./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/busybox-1.22.0/dirname-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/busybox-1.22.0/dirname-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 90eaf2e76e590922119d90e478fc764e383193134f46d6fe59bc98f3ce7c6611 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 02:42:03,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 02:42:03,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 02:42:03,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 02:42:03,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 02:42:03,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 02:42:03,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 02:42:03,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 02:42:03,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 02:42:03,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 02:42:03,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 02:42:03,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 02:42:03,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 02:42:03,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 02:42:03,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 02:42:03,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 02:42:03,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 02:42:03,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 02:42:03,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 02:42:03,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 02:42:03,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 02:42:03,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 02:42:03,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 02:42:03,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 02:42:03,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 02:42:03,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 02:42:03,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 02:42:03,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 02:42:03,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 02:42:03,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 02:42:03,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 02:42:03,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 02:42:03,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 02:42:03,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 02:42:03,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 02:42:03,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 02:42:03,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 02:42:03,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 02:42:03,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 02:42:03,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 02:42:03,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 02:42:03,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-22 02:42:03,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 02:42:03,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 02:42:03,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 02:42:03,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 02:42:03,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 02:42:03,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 02:42:03,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 02:42:03,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 02:42:03,787 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 02:42:03,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 02:42:03,788 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 02:42:03,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 02:42:03,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 02:42:03,788 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 02:42:03,789 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 02:42:03,789 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 02:42:03,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 02:42:03,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 02:42:03,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 02:42:03,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 02:42:03,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 02:42:03,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 02:42:03,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:42:03,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 02:42:03,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 02:42:03,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 02:42:03,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 02:42:03,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 02:42:03,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90eaf2e76e590922119d90e478fc764e383193134f46d6fe59bc98f3ce7c6611 [2021-12-22 02:42:04,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 02:42:04,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 02:42:04,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 02:42:04,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 02:42:04,022 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 02:42:04,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2021-12-22 02:42:04,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eef8d1f6/3cafaed06b17421991f2b0d177898fa5/FLAG9d0210d1d [2021-12-22 02:42:04,492 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 02:42:04,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2021-12-22 02:42:04,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eef8d1f6/3cafaed06b17421991f2b0d177898fa5/FLAG9d0210d1d [2021-12-22 02:42:04,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eef8d1f6/3cafaed06b17421991f2b0d177898fa5 [2021-12-22 02:42:04,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 02:42:04,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 02:42:04,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 02:42:04,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 02:42:04,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 02:42:04,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:42:04" (1/1) ... [2021-12-22 02:42:04,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc3f0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:04, skipping insertion in model container [2021-12-22 02:42:04,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:42:04" (1/1) ... [2021-12-22 02:42:04,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 02:42:04,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:42:04,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:42:04,968 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) [2021-12-22 02:42:04,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74021b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:04, skipping insertion in model container [2021-12-22 02:42:04,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 02:42:04,969 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-22 02:42:04,972 INFO L158 Benchmark]: Toolchain (without parser) took 443.33ms. Allocated memory was 96.5MB in the beginning and 134.2MB in the end (delta: 37.7MB). Free memory was 62.5MB in the beginning and 101.1MB in the end (delta: -38.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 02:42:04,973 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 96.5MB. Free memory was 54.1MB in the beginning and 54.1MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 02:42:04,974 INFO L158 Benchmark]: CACSL2BoogieTranslator took 441.29ms. Allocated memory was 96.5MB in the beginning and 134.2MB in the end (delta: 37.7MB). Free memory was 62.2MB in the beginning and 101.1MB in the end (delta: -38.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 02:42:04,976 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 96.5MB. Free memory was 54.1MB in the beginning and 54.1MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 441.29ms. Allocated memory was 96.5MB in the beginning and 134.2MB in the end (delta: 37.7MB). Free memory was 62.2MB in the beginning and 101.1MB in the end (delta: -38.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1162]: 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/busybox-1.22.0/dirname-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 90eaf2e76e590922119d90e478fc764e383193134f46d6fe59bc98f3ce7c6611 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 02:42:06,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 02:42:06,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 02:42:06,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 02:42:06,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 02:42:06,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 02:42:06,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 02:42:06,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 02:42:06,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 02:42:06,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 02:42:06,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 02:42:06,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 02:42:06,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 02:42:06,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 02:42:06,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 02:42:06,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 02:42:06,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 02:42:06,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 02:42:06,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 02:42:06,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 02:42:06,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 02:42:06,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 02:42:06,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 02:42:06,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 02:42:06,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 02:42:06,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 02:42:06,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 02:42:06,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 02:42:06,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 02:42:06,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 02:42:06,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 02:42:06,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 02:42:06,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 02:42:06,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 02:42:06,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 02:42:06,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 02:42:06,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 02:42:06,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 02:42:06,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 02:42:06,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 02:42:06,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 02:42:06,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2021-12-22 02:42:06,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 02:42:06,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 02:42:06,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 02:42:06,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 02:42:06,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 02:42:06,507 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 02:42:06,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 02:42:06,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 02:42:06,508 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 02:42:06,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 02:42:06,509 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 02:42:06,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 02:42:06,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 02:42:06,509 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 02:42:06,509 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 02:42:06,509 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 02:42:06,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 02:42:06,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 02:42:06,510 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 02:42:06,510 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 02:42:06,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 02:42:06,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 02:42:06,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 02:42:06,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 02:42:06,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:42:06,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 02:42:06,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 02:42:06,518 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 