./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/ldv-memsafety/memleaks_test10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:20:54,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:20:54,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:20:54,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:20:54,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:20:54,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:20:54,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:20:54,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:20:54,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:20:54,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:20:54,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:20:54,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:20:54,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:20:54,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:20:54,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:20:54,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:20:54,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:20:54,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:20:54,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:20:54,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:20:54,471 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:20:54,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:20:54,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:20:54,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:20:54,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:20:54,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:20:54,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:20:54,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:20:54,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:20:54,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:20:54,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:20:54,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:20:54,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:20:54,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:20:54,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:20:54,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:20:54,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:20:54,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:20:54,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:20:54,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:20:54,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:20:54,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:20:54,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:20:54,532 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:20:54,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:20:54,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:20:54,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:20:54,534 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:20:54,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:20:54,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:20:54,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:20:54,535 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:20:54,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:20:54,537 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:20:54,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:20:54,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:20:54,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:20:54,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:20:54,538 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:20:54,538 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:20:54,538 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:20:54,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:20:54,538 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:20:54,539 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:20:54,539 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:20:54,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:20:54,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:20:54,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:20:54,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:20:54,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:20:54,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:20:54,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:20:54,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:20:54,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 [2022-07-21 17:20:54,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:20:54,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:20:54,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:20:54,847 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:20:54,848 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:20:54,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2022-07-21 17:20:54,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44aafcca9/45d0cef04f8f4c068c7b28f5100ea3cf/FLAGc5f2ccb0d [2022-07-21 17:20:55,378 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:20:55,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2022-07-21 17:20:55,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44aafcca9/45d0cef04f8f4c068c7b28f5100ea3cf/FLAGc5f2ccb0d [2022-07-21 17:20:55,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44aafcca9/45d0cef04f8f4c068c7b28f5100ea3cf [2022-07-21 17:20:55,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:20:55,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:20:55,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:20:55,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:20:55,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:20:55,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:55" (1/1) ... [2022-07-21 17:20:55,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@288f5844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:55, skipping insertion in model container [2022-07-21 17:20:55,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:55" (1/1) ... [2022-07-21 17:20:55,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:20:55,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:20:56,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:20:56,137 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-21 17:20:56,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ef3572f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:56, skipping insertion in model container [2022-07-21 17:20:56,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:20:56,138 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-21 17:20:56,140 INFO L158 Benchmark]: Toolchain (without parser) took 412.15ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.2MB in the beginning and 47.7MB in the end (delta: -22.5MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2022-07-21 17:20:56,140 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 32.1MB in the beginning and 32.1MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:20:56,141 INFO L158 Benchmark]: CACSL2BoogieTranslator took 410.32ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.0MB in the beginning and 47.7MB in the end (delta: -22.8MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2022-07-21 17:20:56,143 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 50.3MB. Free memory was 32.1MB in the beginning and 32.1MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 410.32ms. Allocated memory was 50.3MB in the beginning and 67.1MB in the end (delta: 16.8MB). Free memory was 25.0MB in the beginning and 47.7MB in the end (delta: -22.8MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/ldv-memsafety/memleaks_test10-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:20:57,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:20:57,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:20:57,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:20:57,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:20:57,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:20:57,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:20:57,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:20:57,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:20:57,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:20:57,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:20:57,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:20:57,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:20:57,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:20:57,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:20:57,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:20:57,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:20:57,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:20:57,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:20:57,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:20:57,805 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:20:57,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:20:57,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:20:57,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:20:57,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:20:57,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:20:57,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:20:57,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:20:57,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:20:57,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:20:57,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:20:57,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:20:57,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:20:57,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:20:57,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:20:57,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:20:57,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:20:57,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:20:57,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:20:57,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:20:57,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:20:57,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:20:57,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:20:57,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:20:57,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:20:57,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:20:57,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:20:57,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:20:57,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:20:57,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:20:57,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:20:57,865 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:20:57,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:20:57,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:20:57,866 