./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/busybox-1.22.0/hostid.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/hostid.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 de0fc62ae58e6d221c3194714bc6cea21909b72dd1b37b4566b87d84683f34c8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 20:40:03,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 20:40:03,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 20:40:03,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 20:40:03,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 20:40:03,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 20:40:03,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 20:40:03,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 20:40:03,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 20:40:03,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 20:40:03,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 20:40:03,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 20:40:03,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 20:40:03,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 20:40:03,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 20:40:03,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 20:40:03,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 20:40:03,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 20:40:03,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 20:40:03,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 20:40:03,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 20:40:03,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 20:40:03,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 20:40:03,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 20:40:03,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 20:40:03,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 20:40:03,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 20:40:03,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 20:40:03,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 20:40:03,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 20:40:03,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 20:40:03,568 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 20:40:03,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 20:40:03,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 20:40:03,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 20:40:03,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 20:40:03,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 20:40:03,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 20:40:03,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 20:40:03,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 20:40:03,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 20:40:03,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-21 20:40:03,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 20:40:03,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 20:40:03,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 20:40:03,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 20:40:03,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 20:40:03,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 20:40:03,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 20:40:03,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 20:40:03,602 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 20:40:03,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 20:40:03,603 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 20:40:03,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 20:40:03,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 20:40:03,603 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 20:40:03,603 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 20:40:03,604 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 20:40:03,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 20:40:03,604 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 20:40:03,604 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 20:40:03,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 20:40:03,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 20:40:03,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 20:40:03,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:40:03,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 20:40:03,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 20:40:03,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 20:40:03,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 20:40:03,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 20:40:03,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de0fc62ae58e6d221c3194714bc6cea21909b72dd1b37b4566b87d84683f34c8 [2021-12-21 20:40:03,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 20:40:03,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 20:40:03,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 20:40:03,801 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 20:40:03,801 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 20:40:03,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/hostid.i [2021-12-21 20:40:03,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537752a2a/e9ad447ec54248ea9b97d8808b25a309/FLAG66e1e3b48 [2021-12-21 20:40:04,235 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 20:40:04,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/hostid.i [2021-12-21 20:40:04,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537752a2a/e9ad447ec54248ea9b97d8808b25a309/FLAG66e1e3b48 [2021-12-21 20:40:04,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/537752a2a/e9ad447ec54248ea9b97d8808b25a309 [2021-12-21 20:40:04,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 20:40:04,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 20:40:04,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 20:40:04,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 20:40:04,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 20:40:04,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:40:04" (1/1) ... [2021-12-21 20:40:04,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606d68a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:04, skipping insertion in model container [2021-12-21 20:40:04,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:40:04" (1/1) ... [2021-12-21 20:40:04,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 20:40:04,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 20:40:05,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:40:05,096 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-12-21 20:40:05,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ea5e8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:05, skipping insertion in model container [2021-12-21 20:40:05,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 20:40:05,097 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-21 20:40:05,098 INFO L158 Benchmark]: Toolchain (without parser) took 524.24ms. Allocated memory was 104.9MB in the beginning and 144.7MB in the end (delta: 39.8MB). Free memory was 73.9MB in the beginning and 110.8MB in the end (delta: -36.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 20:40:05,098 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 20:40:05,099 INFO L158 Benchmark]: CACSL2BoogieTranslator took 522.63ms. Allocated memory was 104.9MB in the beginning and 144.7MB in the end (delta: 39.8MB). Free memory was 73.9MB in the beginning and 110.8MB in the end (delta: -36.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 20:40:05,100 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 522.63ms. Allocated memory was 104.9MB in the beginning and 144.7MB in the end (delta: 39.8MB). Free memory was 73.9MB in the beginning and 110.8MB in the end (delta: -36.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1774]: 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/hostid.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 de0fc62ae58e6d221c3194714bc6cea21909b72dd1b37b4566b87d84683f34c8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 20:40:06,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 20:40:06,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 20:40:06,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 20:40:06,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 20:40:06,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 20:40:06,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 20:40:06,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 20:40:06,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 20:40:06,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 20:40:06,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 20:40:06,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 20:40:06,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 20:40:06,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 20:40:06,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 20:40:06,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 20:40:06,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 20:40:06,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 20:40:06,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 20:40:06,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 20:40:06,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 20:40:06,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 20:40:06,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 20:40:06,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 20:40:06,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 20:40:06,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 20:40:06,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 20:40:06,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 20:40:06,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 20:40:06,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 20:40:06,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 20:40:06,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 20:40:06,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 20:40:06,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 20:40:06,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 20:40:06,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 20:40:06,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 20:40:06,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 20:40:06,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 20:40:06,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 20:40:06,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 20:40:06,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2021-12-21 20:40:06,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 20:40:06,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 20:40:06,909 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 20:40:06,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 20:40:06,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 20:40:06,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 20:40:06,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 20:40:06,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 20:40:06,911 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 20:40:06,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 20:40:06,912 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 20:40:06,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 20:40:06,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 20:40:06,913 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 20:40:06,913 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 20:40:06,913 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 20:40:06,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 20:40:06,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 20:40:06,913 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 20:40:06,913 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 20:40:06,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 20:40:06,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 20:40:06,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 20:40:06,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 20:40:06,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:40:06,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 20:40:06,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 20:40:06,915 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 20:40:06,915 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 20:40:06,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 20:40:06,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 20:40:06,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de0fc62ae58e6d221c3194714bc6cea21909b72dd1b37b4566b87d84683f34c8 [2021-12-21 20:40:07,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 20:40:07,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 20:40:07,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 20:40:07,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 20:40:07,175 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 20:40:07,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/busybox-1.22.0/hostid.i [2021-12-21 