02:42:06,518 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 02:42:06,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 02:42:06,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 02:42:06,519 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90eaf2e76e590922119d90e478fc764e383193134f46d6fe59bc98f3ce7c6611 [2021-12-22 02:42:06,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 02:42:06,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 02:42:06,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 02:42:06,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 02:42:06,792 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 02:42:06,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2021-12-22 02:42:06,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2b55ed6/b84c5f45fdff4239a40241ecaa1a6e45/FLAG2fe763b86 [2021-12-22 02:42:07,306 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 02:42:07,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/dirname-1.i [2021-12-22 02:42:07,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2b55ed6/b84c5f45fdff4239a40241ecaa1a6e45/FLAG2fe763b86 [2021-12-22 02:42:07,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2b55ed6/b84c5f45fdff4239a40241ecaa1a6e45 [2021-12-22 02:42:07,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 02:42:07,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 02:42:07,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 02:42:07,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 02:42:07,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 02:42:07,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:42:07" (1/1) ... [2021-12-22 02:42:07,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49345f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:07, skipping insertion in model container [2021-12-22 02:42:07,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:42:07" (1/1) ... [2021-12-22 02:42:07,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 02:42:07,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:42:08,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:42:08,149 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-22 02:42:08,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 02:42:08,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:42:08,221 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 02:42:08,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 02:42:08,353 INFO L208 MainTranslator]: Completed translation [2021-12-22 02:42:08,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08 WrapperNode [2021-12-22 02:42:08,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 02:42:08,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 02:42:08,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 02:42:08,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 02:42:08,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,435 INFO L137 Inliner]: procedures = 350, calls = 111, calls flagged for inlining = 8, calls inlined = 7, statements flattened = 265 [2021-12-22 02:42:08,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 02:42:08,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 02:42:08,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 02:42:08,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 02:42:08,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 02:42:08,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 02:42:08,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 02:42:08,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 02:42:08,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (1/1) ... [2021-12-22 02:42:08,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 02:42:08,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 02:42:08,508 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) [2021-12-22 02:42:08,510 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 [2021-12-22 02:42:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-22 02:42:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 02:42:08,532 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 02:42:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 02:42:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-22 02:42:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 02:42:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 02:42:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-22 02:42:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 02:42:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2021-12-22 02:42:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 02:42:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 02:42:08,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 02:42:08,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 02:42:08,655 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 02:42:08,656 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 02:42:09,303 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 02:42:09,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 02:42:09,308 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-22 02:42:09,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:42:09 BoogieIcfgContainer [2021-12-22 02:42:09,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 02:42:09,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 02:42:09,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 02:42:09,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 02:42:09,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:42:07" (1/3) ... [2021-12-22 02:42:09,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aec0717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:42:09, skipping insertion in model container [2021-12-22 02:42:09,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:08" (2/3) ... [2021-12-22 02:42:09,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aec0717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:42:09, skipping insertion in model container [2021-12-22 02:42:09,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:42:09" (3/3) ... [2021-12-22 02:42:09,315 INFO L111 eAbstractionObserver]: Analyzing ICFG dirname-1.i [2021-12-22 02:42:09,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 02:42:09,319 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 73 error locations. [2021-12-22 02:42:09,344 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 02:42:09,349 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 [2021-12-22 02:42:09,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2021-12-22 02:42:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 181 states, 105 states have (on average 1.9428571428571428) internal successors, (204), 178 states have internal predecessors, (204), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 02:42:09,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:09,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 02:42:09,372 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:09,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-22 02:42:09,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:09,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538131968] [2021-12-22 02:42:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:09,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:09,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:09,391 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) [2021-12-22 02:42:09,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 02:42:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 02:42:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:09,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:09,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:09,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:09,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538131968] [2021-12-22 02:42:09,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538131968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:09,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:09,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:42:09,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222868999] [2021-12-22 02:42:09,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:09,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:42:09,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:42:09,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:42:09,599 INFO L87 Difference]: Start difference. First operand has 181 states, 105 states have (on average 1.9428571428571428) internal successors, (204), 178 states have internal predecessors, (204), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:42:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:09,903 INFO L93 Difference]: Finished difference Result 189 states and 206 transitions. [2021-12-22 02:42:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:42:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-22 02:42:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:09,911 INFO L225 Difference]: With dead ends: 189 [2021-12-22 02:42:09,911 INFO L226 Difference]: Without dead ends: 187 [2021-12-22 02:42:09,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:42:09,915 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 162 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:09,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 146 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 02:42:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-22 02:42:09,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2021-12-22 02:42:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 100 states have (on average 1.85) internal successors, (185), 168 states have internal predecessors, (185), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2021-12-22 02:42:09,943 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 3 [2021-12-22 02:42:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:09,944 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2021-12-22 02:42:09,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:42:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2021-12-22 02:42:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 02:42:09,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:09,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 02:42:09,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:10,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:10,146 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:10,147 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-22 02:42:10,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:10,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355541256] [2021-12-22 02:42:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:10,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:10,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:10,148 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) [2021-12-22 02:42:10,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 02:42:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:42:10,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:10,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:10,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:10,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:10,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355541256] [2021-12-22 02:42:10,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355541256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:10,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:10,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:42:10,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714185021] [2021-12-22 02:42:10,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:10,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:42:10,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:42:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:42:10,234 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:42:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:10,649 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2021-12-22 02:42:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:42:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-12-22 02:42:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:10,651 INFO L225 Difference]: With dead ends: 170 [2021-12-22 02:42:10,651 INFO L226 Difference]: Without dead ends: 170 [2021-12-22 02:42:10,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:42:10,652 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 9 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:10,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 