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:20:57,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:20:57,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:20:57,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:20:57,867 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:20:57,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:20:57,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:20:57,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:20:57,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:20:57,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:20:57,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:20:57,868 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:20:57,868 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:20:57,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:20:57,868 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 [2022-07-21 17:20:58,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:20:58,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:20:58,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:20:58,208 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:20:58,209 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:20:58,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2022-07-21 17:20:58,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45408b5ac/f6989473993c43a484af91ba800e80fd/FLAG9792f4fb0 [2022-07-21 17:20:58,836 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:20:58,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2022-07-21 17:20:58,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45408b5ac/f6989473993c43a484af91ba800e80fd/FLAG9792f4fb0 [2022-07-21 17:20:59,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45408b5ac/f6989473993c43a484af91ba800e80fd [2022-07-21 17:20:59,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:20:59,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:20:59,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:20:59,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:20:59,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:20:59,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1289c1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59, skipping insertion in model container [2022-07-21 17:20:59,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:20:59,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:20:59,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:20:59,525 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 17:20:59,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:20:59,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:20:59,622 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:20:59,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:20:59,695 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:20:59,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59 WrapperNode [2022-07-21 17:20:59,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:20:59,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:20:59,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:20:59,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:20:59,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,740 INFO L137 Inliner]: procedures = 167, calls = 92, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 78 [2022-07-21 17:20:59,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:20:59,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:20:59,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:20:59,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:20:59,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:20:59,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:20:59,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:20:59,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:20:59,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (1/1) ... [2022-07-21 17:20:59,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:20:59,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:59,833 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) [2022-07-21 17:20:59,851 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 [2022-07-21 17:20:59,867 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-21 17:20:59,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-21 17:20:59,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:20:59,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:20:59,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:20:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:20:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:20:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 17:20:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:20:59,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:20:59,957 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:20:59,958 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:21:00,355 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:21:00,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:21:00,361 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 17:21:00,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:21:00 BoogieIcfgContainer [2022-07-21 17:21:00,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:21:00,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:21:00,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:21:00,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:21:00,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:20:59" (1/3) ... [2022-07-21 17:21:00,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b34d08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:21:00, skipping insertion in model container [2022-07-21 17:21:00,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:59" (2/3) ... [2022-07-21 17:21:00,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b34d08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:21:00, skipping insertion in model container [2022-07-21 17:21:00,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:21:00" (3/3) ... [2022-07-21 17:21:00,370 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test10-2.i [2022-07-21 17:21:00,383 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:21:00,383 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2022-07-21 17:21:00,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:21:00,454 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1824ee8c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@30573ae8 [2022-07-21 17:21:00,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-07-21 17:21:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 87 states have internal predecessors, (91), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:21:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:21:00,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:00,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:00,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1192529059, now seen corresponding path program 1 times [2022-07-21 17:21:00,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:00,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192104698] [2022-07-21 17:21:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:00,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:00,493 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) [2022-07-21 17:21:00,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:21:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:21:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:21:00,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:21:00,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:00,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192104698] [2022-07-21 17:21:00,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192104698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:21:00,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:21:00,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:21:00,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296302383] [2022-07-21 17:21:00,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:21:00,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:21:00,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:21:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:21:00,695 INFO L87 Difference]: Start difference. First operand has 93 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 87 states have internal predecessors, (91), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-07-21 17:21:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:00,942 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2022-07-21 17:21:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:21:00,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2022-07-21 17:21:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:00,956 INFO L225 Difference]: With dead ends: 180 [2022-07-21 17:21:00,956 INFO L226 Difference]: Without dead ends: 176 [2022-07-21 17:21:00,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:21:00,969 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 83 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:00,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 485 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:21:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-21 17:21:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 95. [2022-07-21 17:21:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 46 states have (on average 2.0) internal successors, (92), 88 states have internal predecessors, (92), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-21 17:21:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2022-07-21 17:21:01,028 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 11 [2022-07-21 17:21:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:01,029 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2022-07-21 17:21:01,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-07-21 17:21:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2022-07-21 17:21:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:21:01,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:01,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:01,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:01,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:01,241 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2080032740, now seen corresponding path program 1 times [2022-07-21 17:21:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:01,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875077020] [2022-07-21 17:21:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:01,244 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) [2022-07-21 