20:40:07,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5a223b0/fc0c3315585c461abe7bb55b90ae3201/FLAGa8c060428 [2021-12-21 20:40:07,686 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 20:40:07,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/busybox-1.22.0/hostid.i [2021-12-21 20:40:07,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5a223b0/fc0c3315585c461abe7bb55b90ae3201/FLAGa8c060428 [2021-12-21 20:40:07,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d5a223b0/fc0c3315585c461abe7bb55b90ae3201 [2021-12-21 20:40:07,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 20:40:07,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 20:40:07,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 20:40:07,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 20:40:07,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 20:40:07,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:40:07" (1/1) ... [2021-12-21 20:40:07,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f545941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:07, skipping insertion in model container [2021-12-21 20:40:07,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:40:07" (1/1) ... [2021-12-21 20:40:07,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 20:40:07,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 20:40:08,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:40:08,369 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-21 20:40:08,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 20:40:08,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:40:08,451 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 20:40:08,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:40:08,603 INFO L208 MainTranslator]: Completed translation [2021-12-21 20:40:08,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08 WrapperNode [2021-12-21 20:40:08,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 20:40:08,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 20:40:08,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 20:40:08,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 20:40:08,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,651 INFO L137 Inliner]: procedures = 529, calls = 68, calls flagged for inlining = 7, calls inlined = 6, statements flattened = 137 [2021-12-21 20:40:08,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 20:40:08,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 20:40:08,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 20:40:08,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 20:40:08,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 20:40:08,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 20:40:08,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 20:40:08,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 20:40:08,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (1/1) ... [2021-12-21 20:40:08,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:40:08,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:40:08,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 20:40:08,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 20:40:08,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 20:40:08,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 20:40:08,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 20:40:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2021-12-21 20:40:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 20:40:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 20:40:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 20:40:08,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 20:40:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 20:40:08,729 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 20:40:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 20:40:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-21 20:40:08,927 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 20:40:08,928 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 20:40:09,320 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 20:40:09,325 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 20:40:09,326 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 20:40:09,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:40:09 BoogieIcfgContainer [2021-12-21 20:40:09,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 20:40:09,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 20:40:09,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 20:40:09,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 20:40:09,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 08:40:07" (1/3) ... [2021-12-21 20:40:09,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e62ef4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:40:09, skipping insertion in model container [2021-12-21 20:40:09,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:40:08" (2/3) ... [2021-12-21 20:40:09,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e62ef4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:40:09, skipping insertion in model container [2021-12-21 20:40:09,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:40:09" (3/3) ... [2021-12-21 20:40:09,351 INFO L111 eAbstractionObserver]: Analyzing ICFG hostid.i [2021-12-21 20:40:09,355 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 20:40:09,355 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2021-12-21 20:40:09,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 20:40:09,403 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 20:40:09,405 INFO L340 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2021-12-21 20:40:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 92 states have internal predecessors, (102), 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) [2021-12-21 20:40:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-21 20:40:09,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:09,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-21 20:40:09,446 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-21 20:40:09,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:09,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500005555] [2021-12-21 20:40:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:09,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:09,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:09,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:09,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 20:40:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 20:40:09,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:09,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 20:40:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:09,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:09,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:09,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500005555] [2021-12-21 20:40:09,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500005555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:09,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:09,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:40:09,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428570546] [2021-12-21 20:40:09,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:09,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 20:40:09,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:09,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 20:40:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:40:09,662 INFO L87 Difference]: Start difference. First operand has 95 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 92 states have internal predecessors, (102), 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) [2021-12-21 20:40:09,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:09,830 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-12-21 20:40:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 20:40:09,832 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 [2021-12-21 20:40:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:09,838 INFO L225 Difference]: With dead ends: 109 [2021-12-21 20:40:09,838 INFO L226 Difference]: Without dead ends: 107 [2021-12-21 20:40:09,839 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 [2021-12-21 20:40:09,841 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:09,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 88 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:40:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-21 20:40:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-12-21 20:40:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 88 states have internal predecessors, (93), 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) [2021-12-21 20:40:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-12-21 20:40:09,898 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 3 [2021-12-21 20:40:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:09,899 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-12-21 20:40:09,899 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) [2021-12-21 20:40:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-12-21 20:40:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-21 20:40:09,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:09,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-21 20:40:09,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:10,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:10,109 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-21 20:40:10,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:10,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351271881] [2021-12-21 20:40:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:10,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:10,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:10,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:10,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 20:40:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:10,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 20:40:10,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:10,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 20:40:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:10,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:10,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:10,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351271881] [2021-12-21 20:40:10,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351271881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:10,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:10,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:40:10,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737950406] [2021-12-21 20:40:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:10,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 20:40:10,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 20:40:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:40:10,258 INFO L87 Difference]: Start difference. First operand 91 states and 95 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) [2021-12-21 20:40:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:10,478 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2021-12-21 20:40:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 20:40:10,479 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 [2021-12-21 20:40:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:10,480 INFO L225 Difference]: With dead ends: 90 [2021-12-21 20:40:10,480 INFO L226 Difference]: Without dead ends: 90 [2021-12-21 20:40:10,480 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 [2021-12-21 20:40:10,481 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:10,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:40:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-21 20:40:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-21 20:40:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 87 states have internal predecessors, (92), 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) [2021-12-21 20:40:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-12-21 20:40:10,491 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 3 [2021-12-21 20:40:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:10,492 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-12-21 20:40:10,492 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) [2021-12-21 20:40:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-12-21 20:40:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 20:40:10,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:10,493 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 20:40:10,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:10,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:10,702 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:10,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2021-12-21 20:40:10,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:10,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944517093] [2021-12-21 20:40:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:10,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:10,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:10,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:10,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 