292 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 02:42:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-22 02:42:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-12-22 02:42:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 100 states have (on average 1.84) internal successors, (184), 167 states have internal predecessors, (184), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 186 transitions. [2021-12-22 02:42:10,658 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 186 transitions. Word has length 3 [2021-12-22 02:42:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:10,658 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 186 transitions. [2021-12-22 02:42:10,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 02:42:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 186 transitions. [2021-12-22 02:42:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 02:42:10,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:10,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 02:42:10,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:10,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:10,864 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-22 02:42:10,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:10,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715888752] [2021-12-22 02:42:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:10,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:10,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:10,868 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) [2021-12-22 02:42:10,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 02:42:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 02:42:10,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:10,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:11,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:11,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:11,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715888752] [2021-12-22 02:42:11,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715888752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:11,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:11,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:42:11,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252374423] [2021-12-22 02:42:11,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:11,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:42:11,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:42:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:42:11,007 INFO L87 Difference]: Start difference. First operand 170 states and 186 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) [2021-12-22 02:42:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:11,366 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2021-12-22 02:42:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:42:11,366 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 [2021-12-22 02:42:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:11,367 INFO L225 Difference]: With dead ends: 174 [2021-12-22 02:42:11,367 INFO L226 Difference]: Without dead ends: 174 [2021-12-22 02:42:11,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:42:11,368 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:11,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 291 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 02:42:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-22 02:42:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-12-22 02:42:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 102 states have (on average 1.8235294117647058) internal successors, (186), 169 states have internal predecessors, (186), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 188 transitions. [2021-12-22 02:42:11,376 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 188 transitions. Word has length 6 [2021-12-22 02:42:11,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:11,377 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 188 transitions. [2021-12-22 02:42:11,377 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) [2021-12-22 02:42:11,377 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 188 transitions. [2021-12-22 02:42:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 02:42:11,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:11,377 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:11,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:11,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:11,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:11,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1261842348, now seen corresponding path program 1 times [2021-12-22 02:42:11,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:11,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245190292] [2021-12-22 02:42:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:11,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:11,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:11,590 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) [2021-12-22 02:42:11,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 02:42:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:11,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:42:11,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:11,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:11,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:42:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:12,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245190292] [2021-12-22 02:42:12,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245190292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 02:42:12,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 02:42:12,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-22 02:42:12,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799170182] [2021-12-22 02:42:12,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 02:42:12,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 02:42:12,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 02:42:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 02:42:12,448 INFO L87 Difference]: Start difference. First operand 172 states and 188 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2021-12-22 02:42:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:14,886 INFO L93 Difference]: Finished difference Result 178 states and 194 transitions. [2021-12-22 02:42:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 02:42:14,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 10 [2021-12-22 02:42:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:14,888 INFO L225 Difference]: With dead ends: 178 [2021-12-22 02:42:14,888 INFO L226 Difference]: Without dead ends: 178 [2021-12-22 02:42:14,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:42:14,889 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 32 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:14,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 625 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 02:42:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-22 02:42:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-12-22 02:42:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 109 states have (on average 1.761467889908257) internal successors, (192), 175 states have internal predecessors, (192), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 194 transitions. [2021-12-22 02:42:14,894 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 194 transitions. Word has length 10 [2021-12-22 02:42:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:14,894 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 194 transitions. [2021-12-22 02:42:14,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2021-12-22 02:42:14,894 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 194 transitions. [2021-12-22 02:42:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 02:42:14,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:14,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:14,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:15,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:15,102 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2007736717, now seen corresponding path program 1 times [2021-12-22 02:42:15,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:15,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863471690] [2021-12-22 02:42:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:15,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:15,106 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) [2021-12-22 02:42:15,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 02:42:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:15,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 02:42:15,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:15,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:42:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:15,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863471690] [2021-12-22 02:42:15,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863471690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 02:42:15,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 02:42:15,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-22 02:42:15,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971656845] [2021-12-22 02:42:15,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 02:42:15,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 02:42:15,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 02:42:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:42:15,347 INFO L87 Difference]: Start difference. First operand 178 states and 194 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 02:42:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:15,559 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2021-12-22 02:42:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 02:42:15,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-12-22 02:42:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:15,560 INFO L225 Difference]: With dead ends: 198 [2021-12-22 02:42:15,560 INFO L226 Difference]: Without dead ends: 198 [2021-12-22 02:42:15,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-12-22 02:42:15,561 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 27 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:15,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1268 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 02:42:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-12-22 02:42:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-12-22 02:42:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 195 states have internal predecessors, (212), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 214 transitions. [2021-12-22 02:42:15,565 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 214 transitions. Word has length 25 [2021-12-22 02:42:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:15,566 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 214 transitions. [2021-12-22 02:42:15,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 02:42:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 214 transitions. [2021-12-22 02:42:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 02:42:15,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:15,567 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:15,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:15,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:15,775 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:15,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1499348962, now seen corresponding path program 2 times [2021-12-22 02:42:15,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:15,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486466197] [2021-12-22 02:42:15,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 02:42:15,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:15,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:15,777 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) [2021-12-22 02:42:15,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 02:42:15,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 02:42:15,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 02:42:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:42:15,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:15,942 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 02:42:15,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-12-22 