446 states and 533 transitions. [2021-12-16 05:46:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 05:46:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-16 05:46:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:46:35,653 INFO L225 Difference]: With dead ends: 446 [2021-12-16 05:46:35,653 INFO L226 Difference]: Without dead ends: 445 [2021-12-16 05:46:35,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-12-16 05:46:35,653 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 05:46:35,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 510 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 211 Invalid, 0 Unknown, 39 Unchecked, 0.9s Time] [2021-12-16 05:46:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-16 05:46:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 328. [2021-12-16 05:46:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 326 states have (on average 1.2116564417177915) internal successors, (395), 327 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 395 transitions. [2021-12-16 05:46:35,668 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 395 transitions. Word has length 64 [2021-12-16 05:46:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:46:35,668 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 395 transitions. [2021-12-16 05:46:35,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.36) internal successors, (109), 25 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:46:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 395 transitions. [2021-12-16 05:46:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 05:46:35,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:46:35,669 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:46:35,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-16 05:46:35,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 05:46:35,876 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-16 05:46:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:46:35,877 INFO L85 PathProgramCache]: Analyzing trace with hash -186698323, now seen corresponding path program 2 times [2021-12-16 05:46:35,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 05:46:35,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568603582] [2021-12-16 05:46:35,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:46:35,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 05:46:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 05:46:35,879 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 05:46:35,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-16 05:46:35,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:46:35,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:46:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 05:46:35,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:46:35,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-16 05:46:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 87 proven. 41 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 05:46:36,587 INFO L328 TraceCheckSpWp]: Computing backward predicates...