17:21:01,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:21:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:01,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:21:01,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:21:01,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:21:01,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:01,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875077020] [2022-07-21 17:21:01,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875077020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:21:01,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:21:01,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:21:01,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927699498] [2022-07-21 17:21:01,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:21:01,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:21:01,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:21:01,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:21:01,337 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-07-21 17:21:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:01,594 INFO L93 Difference]: Finished difference Result 163 states and 179 transitions. [2022-07-21 17:21:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:21:01,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2022-07-21 17:21:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:01,597 INFO L225 Difference]: With dead ends: 163 [2022-07-21 17:21:01,597 INFO L226 Difference]: Without dead ends: 161 [2022-07-21 17:21:01,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:21:01,598 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 63 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:01,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 281 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:21:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-21 17:21:01,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2022-07-21 17:21:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 43 states have (on average 2.046511627906977) internal successors, (88), 85 states have internal predecessors, (88), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:21:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-07-21 17:21:01,607 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 11 [2022-07-21 17:21:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:01,608 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-07-21 17:21:01,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-07-21 17:21:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-07-21 17:21:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:21:01,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:01,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:01,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:01,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:01,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:01,811 INFO L85 PathProgramCache]: Analyzing trace with hash -895923568, now seen corresponding path program 1 times [2022-07-21 17:21:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:01,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110355390] [2022-07-21 17:21:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:01,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:01,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:01,813 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) [2022-07-21 17:21:01,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:21:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:21:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:01,895 INFO L390 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 [2022-07-21 17:21:01,984 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:21:01,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 17:21:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:21:01,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:21:02,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:02,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110355390] [2022-07-21 17:21:02,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110355390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:02,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:21:02,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-21 17:21:02,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537484747] [2022-07-21 17:21:02,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:02,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:21:02,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:21:02,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:21:02,153 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:21:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:02,490 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-07-21 17:21:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:21:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2022-07-21 17:21:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:02,492 INFO L225 Difference]: With dead ends: 129 [2022-07-21 17:21:02,493 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 17:21:02,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:21:02,494 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 65 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:02,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 336 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 297 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-07-21 17:21:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 17:21:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2022-07-21 17:21:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 93 states have internal predecessors, (104), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-21 17:21:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-07-21 17:21:02,510 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 15 [2022-07-21 17:21:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:02,511 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-07-21 17:21:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:21:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-07-21 17:21:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:21:02,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:02,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:02,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:02,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:02,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash -895923567, now seen corresponding path program 1 times [2022-07-21 17:21:02,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:02,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233614077] [2022-07-21 17:21:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:02,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:02,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:02,732 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) [2022-07-21 17:21:02,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:21:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:02,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:21:02,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:02,803 INFO L390 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 [2022-07-21 17:21:06,990 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:21:06,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:21:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:21:07,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:07,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:07,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233614077] [2022-07-21 17:21:07,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233614077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:07,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2056056089] [2022-07-21 17:21:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:07,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:21:07,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:21:07,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:21:07,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-07-21 17:21:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:07,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:21:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:07,505 INFO L390 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 [2022-07-21 17:21:07,512 INFO L390 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 [2022-07-21 17:21:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:21:09,792 INFO L390 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 12 treesize of output 14 [2022-07-21 17:21:09,805 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:21:09,805 INFO L390 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 12 treesize of output 12 [2022-07-21 17:21:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:21:09,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2056056089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:13,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:21:13,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-21 17:21:13,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553539880] [2022-07-21 17:21:13,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:13,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:21:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:13,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:21:13,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=225, Unknown=4, NotChecked=0, Total=272 [2022-07-21 17:21:13,470 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:21:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:16,630 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2022-07-21 17:21:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 17:21:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2022-07-21 17:21:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:16,633 INFO L225 Difference]: With dead ends: 177 [2022-07-21 17:21:16,633 INFO L226 Difference]: Without dead ends: 177 [2022-07-21 17:21:16,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=56, Invalid=281, Unknown=5, NotChecked=0, Total=342 [2022-07-21 17:21:16,634 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 135 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:16,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 598 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 567 Invalid, 0 Unknown, 156 Unchecked, 1.0s Time] [2022-07-21 17:21:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-21 17:21:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 137. [2022-07-21 17:21:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 87 states have (on average 1.9195402298850575) internal successors, (167), 126 states have internal predecessors, (167), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (14), 9 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-21 17:21:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 