02:42:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-22 02:42:15,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:15,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486466197] [2021-12-22 02:42:15,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486466197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:15,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:15,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:42:15,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452642598] [2021-12-22 02:42:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:15,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:42:15,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:42:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:42:15,961 INFO L87 Difference]: Start difference. First operand 198 states and 214 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:16,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:16,217 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2021-12-22 02:42:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:42:16,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-22 02:42:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:16,218 INFO L225 Difference]: With dead ends: 209 [2021-12-22 02:42:16,218 INFO L226 Difference]: Without dead ends: 209 [2021-12-22 02:42:16,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:42:16,219 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 147 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:16,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 149 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 02:42:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-22 02:42:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 193. [2021-12-22 02:42:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 129 states have (on average 1.6046511627906976) internal successors, (207), 190 states have internal predecessors, (207), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 209 transitions. [2021-12-22 02:42:16,232 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 209 transitions. Word has length 45 [2021-12-22 02:42:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:16,233 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 209 transitions. [2021-12-22 02:42:16,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 209 transitions. [2021-12-22 02:42:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 02:42:16,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:16,236 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:16,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:16,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:16,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:16,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1499348961, now seen corresponding path program 1 times [2021-12-22 02:42:16,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:16,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315993711] [2021-12-22 02:42:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:16,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:16,453 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) [2021-12-22 02:42:16,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 02:42:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 02:42:16,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:16,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:42:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 02:42:16,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315993711] [2021-12-22 02:42:16,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315993711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 02:42:16,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 02:42:16,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-22 02:42:16,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813477082] [2021-12-22 02:42:16,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 02:42:16,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 02:42:16,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:16,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 02:42:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-22 02:42:16,921 INFO L87 Difference]: Start difference. First operand 193 states and 209 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 02:42:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:17,242 INFO L93 Difference]: Finished difference Result 201 states and 217 transitions. [2021-12-22 02:42:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 02:42:17,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-22 02:42:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:17,244 INFO L225 Difference]: With dead ends: 201 [2021-12-22 02:42:17,244 INFO L226 Difference]: Without dead ends: 201 [2021-12-22 02:42:17,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-22 02:42:17,245 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 33 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:17,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1813 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 02:42:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-22 02:42:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-12-22 02:42:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 137 states have (on average 1.5693430656934306) internal successors, (215), 198 states have internal predecessors, (215), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-12-22 02:42:17,259 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 45 [2021-12-22 02:42:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:17,259 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-12-22 02:42:17,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 02:42:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-12-22 02:42:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 02:42:17,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:17,260 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:17,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:17,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:17,469 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash 621817561, now seen corresponding path program 2 times [2021-12-22 02:42:17,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:17,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685628717] [2021-12-22 02:42:17,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 02:42:17,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:17,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:17,472 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) [2021-12-22 02:42:17,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-22 02:42:17,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 02:42:17,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 02:42:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 02:42:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:17,701 INFO L353 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-22 02:42:17,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 02:42:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:17,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:17,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685628717] [2021-12-22 02:42:17,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685628717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:17,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:17,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 02:42:17,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243255798] [2021-12-22 02:42:17,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:17,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 02:42:17,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:17,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 02:42:17,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 02:42:17,749 INFO L87 Difference]: Start difference. First operand 201 states and 217 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:18,838 INFO L93 Difference]: Finished difference Result 321 states and 351 transitions. [2021-12-22 02:42:18,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 02:42:18,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-12-22 02:42:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:18,841 INFO L225 Difference]: With dead ends: 321 [2021-12-22 02:42:18,841 INFO L226 Difference]: Without dead ends: 321 [2021-12-22 02:42:18,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 02:42:18,841 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 436 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:18,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 484 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 02:42:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-12-22 02:42:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 265. [2021-12-22 02:42:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 202 states have (on average 1.6732673267326732) internal successors, (338), 262 states have internal predecessors, (338), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 340 transitions. [2021-12-22 02:42:18,846 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 340 transitions. Word has length 53 [2021-12-22 02:42:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:18,846 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 340 transitions. [2021-12-22 02:42:18,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 340 transitions. [2021-12-22 02:42:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 02:42:18,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:18,848 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:18,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:19,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:19,057 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 372982570, now seen corresponding path program 1 times [2021-12-22 02:42:19,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:19,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228954568] [2021-12-22 02:42:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:19,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:19,059 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) [2021-12-22 02:42:19,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-22 02:42:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 02:42:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 02:42:19,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-22 02:42:19,498 INFO L387 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 12 treesize of output 10 [2021-12-22 02:42:19,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 02:42:19,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 02:42:19,676 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:42:19,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 02:42:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:19,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:19,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:19,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228954568] [2021-12-22 02:42:19,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228954568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:19,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:19,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 02:42:19,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602981766] [2021-12-22 02:42:19,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:19,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 02:42:19,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 02:42:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-22 02:42:19,716 INFO L87 Difference]: Start difference. First operand 265 states and 340 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:19,768 INFO L93 Difference]: Finished difference Result 266 states and 341 transitions. [2021-12-22 02:42:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 02:42:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-12-22 02:42:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:19,769 INFO L225 Difference]: With dead ends: 266 [2021-12-22 02:42:19,769 INFO L226 Difference]: Without dead ends: 266 [2021-12-22 02:42:19,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-22 02:42:19,771 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 4 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:19,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 864 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 166 Unchecked, 0.0s Time] [2021-12-22 02:42:19,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-22 