20:40:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:10,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 20:40:10,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:10,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 20:40:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:10,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:10,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:10,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944517093] [2021-12-21 20:40:10,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944517093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:10,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:10,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:40:10,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316822026] [2021-12-21 20:40:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:10,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:40:10,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:10,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:40:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:40:10,900 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:40:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:11,143 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-12-21 20:40:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 20:40:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-21 20:40:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:11,144 INFO L225 Difference]: With dead ends: 94 [2021-12-21 20:40:11,145 INFO L226 Difference]: Without dead ends: 94 [2021-12-21 20:40:11,145 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 [2021-12-21 20:40:11,146 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:11,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:40:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-21 20:40:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-12-21 20:40:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 89 states have internal predecessors, (94), 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) [2021-12-21 20:40:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-12-21 20:40:11,151 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 6 [2021-12-21 20:40:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:11,151 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-12-21 20:40:11,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:40:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-12-21 20:40:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 20:40:11,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:11,152 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:40:11,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:11,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:11,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:11,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1261842348, now seen corresponding path program 1 times [2021-12-21 20:40:11,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:11,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444340252] [2021-12-21 20:40:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:11,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:11,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:11,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:11,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-21 20:40:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 20:40:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:11,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 20:40:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:11,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:40:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:12,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444340252] [2021-12-21 20:40:12,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444340252] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:40:12,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:40:12,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-21 20:40:12,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545220467] [2021-12-21 20:40:12,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:40:12,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 20:40:12,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 20:40:12,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:40:12,274 INFO L87 Difference]: Start difference. First operand 92 states and 96 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) [2021-12-21 20:40:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:13,560 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-12-21 20:40:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 20:40:13,561 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 [2021-12-21 20:40:13,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:13,562 INFO L225 Difference]: With dead ends: 98 [2021-12-21 20:40:13,562 INFO L226 Difference]: Without dead ends: 98 [2021-12-21 20:40:13,562 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 [2021-12-21 20:40:13,564 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 23 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:13,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 301 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 20:40:13,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-21 20:40:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-21 20:40:13,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.5873015873015872) internal successors, (100), 95 states have internal predecessors, (100), 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) [2021-12-21 20:40:13,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-12-21 20:40:13,568 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 10 [2021-12-21 20:40:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:13,569 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-12-21 20:40:13,569 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) [2021-12-21 20:40:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-12-21 20:40:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 20:40:13,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:13,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:40:13,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:13,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:13,780 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash -821954458, now seen corresponding path program 1 times [2021-12-21 20:40:13,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:13,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928052132] [2021-12-21 20:40:13,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:13,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:13,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:13,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:13,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-21 20:40:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 20:40:13,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:14,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:40:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:14,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:14,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928052132] [2021-12-21 20:40:14,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928052132] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:40:14,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:40:14,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-21 20:40:14,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602376164] [2021-12-21 20:40:14,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:40:14,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 20:40:14,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 20:40:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 20:40:14,121 INFO L87 Difference]: Start difference. First operand 98 states and 102 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) [2021-12-21 20:40:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:14,268 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-12-21 20:40:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 20:40:14,269 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 [2021-12-21 20:40:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:14,269 INFO L225 Difference]: With dead ends: 118 [2021-12-21 20:40:14,269 INFO L226 Difference]: Without dead ends: 118 [2021-12-21 20:40:14,269 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 [2021-12-21 20:40:14,270 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 27 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:14,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 624 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:40:14,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-21 20:40:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-12-21 20:40:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 115 states have internal predecessors, (120), 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) [2021-12-21 20:40:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-12-21 20:40:14,275 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 25 [2021-12-21 20:40:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:14,275 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-12-21 20:40:14,275 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) [2021-12-21 20:40:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-12-21 20:40:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 20:40:14,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:14,276 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:40:14,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:14,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:14,477 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:14,477 INFO L85 PathProgramCache]: Analyzing trace with hash -34072841, now seen corresponding path program 2 times [2021-12-21 20:40:14,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:14,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300023392] [2021-12-21 20:40:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:40:14,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:14,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:14,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:14,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-21 20:40:14,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 20:40:14,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:40:14,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 20:40:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:14,652 INFO L353 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-21 20:40:14,653 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 [2021-12-21 20:40:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 20:40:14,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:14,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:14,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300023392] [2021-12-21 20:40:14,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300023392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:14,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:14,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:40:14,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652622815] [2021-12-21 20:40:14,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:14,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 20:40:14,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 20:40:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:40:14,676 INFO L87 Difference]: Start difference. First operand 118 states and 122 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) [2021-12-21 20:40:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:14,842 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-12-21 20:40:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 20:40:14,842 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 [2021-12-21 20:40:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:14,843 INFO L225 Difference]: With dead ends: 129 [2021-12-21 20:40:14,843 INFO L226 Difference]: Without dead ends: 129 [2021-12-21 20:40:14,843 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 [2021-12-21 20:40:14,844 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 55 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:14,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 91 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:40:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-21 20:40:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2021-12-21 20:40:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.3855421686746987) internal successors, (115), 110 states have internal predecessors, (115), 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) [2021-12-21 20:40:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2021-12-21 20:40:14,849 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 45 [2021-12-21 20:40:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:14,849 