188 transitions. [2022-07-21 17:21:16,645 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 188 transitions. Word has length 15 [2022-07-21 17:21:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:16,645 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 188 transitions. [2022-07-21 17:21:16,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 17:21:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 188 transitions. [2022-07-21 17:21:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 17:21:16,646 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:16,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:16,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:16,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:17,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:21:17,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1602092369, now seen corresponding path program 1 times [2022-07-21 17:21:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346746773] [2022-07-21 17:21:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:17,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:17,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:17,058 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) [2022-07-21 17:21:17,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:21:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:17,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:21:17,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:21:17,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:21:17,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:17,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346746773] [2022-07-21 17:21:17,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346746773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:21:17,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:21:17,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:21:17,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705729619] [2022-07-21 17:21:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:21:17,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:21:17,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:21:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:21:17,173 INFO L87 Difference]: Start difference. First operand 137 states and 188 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:21:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:17,251 INFO L93 Difference]: Finished difference Result 122 states and 163 transitions. [2022-07-21 17:21:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:21:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-07-21 17:21:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:17,255 INFO L225 Difference]: With dead ends: 122 [2022-07-21 17:21:17,255 INFO L226 Difference]: Without dead ends: 120 [2022-07-21 17:21:17,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:21:17,256 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:17,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 347 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:21:17,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-21 17:21:17,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-21 17:21:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 112 states have internal predecessors, (147), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:21:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 161 transitions. [2022-07-21 17:21:17,266 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 161 transitions. Word has length 15 [2022-07-21 17:21:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:17,266 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 161 transitions. [2022-07-21 17:21:17,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 17:21:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 161 transitions. [2022-07-21 17:21:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 17:21:17,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:17,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:17,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-21 17:21:17,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:17,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash 684574475, now seen corresponding path program 1 times [2022-07-21 17:21:17,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:17,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853084024] [2022-07-21 17:21:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:17,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:17,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:17,478 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) [2022-07-21 17:21:17,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:21:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:21:17,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:17,564 INFO L390 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 11 treesize of output 7 [2022-07-21 17:21:17,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-21 17:21:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:21:17,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:21:17,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:17,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853084024] [2022-07-21 17:21:17,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853084024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:21:17,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:21:17,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:21:17,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263098918] [2022-07-21 17:21:17,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:21:17,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:21:17,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:21:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:21:17,595 INFO L87 Difference]: Start difference. First operand 120 states and 161 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:21:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:17,785 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2022-07-21 17:21:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:21:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-07-21 17:21:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:17,786 INFO L225 Difference]: With dead ends: 130 [2022-07-21 17:21:17,787 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 17:21:17,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:21:17,788 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 5 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:17,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 401 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:21:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 17:21:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-07-21 17:21:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 80 states have (on average 1.8875) internal successors, (151), 115 states have internal predecessors, (151), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:21:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2022-07-21 17:21:17,795 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 20 [2022-07-21 17:21:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:17,795 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2022-07-21 17:21:17,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:21:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2022-07-21 17:21:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-21 17:21:17,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:17,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:17,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-21 17:21:18,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:18,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1122879988, now seen corresponding path program 1 times [2022-07-21 17:21:18,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:18,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14473624] [2022-07-21 17:21:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:18,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:18,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:18,009 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) [2022-07-21 17:21:18,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:21:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:18,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:21:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:21:18,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:21:18,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14473624] [2022-07-21 17:21:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14473624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:18,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:21:18,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-21 17:21:18,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521770128] [2022-07-21 17:21:18,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:18,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:21:18,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:21:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:21:18,393 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:21:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:18,654 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2022-07-21 17:21:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 17:21:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2022-07-21 17:21:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:18,656 INFO L225 Difference]: With dead ends: 127 [2022-07-21 17:21:18,656 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 17:21:18,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:21:18,657 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 152 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:18,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 294 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 179 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-07-21 17:21:18,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 17:21:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-21 17:21:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.8433734939759037) internal successors, (153), 117 states have internal predecessors, (153), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:21:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2022-07-21 17:21:18,663 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 20 [2022-07-21 17:21:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:18,663 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2022-07-21 17:21:18,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:21:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2022-07-21 