02:42:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-12-22 02:42:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 203 states have (on average 1.6699507389162562) internal successors, (339), 263 states have internal predecessors, (339), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 341 transitions. [2021-12-22 02:42:19,776 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 341 transitions. Word has length 56 [2021-12-22 02:42:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:19,777 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 341 transitions. [2021-12-22 02:42:19,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 341 transitions. [2021-12-22 02:42:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 02:42:19,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:19,779 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:19,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:19,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:19,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1322442817, now seen corresponding path program 1 times [2021-12-22 02:42:19,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:19,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334438500] [2021-12-22 02:42:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:19,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:19,989 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) [2021-12-22 02:42:19,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-22 02:42:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:20,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 02:42:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:20,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:20,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334438500] [2021-12-22 02:42:20,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334438500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:20,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:20,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 02:42:20,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106574676] [2021-12-22 02:42:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:20,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 02:42:20,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 02:42:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 02:42:20,250 INFO L87 Difference]: Start difference. First operand 266 states and 341 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:20,602 INFO L93 Difference]: Finished difference Result 284 states and 363 transitions. [2021-12-22 02:42:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 02:42:20,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-22 02:42:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:20,603 INFO L225 Difference]: With dead ends: 284 [2021-12-22 02:42:20,603 INFO L226 Difference]: Without dead ends: 284 [2021-12-22 02:42:20,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 02:42:20,604 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 246 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:20,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 186 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 02:42:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-22 02:42:20,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-12-22 02:42:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 203 states have (on average 1.6108374384236452) internal successors, (327), 257 states have internal predecessors, (327), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 329 transitions. [2021-12-22 02:42:20,608 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 329 transitions. Word has length 57 [2021-12-22 02:42:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:20,608 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 329 transitions. [2021-12-22 02:42:20,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 329 transitions. [2021-12-22 02:42:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 02:42:20,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:20,609 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:20,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:20,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:20,823 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1322442816, now seen corresponding path program 1 times [2021-12-22 02:42:20,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:20,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038156151] [2021-12-22 02:42:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:20,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:20,825 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) [2021-12-22 02:42:20,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-22 02:42:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:21,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 02:42:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:21,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:21,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:21,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038156151] [2021-12-22 02:42:21,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038156151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:21,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:21,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 02:42:21,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129838510] [2021-12-22 02:42:21,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:21,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 02:42:21,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 02:42:21,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 02:42:21,157 INFO L87 Difference]: Start difference. First operand 260 states and 329 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:21,376 INFO L93 Difference]: Finished difference Result 218 states and 235 transitions. [2021-12-22 02:42:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 02:42:21,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-22 02:42:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:21,377 INFO L225 Difference]: With dead ends: 218 [2021-12-22 02:42:21,377 INFO L226 Difference]: Without dead ends: 218 [2021-12-22 02:42:21,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 02:42:21,378 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 182 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:21,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 617 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 02:42:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-22 02:42:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 196. [2021-12-22 02:42:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 139 states have (on average 1.5107913669064748) internal successors, (210), 193 states have internal predecessors, (210), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2021-12-22 02:42:21,381 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 57 [2021-12-22 02:42:21,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:21,381 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2021-12-22 02:42:21,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2021-12-22 02:42:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 02:42:21,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:21,382 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:21,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:21,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:21,582 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:21,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1953963627, now seen corresponding path program 1 times [2021-12-22 02:42:21,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:21,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314244642] [2021-12-22 02:42:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:21,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:21,584 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) [2021-12-22 02:42:21,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-22 02:42:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 02:42:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:21,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:21,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314244642] [2021-12-22 02:42:21,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314244642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:21,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:21,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 02:42:21,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951079721] [2021-12-22 02:42:21,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:21,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 02:42:21,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 02:42:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 02:42:21,895 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:22,051 INFO L93 Difference]: Finished difference Result 214 states and 231 transitions. [2021-12-22 02:42:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 02:42:22,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-12-22 02:42:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:22,052 INFO L225 Difference]: With dead ends: 214 [2021-12-22 02:42:22,052 INFO L226 Difference]: Without dead ends: 214 [2021-12-22 02:42:22,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 02:42:22,053 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 214 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:22,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 306 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 02:42:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-22 02:42:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2021-12-22 02:42:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 151 states have (on average 1.509933774834437) internal successors, (228), 204 states have internal predecessors, (228), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2021-12-22 02:42:22,056 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 58 [2021-12-22 02:42:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:22,056 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2021-12-22 02:42:22,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2021-12-22 02:42:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 02:42:22,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:22,057 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:22,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:22,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:22,270 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:22,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:22,270 INFO L85 PathProgramCache]: Analyzing trace with hash 443330279, now seen corresponding path program 1 times [2021-12-22 02:42:22,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:22,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231687562] [2021-12-22 02:42:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:22,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:22,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:22,272 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) [2021-12-22 02:42:22,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-22 02:42:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:22,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 02:42:22,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:22,741 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-22 02:42:22,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-22 02:42:22,761 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-22 02:42:22,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-22 02:42:22,883 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:42:22,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 02:42:22,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-22 02:42:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:23,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:23,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231687562] [2021-12-22 02:42:23,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231687562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:23,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:23,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 02:42:23,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295716110] [2021-12-22 02:42:23,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:23,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 02:42:23,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 