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2021-12-21 20:40:14,849 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) [2021-12-21 20:40:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2021-12-21 20:40:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 20:40:14,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:14,850 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:40:14,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:15,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:15,057 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash -34072840, now seen corresponding path program 1 times [2021-12-21 20:40:15,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:15,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838578253] [2021-12-21 20:40:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:15,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:15,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:15,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-21 20:40:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:15,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 20:40:15,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:15,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:40:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:40:15,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838578253] [2021-12-21 20:40:15,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838578253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:40:15,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:40:15,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-21 20:40:15,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229374175] [2021-12-21 20:40:15,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:40:15,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 20:40:15,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 20:40:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-12-21 20:40:15,579 INFO L87 Difference]: Start difference. First operand 113 states and 117 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) [2021-12-21 20:40:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:16,155 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2021-12-21 20:40:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 20:40:16,156 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 [2021-12-21 20:40:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:16,157 INFO L225 Difference]: With dead ends: 121 [2021-12-21 20:40:16,157 INFO L226 Difference]: Without dead ends: 121 [2021-12-21 20:40:16,157 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 [2021-12-21 20:40:16,157 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 33 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:16,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 1241 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 20:40:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-21 20:40:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-21 20:40:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 118 states have internal predecessors, (123), 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) [2021-12-21 20:40:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2021-12-21 20:40:16,161 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 45 [2021-12-21 20:40:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:16,161 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2021-12-21 20:40:16,161 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) [2021-12-21 20:40:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2021-12-21 20:40:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 20:40:16,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:16,162 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:40:16,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-21 20:40:16,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:16,375 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:16,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2087093682, now seen corresponding path program 2 times [2021-12-21 20:40:16,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:16,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93733501] [2021-12-21 20:40:16,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:40:16,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:16,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:16,377 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:16,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-21 20:40:16,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 20:40:16,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:40:16,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 20:40:16,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:16,636 INFO L353 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-21 20:40:16,637 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 [2021-12-21 20:40:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:16,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:16,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93733501] [2021-12-21 20:40:16,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93733501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:16,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:16,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 20:40:16,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840949222] [2021-12-21 20:40:16,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 20:40:16,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 20:40:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:40:16,704 INFO L87 Difference]: Start difference. First operand 121 states and 125 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) [2021-12-21 20:40:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:17,038 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2021-12-21 20:40:17,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 20:40:17,038 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 [2021-12-21 20:40:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:17,039 INFO L225 Difference]: With dead ends: 161 [2021-12-21 20:40:17,039 INFO L226 Difference]: Without dead ends: 161 [2021-12-21 20:40:17,039 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 [2021-12-21 20:40:17,040 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 160 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:17,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 252 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 20:40:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-21 20:40:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2021-12-21 20:40:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 110 states have (on average 1.4) internal successors, (154), 136 states have internal predecessors, (154), 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) [2021-12-21 20:40:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 156 transitions. [2021-12-21 20:40:17,044 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 156 transitions. Word has length 53 [2021-12-21 20:40:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:17,045 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 156 transitions. [2021-12-21 20:40:17,045 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) [2021-12-21 20:40:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 156 transitions. [2021-12-21 20:40:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 20:40:17,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:17,046 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] [2021-12-21 20:40:17,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:17,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:17,259 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1633693263, now seen corresponding path program 1 times [2021-12-21 20:40:17,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:17,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688459528] [2021-12-21 20:40:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:17,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:17,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:17,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:17,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-21 20:40:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:17,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 20:40:17,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:17,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 20:40:17,683 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 [2021-12-21 20:40:17,689 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 11 treesize of output 9 [2021-12-21 20:40:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 20:40:17,915 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 [2021-12-21 20:40:17,926 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 20:40:17,926 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 [2021-12-21 20:40:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:17,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:17,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:17,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688459528] [2021-12-21 20:40:17,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688459528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:17,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:17,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 20:40:17,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930090992] [2021-12-21 20:40:17,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:17,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 20:40:17,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 20:40:17,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:40:17,989 INFO L87 Difference]: Start difference. First operand 139 states and 156 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) [2021-12-21 20:40:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:18,051 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2021-12-21 20:40:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 20:40:18,051 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 [2021-12-21 20:40:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:18,052 INFO L225 Difference]: With dead ends: 140 [2021-12-21 20:40:18,052 INFO L226 Difference]: Without dead ends: 140 [2021-12-21 20:40:18,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-21 20:40:18,053 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 5 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:18,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 385 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2021-12-21 20:40:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-21 20:40:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-12-21 20:40:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 111 states have (on average 1.3963963963963963) internal successors, (155), 137 states have internal predecessors, (155), 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) [2021-12-21 20:40:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2021-12-21 20:40:18,056 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 56 [2021-12-21 20:40:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:18,056 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2021-12-21 20:40:18,057 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) [2021-12-21 20:40:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2021-12-21 20:40:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 20:40:18,057 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:18,057 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] [2021-12-21 20:40:18,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-21 20:40:18,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:18,258 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash 895115800, now seen corresponding path program 1 times [2021-12-21 20:40:18,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:18,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053410834] [2021-12-21 20:40:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:18,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:18,260 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:18,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-21 20:40:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:18,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 20:40:18,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:18,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:18,510 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:18,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053410834] [2021-12-21 20:40:18,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053410834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:18,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:18,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:40:18,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178917395] [2021-12-21 20:40:18,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:18,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:40:18,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:18,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:40:18,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:40:18,511 INFO L87 Difference]: Start difference. First operand 140 states and 157 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) [2021-12-21 20:40:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:18,713 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2021-12-21 20:40:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 20:40:18,713 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 [2021-12-21 20:40:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:18,715 INFO L225 Difference]: With dead ends: 163 [2021-12-21 20:40:18,715 INFO L226 Difference]: Without dead ends: 163 [2021-12-21 20:40:18,715 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 [2021-12-21 20:40:18,716 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 74 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:18,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 134 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:40:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-21 20:40:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 139. [2021-12-21 20:40:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 111 states have (on average 1.3783783783783783) internal successors, (153), 136 states have internal predecessors, (153), 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) [2021-12-21 20:40:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2021-12-21 20:40:18,729 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 57 [2021-12-21 20:40:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:18,729 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2021-12-21 20:40:18,729 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) [2021-12-21 20:40:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2021-12-21 20:40:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 20:40:18,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:18,731 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] [2021-12-21 20:40:18,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:18,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:18,945 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:18,946 INFO L85 PathProgramCache]: Analyzing trace with hash 895115801, now seen corresponding path program 1 times [2021-12-21 20:40:18,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:18,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121076663] [2021-12-21 20:40:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:18,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:18,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:18,948 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:18,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-21 20:40:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:19,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 20:40:19,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:19,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:19,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:19,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121076663] [2021-12-21 20:40:19,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121076663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:19,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:19,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 20:40:19,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891070621] [2021-12-21 20:40:19,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:19,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 20:40:19,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:19,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 20:40:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:40:19,282 INFO L87 Difference]: Start difference. First operand 139 states and 155 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) [2021-12-21 20:40:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:19,476 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-12-21 20:40:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 20:40:19,477 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 [2021-12-21 20:40:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:19,478 INFO L225 Difference]: With dead ends: 143 [2021-12-21 20:40:19,478 INFO L226 Difference]: Without dead ends: 143 [2021-12-21 20:40:19,478 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 [2021-12-21 20:40:19,478 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 119 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:19,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 258 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:40:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-21 20:40:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 121. [2021-12-21 20:40:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.3225806451612903) internal successors, (123), 118 states have internal predecessors, (123), 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) [2021-12-21 20:40:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2021-12-21 20:40:19,481 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 57 [2021-12-21 20:40:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:19,481 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2021-12-21 20:40:19,481 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) [2021-12-21 20:40:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2021-12-21 20:40:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 20:40:19,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:19,482 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] [2021-12-21 20:40:19,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:19,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:19,682 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:19,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1978804018, now seen corresponding path program 1 times [2021-12-21 20:40:19,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:19,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860620134] [2021-12-21 20:40:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:19,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:19,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:19,684 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:19,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-21 20:40:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 20:40:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:19,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:19,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:19,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860620134] [2021-12-21 20:40:19,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860620134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:19,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:19,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:40:19,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826065600] [2021-12-21 20:40:19,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:19,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:40:19,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:40:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:40:19,993 INFO L87 Difference]: Start difference. First operand 121 states and 125 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) [2021-12-21 20:40:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:20,287 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-12-21 20:40:20,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:40:20,288 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 [2021-12-21 20:40:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:20,288 INFO L225 Difference]: With dead ends: 139 [2021-12-21 20:40:20,288 INFO L226 Difference]: Without dead ends: 139 [2021-12-21 20:40:20,288 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 [2021-12-21 20:40:20,289 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 89 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:20,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 197 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 20:40:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-21 20:40:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2021-12-21 20:40:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 129 states have internal predecessors, (141), 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) [2021-12-21 20:40:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 143 transitions. [2021-12-21 20:40:20,291 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 143 transitions. Word has length 58 [2021-12-21 20:40:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:20,292 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 143 transitions. [2021-12-21 20:40:20,292 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) [2021-12-21 20:40:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 143 transitions. [2021-12-21 20:40:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 20:40:20,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:20,292 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] [2021-12-21 20:40:20,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:20,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:20,493 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1213382400, now seen corresponding path program 1 times [2021-12-21 20:40:20,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:20,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101129702] [2021-12-21 20:40:20,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:20,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:20,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:20,495 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:20,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-21 20:40:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:20,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 20:40:20,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:20,905 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-21 20:40:20,905 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 [2021-12-21 20:40:20,925 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-21 20:40:20,925 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 [2021-12-21 20:40:21,132 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 20:40:21,132 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 17 treesize of output 23 [2021-12-21 20:40:21,177 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 20:40:21,177 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 [2021-12-21 20:40:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:21,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:21,376 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:21,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101129702] [2021-12-21 20:40:21,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101129702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:21,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:21,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 20:40:21,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640421456] [2021-12-21 20:40:21,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:21,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 20:40:21,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 20:40:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:40:21,378 INFO L87 Difference]: Start difference. First operand 132 states and 143 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) [2021-12-21 20:40:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:21,499 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-12-21 20:40:21,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 20:40:21,499 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 [2021-12-21 20:40:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:21,500 INFO L225 Difference]: With dead ends: 132 [2021-12-21 20:40:21,500 INFO L226 Difference]: Without dead ends: 132 [2021-12-21 20:40:21,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 20:40:21,501 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:21,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 379 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 76 Unchecked, 0.0s Time] [2021-12-21 20:40:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-21 20:40:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-12-21 20:40:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 129 states have internal predecessors, (140), 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) [2021-12-21 20:40:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2021-12-21 20:40:21,503 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 59 [2021-12-21 20:40:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:21,503 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2021-12-21 20:40:21,503 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) [2021-12-21 20:40:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2021-12-21 20:40:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 20:40:21,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:21,504 