02:42:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 02:42:23,009 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:23,067 INFO L93 Difference]: Finished difference Result 207 states and 229 transitions. [2021-12-22 02:42:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 02:42:23,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-22 02:42:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:23,069 INFO L225 Difference]: With dead ends: 207 [2021-12-22 02:42:23,069 INFO L226 Difference]: Without dead ends: 207 [2021-12-22 02:42:23,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 02:42:23,069 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 4 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:23,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 896 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 246 Unchecked, 0.0s Time] [2021-12-22 02:42:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-22 02:42:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-12-22 02:42:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 151 states have (on average 1.5033112582781456) internal successors, (227), 204 states have internal predecessors, (227), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 229 transitions. [2021-12-22 02:42:23,073 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 229 transitions. Word has length 59 [2021-12-22 02:42:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:23,073 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 229 transitions. [2021-12-22 02:42:23,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 229 transitions. [2021-12-22 02:42:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 02:42:23,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:23,074 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:23,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:23,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:23,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash 443330278, now seen corresponding path program 1 times [2021-12-22 02:42:23,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:23,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705753487] [2021-12-22 02:42:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:23,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:23,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:23,289 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) [2021-12-22 02:42:23,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-22 02:42:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 02:42:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:23,687 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-22 02:42:23,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-12-22 02:42:23,709 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-22 02:42:23,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-22 02:42:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:23,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:23,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705753487] [2021-12-22 02:42:23,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705753487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:23,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:23,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 02:42:23,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695295884] [2021-12-22 02:42:23,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:23,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 02:42:23,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 02:42:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:42:23,723 INFO L87 Difference]: Start difference. First operand 207 states and 229 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:23,973 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2021-12-22 02:42:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 02:42:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-12-22 02:42:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:23,975 INFO L225 Difference]: With dead ends: 214 [2021-12-22 02:42:23,975 INFO L226 Difference]: Without dead ends: 214 [2021-12-22 02:42:23,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 02:42:23,975 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 132 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:23,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 02:42:23,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-22 02:42:23,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2021-12-22 02:42:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 156 states have (on average 1.5) internal successors, (234), 208 states have internal predecessors, (234), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 236 transitions. [2021-12-22 02:42:23,978 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 236 transitions. Word has length 59 [2021-12-22 02:42:23,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:23,978 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 236 transitions. [2021-12-22 02:42:23,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 236 transitions. [2021-12-22 02:42:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 02:42:23,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:23,979 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:23,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:24,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:24,180 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash 227895600, now seen corresponding path program 1 times [2021-12-22 02:42:24,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:24,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211377451] [2021-12-22 02:42:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:24,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:24,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:24,182 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) [2021-12-22 02:42:24,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-22 02:42:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 02:42:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:24,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:24,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:24,756 INFO L353 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-12-22 02:42:24,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-12-22 02:42:24,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 12 [2021-12-22 02:42:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:24,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:24,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:24,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211377451] [2021-12-22 02:42:24,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211377451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:24,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:24,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 02:42:24,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42960676] [2021-12-22 02:42:24,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:24,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 02:42:24,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:24,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 02:42:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 02:42:24,814 INFO L87 Difference]: Start difference. First operand 211 states and 236 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:26,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 02:42:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:27,588 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2021-12-22 02:42:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 02:42:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-12-22 02:42:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:27,589 INFO L225 Difference]: With dead ends: 212 [2021-12-22 02:42:27,589 INFO L226 Difference]: Without dead ends: 212 [2021-12-22 02:42:27,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:42:27,590 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 9 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:27,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 627 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 02:42:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-22 02:42:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-12-22 02:42:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 156 states have (on average 1.4935897435897436) internal successors, (233), 208 states have internal predecessors, (233), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2021-12-22 02:42:27,593 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 62 [2021-12-22 02:42:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:27,593 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2021-12-22 02:42:27,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:27,593 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2021-12-22 02:42:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 02:42:27,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:27,593 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:27,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:27,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:27,804 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:27,804 INFO L85 PathProgramCache]: Analyzing trace with hash 227895601, now seen corresponding path program 1 times [2021-12-22 02:42:27,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:27,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809568357] [2021-12-22 02:42:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:27,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:27,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:27,806 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) [2021-12-22 02:42:27,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-22 02:42:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:28,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 02:42:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:28,310 INFO L387 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 12 treesize of output 10 [2021-12-22 02:42:28,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:28,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:28,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:28,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-22 02:42:28,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 02:42:28,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 9 [2021-12-22 02:42:28,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-22 02:42:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:28,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:28,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:28,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809568357] [2021-12-22 02:42:28,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809568357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:28,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:28,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 02:42:28,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785593951] [2021-12-22 02:42:28,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:28,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 02:42:28,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 02:42:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 02:42:28,525 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:29,471 INFO L93 Difference]: Finished difference Result 210 states and 233 transitions. [2021-12-22 02:42:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 02:42:29,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-12-22 02:42:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:29,472 INFO L225 Difference]: With dead ends: 210 [2021-12-22 02:42:29,472 INFO L226 Difference]: Without dead ends: 210 [2021-12-22 02:42:29,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:42:29,473 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 161 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:29,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 527 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 02:42:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-22 02:42:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-12-22 02:42:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 156 states have (on average 1.4807692307692308) internal successors, (231), 207 states have internal predecessors, (231), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 233 transitions. [2021-12-22 