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] [2021-12-21 20:40:21,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:21,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:21,712 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:21,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1213382399, now seen corresponding path program 1 times [2021-12-21 20:40:21,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:21,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824657958] [2021-12-21 20:40:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:21,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:21,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:21,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:21,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-21 20:40:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:22,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 20:40:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:22,180 INFO L353 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-21 20:40:22,180 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 [2021-12-21 20:40:22,214 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-21 20:40:22,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-12-21 20:40:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:22,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:22,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:22,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824657958] [2021-12-21 20:40:22,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824657958] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:22,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:22,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:40:22,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182487] [2021-12-21 20:40:22,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:22,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:40:22,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:22,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:40:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:40:22,244 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2021-12-21 20:40:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:22,450 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2021-12-21 20:40:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 20:40:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 [2021-12-21 20:40:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:22,451 INFO L225 Difference]: With dead ends: 139 [2021-12-21 20:40:22,451 INFO L226 Difference]: Without dead ends: 139 [2021-12-21 20:40:22,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:40:22,452 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 46 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:22,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 137 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:40:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-21 20:40:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2021-12-21 20:40:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 133 states have internal predecessors, (147), 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) [2021-12-21 20:40:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 149 transitions. [2021-12-21 20:40:22,454 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 149 transitions. Word has length 59 [2021-12-21 20:40:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:22,454 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 149 transitions. [2021-12-21 20:40:22,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2021-12-21 20:40:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 149 transitions. [2021-12-21 20:40:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 20:40:22,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:22,455 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] [2021-12-21 20:40:22,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:22,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:22,669 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:22,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1430304375, now seen corresponding path program 1 times [2021-12-21 20:40:22,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:22,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692701907] [2021-12-21 20:40:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:22,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:22,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:22,671 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:22,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-21 20:40:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 20:40:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:23,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 20:40:23,136 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 [2021-12-21 20:40:23,264 INFO L353 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-12-21 20:40:23,265 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 [2021-12-21 20:40:23,401 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 [2021-12-21 20:40:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:23,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:23,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692701907] [2021-12-21 20:40:23,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692701907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:23,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:23,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 20:40:23,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058627066] [2021-12-21 20:40:23,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:23,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 20:40:23,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:23,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 20:40:23,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:40:23,413 INFO L87 Difference]: Start difference. First operand 136 states and 149 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) [2021-12-21 20:40:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:23,739 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2021-12-21 20:40:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 20:40:23,739 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 [2021-12-21 20:40:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:23,740 INFO L225 Difference]: With dead ends: 134 [2021-12-21 20:40:23,740 INFO L226 Difference]: Without dead ends: 134 [2021-12-21 20:40:23,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 20:40:23,741 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 70 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:23,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 205 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 20:40:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-21 20:40:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-12-21 20:40:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 110 states have (on average 1.3) internal successors, (143), 131 states have internal predecessors, (143), 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) [2021-12-21 20:40:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2021-12-21 20:40:23,743 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 62 [2021-12-21 20:40:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:23,743 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2021-12-21 20:40:23,744 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) [2021-12-21 20:40:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2021-12-21 20:40:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 20:40:23,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:23,744 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] [2021-12-21 20:40:23,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:23,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:23,961 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1430304376, now seen corresponding path program 1 times [2021-12-21 20:40:23,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:23,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650709311] [2021-12-21 20:40:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:23,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:23,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:23,963 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:23,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-21 20:40:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 20:40:24,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:24,446 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 11 treesize of output 9 [2021-12-21 20:40:24,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 20:40:24,497 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 [2021-12-21 20:40:24,510 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 [2021-12-21 20:40:24,601 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 [2021-12-21 20:40:24,609 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 [2021-12-21 20:40:24,675 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 [2021-12-21 20:40:24,678 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 [2021-12-21 20:40:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:24,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:24,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:24,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650709311] [2021-12-21 20:40:24,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650709311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:24,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:24,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 20:40:24,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863211489] [2021-12-21 20:40:24,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:24,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 20:40:24,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:24,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 20:40:24,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 20:40:24,710 INFO L87 Difference]: Start difference. First operand 134 states and 145 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) [2021-12-21 20:40:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:25,215 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-12-21 20:40:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:40:25,217 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 [2021-12-21 20:40:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:25,218 INFO L225 Difference]: With dead ends: 133 [2021-12-21 20:40:25,218 INFO L226 Difference]: Without dead ends: 133 [2021-12-21 20:40:25,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-21 20:40:25,219 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 72 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:25,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 204 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 20:40:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-21 20:40:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-12-21 20:40:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 130 states have internal predecessors, (141), 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) [2021-12-21 20:40:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-12-21 20:40:25,221 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 62 [2021-12-21 20:40:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:25,221 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-12-21 20:40:25,221 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) [2021-12-21 20:40:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-12-21 20:40:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 20:40:25,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:25,221 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] [2021-12-21 20:40:25,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:25,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:25,430 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1064372062, now seen corresponding path program 1 times [2021-12-21 20:40:25,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:25,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319848351] [2021-12-21 20:40:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:25,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:25,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:25,435 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:25,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-21 20:40:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:25,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 20:40:25,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:25,974 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 11 treesize of output 9 [2021-12-21 20:40:26,021 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-21 20:40:26,022 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 [2021-12-21 20:40:26,074 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 [2021-12-21 20:40:26,166 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 [2021-12-21 20:40:26,278 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 20:40:26,279 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 [2021-12-21 20:40:26,314 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 [2021-12-21 20:40:26,389 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:26,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:26,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:26,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319848351] [2021-12-21 20:40:26,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319848351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:26,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:26,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 20:40:26,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065435364] [2021-12-21 20:40:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:26,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 20:40:26,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 20:40:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:40:26,391 INFO L87 Difference]: Start difference. First operand 133 states and 143 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) [2021-12-21 20:40:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:27,073 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2021-12-21 20:40:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 20:40:27,073 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 [2021-12-21 20:40:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:27,074 INFO L225 Difference]: With dead ends: 154 [2021-12-21 20:40:27,074 INFO L226 Difference]: Without dead ends: 154 [2021-12-21 20:40:27,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-21 20:40:27,075 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 98 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:27,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 244 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 177 Invalid, 0 Unknown, 51 Unchecked, 0.6s Time] [2021-12-21 20:40:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-21 20:40:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2021-12-21 20:40:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 119 states have (on average 1.3109243697478992) internal successors, (156), 139 states have internal predecessors, (156), 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) [2021-12-21 20:40:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2021-12-21 20:40:27,078 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 66 [2021-12-21 20:40:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:27,078 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2021-12-21 20:40:27,078 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) [2021-12-21 20:40:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2021-12-21 20:40:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 20:40:27,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:27,079 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] [2021-12-21 20:40:27,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:27,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:27,294 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:27,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1064372061, now seen corresponding path program 1 times [2021-12-21 20:40:27,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543751136] [2021-12-21 20:40:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:27,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:27,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:27,296 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:27,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-21 20:40:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 20:40:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:27,817 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 11 treesize of output 9 [2021-12-21 20:40:27,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 20:40:27,863 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 20:40:27,864 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 [2021-12-21 20:40:27,891 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 [2021-12-21 20:40:27,906 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 [2021-12-21 20:40:28,016 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 [2021-12-21 20:40:28,031 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 [2021-12-21 20:40:28,157 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 20:40:28,157 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 [2021-12-21 20:40:28,164 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 [2021-12-21 20:40:28,252 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 [2021-12-21 20:40:28,255 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 [2021-12-21 20:40:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 20:40:28,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:40:28,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543751136] [2021-12-21 20:40:28,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543751136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:40:28,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:40:28,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 20:40:28,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23917473] [2021-12-21 20:40:28,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:40:28,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 20:40:28,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:28,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 20:40:28,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 20:40:28,279 INFO L87 Difference]: Start difference. First operand 142 states and 158 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) [2021-12-21 20:40:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:28,939 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2021-12-21 20:40:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 20:40:28,940 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 [2021-12-21 20:40:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:28,940 INFO L225 Difference]: With dead ends: 154 [2021-12-21 20:40:28,940 INFO L226 Difference]: Without dead ends: 154 [2021-12-21 20:40:28,941 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 [2021-12-21 20:40:28,944 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 104 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:28,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 210 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 20:40:28,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-21 20:40:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 142. [2021-12-21 20:40:28,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 139 states have internal predecessors, (152), 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) [2021-12-21 20:40:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-12-21 20:40:28,947 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 66 [2021-12-21 20:40:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:28,948 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-12-21 20:40:28,948 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) [2021-12-21 20:40:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-12-21 20:40:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 20:40:28,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:28,948 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] [2021-12-21 20:40:28,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:29,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:29,155 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1328353215, now seen corresponding path program 1 times [2021-12-21 20:40:29,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:29,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049041031] [2021-12-21 20:40:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:29,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:29,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:29,158 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:29,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-21 20:40:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 20:40:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:29,818 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 11 treesize of output 9 [2021-12-21 20:40:29,859 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-21 20:40:29,859 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 [2021-12-21 20:40:29,886 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 [2021-12-21 20:40:29,973 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 [2021-12-21 20:40:30,065 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 20:40:30,065 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 [2021-12-21 20:40:30,156 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 20:40:30,157 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 [2021-12-21 20:40:30,196 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 [2021-12-21 20:40:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-21 20:40:30,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:40:30,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse0 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0) v_ArrVal_1323) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse0))) (_ bv1 1))) is different from false [2021-12-21 20:40:30,487 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1322 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem125#1.base| v_ArrVal_1322))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1323)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-21 20:40:30,503 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1322 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1322))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1323)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-21 20:40:30,528 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1322 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1321 (Array (_ BitVec 64) (_ BitVec 64)))) (= (select |c_#valid| (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1321))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1322)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_1323)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (_ bv1 1))) is different from false [2021-12-21 20:40:30,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 20:40:30,556 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 [2021-12-21 20:40:30,561 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 [2021-12-21 20:40:30,580 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 2024 [2021-12-21 20:40:30,590 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 2024 treesize of output 1548 [2021-12-21 20:40:30,600 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 [2021-12-21 20:40:53,179 INFO L353 Elim1Store]: treesize reduction -11, result has 113.6 percent of original size [2021-12-21 20:40:53,179 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 [2021-12-21 20:40:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 190 trivial. 2 not checked. [2021-12-21 20:40:53,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:40:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049041031] [2021-12-21 20:40:53,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049041031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:40:53,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:40:53,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-12-21 20:40:53,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103967364] [2021-12-21 20:40:53,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:40:53,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 20:40:53,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:40:53,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 20:40:53,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=161, Unknown=10, NotChecked=116, Total=342 [2021-12-21 20:40:53,931 INFO L87 Difference]: Start difference. First operand 142 states and 154 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) [2021-12-21 20:40:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:40:54,950 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2021-12-21 20:40:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 20:40:54,950 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 [2021-12-21 20:40:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:40:54,951 INFO L225 Difference]: With dead ends: 150 [2021-12-21 20:40:54,951 INFO L226 Difference]: Without dead ends: 150 [2021-12-21 20:40:54,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=97, Invalid=251, Unknown=10, NotChecked=148, Total=506 [2021-12-21 20:40:54,952 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 165 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:40:54,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 360 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 467 Unchecked, 0.5s Time] [2021-12-21 20:40:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-21 20:40:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 141. [2021-12-21 