02:42:29,476 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 233 transitions. Word has length 62 [2021-12-22 02:42:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:29,476 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 233 transitions. [2021-12-22 02:42:29,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 233 transitions. [2021-12-22 02:42:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 02:42:29,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:29,476 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2021-12-22 02:42:29,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:29,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:29,690 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash 90810075, now seen corresponding path program 1 times [2021-12-22 02:42:29,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:29,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482942403] [2021-12-22 02:42:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:29,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:29,692 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) [2021-12-22 02:42:29,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-22 02:42:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:30,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 02:42:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:30,176 INFO L387 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 12 treesize of output 10 [2021-12-22 02:42:30,214 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 02:42:30,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 02:42:30,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:30,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-22 02:42:30,422 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:42:30,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2021-12-22 02:42:30,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-22 02:42:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:30,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:30,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:30,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482942403] [2021-12-22 02:42:30,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482942403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:30,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:30,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 02:42:30,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119271299] [2021-12-22 02:42:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:30,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 02:42:30,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 02:42:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 02:42:30,483 INFO L87 Difference]: Start difference. First operand 210 states and 233 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:31,209 INFO L93 Difference]: Finished difference Result 231 states and 254 transitions. [2021-12-22 02:42:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 02:42:31,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-22 02:42:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:31,217 INFO L225 Difference]: With dead ends: 231 [2021-12-22 02:42:31,217 INFO L226 Difference]: Without dead ends: 231 [2021-12-22 02:42:31,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-22 02:42:31,217 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 195 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:31,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 428 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 80 Unchecked, 0.6s Time] [2021-12-22 02:42:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-22 02:42:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 218. [2021-12-22 02:42:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 165 states have (on average 1.4848484848484849) internal successors, (245), 215 states have internal predecessors, (245), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 247 transitions. [2021-12-22 02:42:31,220 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 247 transitions. Word has length 66 [2021-12-22 02:42:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:31,220 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 247 transitions. [2021-12-22 02:42:31,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 247 transitions. [2021-12-22 02:42:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 02:42:31,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:31,221 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2021-12-22 02:42:31,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:31,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:31,438 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:31,439 INFO L85 PathProgramCache]: Analyzing trace with hash 90810076, now seen corresponding path program 1 times [2021-12-22 02:42:31,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:31,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498601812] [2021-12-22 02:42:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:31,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:31,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:31,440 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) [2021-12-22 02:42:31,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-22 02:42:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:32,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 02:42:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:32,229 INFO L387 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 12 treesize of output 10 [2021-12-22 02:42:32,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:32,283 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:42:32,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 02:42:32,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:32,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:32,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-22 02:42:32,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 02:42:32,526 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:42:32,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-12-22 02:42:32,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-22 02:42:32,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-22 02:42:32,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-22 02:42:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-22 02:42:32,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 02:42:32,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:32,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498601812] [2021-12-22 02:42:32,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498601812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 02:42:32,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 02:42:32,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 02:42:32,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092276418] [2021-12-22 02:42:32,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 02:42:32,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 02:42:32,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:32,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 02:42:32,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-22 02:42:32,658 INFO L87 Difference]: Start difference. First operand 218 states and 247 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:33,780 INFO L93 Difference]: Finished difference Result 231 states and 251 transitions. [2021-12-22 02:42:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 02:42:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-12-22 02:42:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:33,781 INFO L225 Difference]: With dead ends: 231 [2021-12-22 02:42:33,781 INFO L226 Difference]: Without dead ends: 231 [2021-12-22 02:42:33,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-22 02:42:33,782 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 193 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:33,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 390 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 02:42:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-22 02:42:33,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 218. [2021-12-22 02:42:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 165 states have (on average 1.4606060606060607) internal successors, (241), 215 states have internal predecessors, (241), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 243 transitions. [2021-12-22 02:42:33,794 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 243 transitions. Word has length 66 [2021-12-22 02:42:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:33,794 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 243 transitions. [2021-12-22 02:42:33,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 243 transitions. [2021-12-22 02:42:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 02:42:33,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:33,795 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:33,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:34,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:34,008 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1330037336, now seen corresponding path program 1 times [2021-12-22 02:42:34,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:34,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978691857] [2021-12-22 02:42:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:34,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:34,009 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) [2021-12-22 02:42:34,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-22 02:42:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 02:42:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:34,556 INFO L387 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 12 treesize of output 10 [2021-12-22 02:42:34,593 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-22 02:42:34,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2021-12-22 02:42:34,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:34,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-22 02:42:34,799 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:42:34,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2021-12-22 02:42:34,904 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:42:34,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2021-12-22 02:42:34,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-22 02:42:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-22 02:42:34,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:42:35,125 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse0 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0) v_ArrVal_1339) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0))) (_ bv1 1))) is different from false [2021-12-22 02:42:35,155 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem144#1.base| v_ArrVal_1338))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1339)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-22 02:42:35,170 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1338))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1339)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-22 02:42:35,206 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1337 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1339 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1337))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1338)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1339)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-22 02:42:35,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 02:42:35,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 76 [2021-12-22 02:42:35,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3189 treesize of output 2532 [2021-12-22 02:42:35,263 INFO L387 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 2528 treesize of output 2052 [2021-12-22 02:42:35,279 INFO L387 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 2052 treesize of output 1548 [2021-12-22 02:42:35,291 INFO L387 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 1548 treesize of output 1492 [2021-12-22 02:42:57,810 INFO L353 Elim1Store]: treesize reduction -11, result has 113.6 percent of original size [2021-12-22 02:42:57,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 187 [2021-12-22 02:42:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 190 trivial. 2 not checked. [2021-12-22 02:42:58,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 02:42:58,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978691857] [2021-12-22 02:42:58,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978691857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 02:42:58,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 02:42:58,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-12-22 02:42:58,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911782269] [2021-12-22 02:42:58,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 02:42:58,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 02:42:58,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 02:42:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 02:42:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=163, Unknown=8, NotChecked=116, Total=342 [2021-12-22 02:42:58,222 INFO L87 Difference]: Start difference. First operand 218 states and 243 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 02:42:59,026 INFO L93 Difference]: Finished difference Result 220 states and 243 transitions. [2021-12-22 02:42:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 02:42:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-12-22 02:42:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 02:42:59,027 INFO L225 Difference]: With dead ends: 220 [2021-12-22 02:42:59,027 INFO L226 Difference]: Without dead ends: 220 [2021-12-22 02:42:59,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=65, Invalid=183, Unknown=8, NotChecked=124, Total=380 [2021-12-22 02:42:59,028 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 20 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 02:42:59,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1329 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 615 Unchecked, 0.6s Time] [2021-12-22 02:42:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-22 02:42:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2021-12-22 02:42:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 165 states have (on average 1.4545454545454546) internal successors, (240), 215 states have internal predecessors, (240), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 242 transitions. [2021-12-22 02:42:59,031 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 242 transitions. Word has length 71 [2021-12-22 02:42:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 02:42:59,031 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 242 transitions. [2021-12-22 02:42:59,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 02:42:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 242 transitions. [2021-12-22 02:42:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 02:42:59,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 02:42:59,032 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 02:42:59,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-22 02:42:59,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 02:42:59,243 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 69 more)] === [2021-12-22 02:42:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 02:42:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1330037335, now seen corresponding path program 1 times [2021-12-22 02:42:59,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 02:42:59,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [689828820] [2021-12-22 02:42:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 02:42:59,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 02:42:59,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 02:42:59,245 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) [2021-12-22 02:42:59,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-22 02:42:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 02:42:59,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 02:42:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 02:42:59,826 INFO L387 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 12 treesize of output 10 [2021-12-22 02:42:59,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 02:42:59,866 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 02:42:59,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 02:42:59,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:59,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-22 02:42:59,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-22 02:42:59,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 02:43:00,101 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:43:00,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-12-22 02:43:00,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-22 02:43:00,259 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 02:43:00,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-12-22 02:43:00,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-22 02:43:00,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 13 [2021-12-22 02:43:00,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-12-22 02:43:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-22 02:43:00,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 02:43:02,003 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem146#1.base| v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (.cse1 ((_ sign_extend 32) (bvadd |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32))))) (bvule (bvadd .cse0 .cse1) (bvadd .cse0 (_ bv1 64) .cse1)))) (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1458 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem146#1.base| v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2) (_ bv1 64) ((_ sign_extend 32) (bvadd |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32)))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem146#1.base| v_ArrVal_1458) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2)))))) is different from false [2021-12-22 02:43:02,139 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (let ((.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2) v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2))) (.cse1 ((_ sign_extend 32) (bvadd |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32))))) (bvule (bvadd .cse0 .cse1) (bvadd .cse0 (_ bv1 64) .cse1)))) (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1458 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse4 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4) (_ bv1 64) ((_ sign_extend 32) (bvadd |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32)))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1458) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))))))) is different from false [2021-12-22 02:43:02,268 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (let ((.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2) v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2))) (.cse1 ((_ sign_extend 32) (_ bv1 32)))) (bvule (bvadd .cse0 .cse1) (bvadd .cse0 .cse1 (_ bv1 64))))) (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1458 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse4 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4) ((_ sign_extend 32) (_ bv1 32)) (_ bv1 64)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1458) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))))))) is different from false [2021-12-22 02:43:02,339 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1457 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1456 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 ((_ sign_extend 32) (_ bv1 32))) (.cse1 (let ((.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem144#1.base| v_ArrVal_1456) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem144#1.base| v_ArrVal_1457) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2) v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2)))) (bvule (bvadd .cse0 .cse1) (bvadd .cse0 .cse1 (_ bv1 64))))) (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1458 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1457 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1456 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem144#1.base| v_ArrVal_1457)) (.cse4 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse3 (select (select .cse5 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))) (bvule (bvadd ((_ sign_extend 32) (_ bv1 32)) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem144#1.base| v_ArrVal_1456) .cse3 v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4) (_ bv1 64)) (select |c_#length| (select (select (store .cse5 .cse3 v_ArrVal_1458) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))))))) is different from false [2021-12-22 02:43:02,478 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1458 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1457 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1456 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1457))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1456) .cse1 v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2) ((_ sign_extend 32) (_ bv1 32)) (_ bv1 64)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_1458) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2)))))))) (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1457 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1456 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse4 (let ((.cse7 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse7))) (store (store |c_#memory_$Pointer$.offset| .cse6 v_ArrVal_1456) (select (select (store |c_#memory_$Pointer$.base| .cse6 v_ArrVal_1457) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse7) v_ArrVal_1459)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse7))) (.cse5 ((_ sign_extend 32) (_ bv1 32)))) (bvule (bvadd .cse4 .cse5) (bvadd .cse4 .cse5 (_ bv1 64)))))) is different from false [2021-12-22 02:43:02,602 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1455 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1454 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1457 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1456 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 ((_ sign_extend 32) (_ bv1 32))) (.cse1 (let ((.cse4 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1454))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1455) .cse2 v_ArrVal_1456) (select (select (store .cse3 .cse2 v_ArrVal_1457) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4) v_ArrVal_1459))) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4)))) (bvule (bvadd .cse0 .cse1) (bvadd .cse0 (_ bv1 64) .cse1)))) (forall ((v_ArrVal_1459 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1458 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1455 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1454 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1457 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1456 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1454)) (.cse7 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~5#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse5 (select (select .cse9 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse7))) (let ((.cse8 (store .cse9 .cse5 v_ArrVal_1457))) (let ((.cse6 (select (select .cse8 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse7))) (bvule (bvadd ((_ sign_extend 32) (_ bv1 32)) (_ bv1 64) (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1455) .cse5 v_ArrVal_1456) .cse6 v_ArrVal_1459) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse7)) (select |c_#length| (select (select (store .cse8 .cse6 v_ArrVal_1458) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse7))))))))) is different from false [2021-12-22 02:43:02,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 02:43:02,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 228 [2021-12-22 02:43:02,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 02:43:02,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 137 [2021-12-22 02:43:02,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22257 treesize of output 18594 [2021-12-22 02:43:03,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135483 treesize of output 131154 [2021-12-22 02:43:03,485 INFO L387 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 131150 treesize of output 119054 [2021-12-22 02:43:03,704 INFO L387 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 119054 treesize of output 106958 [2021-12-22 02:43:03,926 INFO L387 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 106958 treesize of output 91558 [2021-12-22 02:43:04,145 INFO L387 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 91558 treesize of output 86182 [2021-12-22 02:43:04,360 INFO L387 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 86182 treesize of output 71916 [2021-12-22 02:43:04,597 INFO L387 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 71916 treesize of output 68556