20:40:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 138 states have internal predecessors, (150), 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) [2021-12-21 20:40:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2021-12-21 20:40:54,955 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 71 [2021-12-21 20:40:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:40:54,955 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2021-12-21 20:40:54,955 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) [2021-12-21 20:40:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2021-12-21 20:40:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 20:40:54,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:40:54,956 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] [2021-12-21 20:40:54,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-21 20:40:55,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 20:40:55,164 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 33 more)] === [2021-12-21 20:40:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:40:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1328353214, now seen corresponding path program 1 times [2021-12-21 20:40:55,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 20:40:55,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452021314] [2021-12-21 20:40:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:40:55,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 20:40:55,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 20:40:55,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-21 20:40:55,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-21 20:40:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:40:55,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 20:40:55,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:40:55,815 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 11 treesize of output 9 [2021-12-21 20:40:55,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 20:40:55,856 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 20:40:55,856 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 [2021-12-21 20:40:55,882 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 [2021-12-21 20:40:55,895 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 [2021-12-21 20:40:55,978 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 [2021-12-21 20:40:55,985 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 [2021-12-21 20:40:56,108 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 20:40:56,108 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 [2021-12-21 20:40:56,114 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 [2021-12-21 20:40:56,275 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 20:40:56,276 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 [2021-12-21 20:40:56,282 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 [2021-12-21 20:40:56,397 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 [2021-12-21 20:40:56,401 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 [2021-12-21 20:40:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-21 20:40:56,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:40:57,804 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem127#1.base| v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (.cse1 ((_ sign_extend 32) (bvadd |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32))))) (bvule (bvadd .cse0 .cse1) (bvadd .cse0 (_ bv1 64) .cse1)))) (forall ((v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1441 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem127#1.base| v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2) (_ bv1 64) ((_ sign_extend 32) (bvadd |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32)))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem127#1.base| v_ArrVal_1441) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2)))))) is different from false [2021-12-21 20:40:57,913 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (let ((.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2) v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2))) (.cse1 ((_ sign_extend 32) (bvadd |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32))))) (bvule (bvadd .cse0 .cse1) (bvadd (_ bv1 64) .cse0 .cse1)))) (forall ((v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1441 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse4 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))) (bvule (bvadd (_ bv1 64) (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4) ((_ sign_extend 32) (bvadd |c_ULTIMATE.start_main_~j~0#1| (_ bv1 32)))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1441) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))))))) is different from false [2021-12-21 20:40:58,044 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1441 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse1 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) (bvule (bvadd ((_ sign_extend 32) (_ bv1 32)) (_ bv1 64) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1441) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1)))))) (forall ((v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse2 ((_ sign_extend 32) (_ bv1 32))) (.cse3 (let ((.cse4 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4) v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4)))) (bvule (bvadd .cse2 .cse3) (bvadd .cse2 (_ bv1 64) .cse3))))) is different from false [2021-12-21 20:40:58,134 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1439 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1440 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (let ((.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem125#1.base| v_ArrVal_1439) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem125#1.base| v_ArrVal_1440) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2) v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2))) (.cse1 ((_ sign_extend 32) (_ bv1 32)))) (bvule (bvadd .cse0 .cse1) (bvadd .cse0 .cse1 (_ bv1 64))))) (forall ((v_ArrVal_1439 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1440 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1441 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem125#1.base| v_ArrVal_1440)) (.cse4 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse3 (select (select .cse5 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem125#1.base| v_ArrVal_1439) .cse3 v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4) ((_ sign_extend 32) (_ bv1 32)) (_ bv1 64)) (select |c_#length| (select (select (store .cse5 .cse3 v_ArrVal_1441) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse4))))))) is different from false [2021-12-21 20:40:58,306 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1439 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1440 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 ((_ sign_extend 32) (_ bv1 32))) (.cse1 (let ((.cse3 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse3))) (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_1439) (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_1440) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse3) v_ArrVal_1442)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse3)))) (bvule (bvadd .cse0 .cse1) (bvadd .cse0 (_ bv1 64) .cse1)))) (forall ((v_ArrVal_1439 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1440 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1441 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse6 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse6))) (let ((.cse7 (store |c_#memory_$Pointer$.base| .cse4 v_ArrVal_1440))) (let ((.cse5 (select (select .cse7 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse6))) (bvule (bvadd ((_ sign_extend 32) (_ bv1 32)) (_ bv1 64) (select (select (store (store |c_#memory_$Pointer$.offset| .cse4 v_ArrVal_1439) .cse5 v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse6)) (select |c_#length| (select (select (store .cse7 .cse5 v_ArrVal_1441) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse6))))))))) is different from false [2021-12-21 20:40:58,831 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1437 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1439 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1438 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1440 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1441 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1437)) (.cse2 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (let ((.cse0 (select (select .cse4 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2))) (let ((.cse3 (store .cse4 .cse0 v_ArrVal_1440))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2))) (bvule (bvadd ((_ sign_extend 32) (_ bv1 32)) (_ bv1 64) (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1438) .cse0 v_ArrVal_1439) .cse1 v_ArrVal_1442) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_1441) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse2)))))))) (forall ((v_ArrVal_1437 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1439 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1438 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1440 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1442 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse5 ((_ sign_extend 32) (_ bv1 32))) (.cse6 (let ((.cse9 (bvadd (bvmul (_ bv8 64) ((_ sign_extend 32) |c_ULTIMATE.start_main_~i~4#1|)) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1437))) (let ((.cse7 (select (select .cse8 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse9))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_1438) .cse7 v_ArrVal_1439) (select (select (store .cse8 .cse7 v_ArrVal_1440) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse9) v_ArrVal_1442))) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse9)))) (bvule (bvadd .cse5 .cse6) (bvadd .cse5 (_ bv1 64) .cse6))))) is different from false [2021-12-21 20:40:58,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 20:40:58,916 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 228 treesize of output 216 [2021-12-21 20:40:58,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 20:40:58,950 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 202 treesize of output 138 [2021-12-21 20:40:58,959 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 1481 treesize of output 1238 [2021-12-21 20:40:58,970 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 6771 treesize of output 6366 [2021-12-21 20:40:58,992 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 6362 treesize of output 5690 [2021-12-21 20:40:59,005 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 5690 treesize of output 5382 [2021-12-21 20:40:59,017 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 5382 treesize of output 4878 [2021-12-21 20:40:59,028 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 4878 treesize of output 3758 [2021-12-21 20:40:59,041 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 3758 treesize of output 3268 [2021-12-21 20:41:16,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 20:41:16,524 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 228 [2021-12-21 20:41:16,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 20:41:16,564 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 137 [2021-12-21 20:41:16,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 20:41:16,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1227 treesize of output 768 [2021-12-21 20:41:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 20:41:16,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 20:41:16,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 963 treesize of output 810 [2021-12-21 20:41:16,613 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 806 treesize of output 722 [2021-12-21 20:41:16,625 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 722 treesize of output 526 [2021-12-21 20:41:16,635 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 526 treesize of output 470 [2021-12-21 20:41:17,105 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 20:41:17,106 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 13 treesize of output 12 [2021-12-21 20:41:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 3 not checked. [2021-12-21 20:41:17,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 20:41:17,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452021314] [2021-12-21 20:41:17,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452021314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:41:17,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:41:17,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-12-21 20:41:17,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690113784] [2021-12-21 20:41:17,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:41:17,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 20:41:17,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 20:41:17,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 20:41:17,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=260, Unknown=6, NotChecked=222, Total=552 [2021-12-21 20:41:17,155 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 24 states have internal predecessors, (57), 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)