17:21:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:21:18,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:18,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:18,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:18,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:18,873 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1782681151, now seen corresponding path program 1 times [2022-07-21 17:21:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:18,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271338852] [2022-07-21 17:21:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:18,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:18,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:18,875 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) [2022-07-21 17:21:18,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:21:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:21:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:21:19,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:23,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:23,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271338852] [2022-07-21 17:21:23,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271338852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:23,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [342154185] [2022-07-21 17:21:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:23,353 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:21:23,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:21:23,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:21:23,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-07-21 17:21:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:23,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:21:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:21:23,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:27,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [342154185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:27,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:21:27,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-21 17:21:27,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939469849] [2022-07-21 17:21:27,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:27,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:21:27,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:21:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-21 17:21:27,886 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:21:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:28,086 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2022-07-21 17:21:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:21:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2022-07-21 17:21:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:28,087 INFO L225 Difference]: With dead ends: 136 [2022-07-21 17:21:28,087 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 17:21:28,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-21 17:21:28,088 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 9 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:28,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 421 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 249 Unchecked, 0.2s Time] [2022-07-21 17:21:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 17:21:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-07-21 17:21:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 114 states have internal predecessors, (148), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 17:21:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2022-07-21 17:21:28,094 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 23 [2022-07-21 17:21:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:28,094 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2022-07-21 17:21:28,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 17:21:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2022-07-21 17:21:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:21:28,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:28,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:28,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:28,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-21 17:21:28,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:28,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash -931351798, now seen corresponding path program 1 times [2022-07-21 17:21:28,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:28,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226960813] [2022-07-21 17:21:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:28,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:28,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:28,498 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) [2022-07-21 17:21:28,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:21:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:21:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:28,573 INFO L390 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 [2022-07-21 17:21:28,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:21:28,621 INFO L390 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 17 treesize of output 9 [2022-07-21 17:21:28,711 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:21:28,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 17:21:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:21:28,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:21:28,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:28,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226960813] [2022-07-21 17:21:28,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226960813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:28,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:21:28,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-21 17:21:28,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721478058] [2022-07-21 17:21:28,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:28,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:21:28,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:21:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:21:28,864 INFO L87 Difference]: Start difference. First operand 124 states and 162 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:21:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:29,231 INFO L93 Difference]: Finished difference Result 140 states and 179 transitions. [2022-07-21 17:21:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:21:29,232 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-21 17:21:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:29,233 INFO L225 Difference]: With dead ends: 140 [2022-07-21 17:21:29,233 INFO L226 Difference]: Without dead ends: 140 [2022-07-21 17:21:29,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:21:29,234 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 8 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:29,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 314 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 211 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-07-21 17:21:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-21 17:21:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-07-21 17:21:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 90 states have (on average 1.8) internal successors, (162), 124 states have internal predecessors, (162), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-21 17:21:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2022-07-21 17:21:29,239 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 25 [2022-07-21 17:21:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:29,240 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2022-07-21 17:21:29,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:21:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2022-07-21 17:21:29,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:21:29,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:29,241 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:29,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:29,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:29,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash -931351797, now seen corresponding path program 1 times [2022-07-21 17:21:29,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:29,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340077962] [2022-07-21 17:21:29,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:29,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:29,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:29,456 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) [2022-07-21 17:21:29,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:21:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:29,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 17:21:29,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:29,545 INFO L390 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 [2022-07-21 17:21:29,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:21:29,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:21:29,653 INFO L390 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 17 treesize of output 9 [2022-07-21 17:21:29,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:21:33,830 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:21:33,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:21:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:21:33,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:34,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340077962] [2022-07-21 17:21:34,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340077962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1300544554] [2022-07-21 17:21:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:34,154 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:21:34,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:21:34,181 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:21:34,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-21 17:21:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:34,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:21:34,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:34,319 INFO L390 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 [2022-07-21 17:21:34,330 INFO L390 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 [2022-07-21 17:21:34,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:21:34,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:21:34,533 INFO L390 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 14 [2022-07-21 17:21:34,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:21:38,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:21:38,790 INFO L390 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 12 treesize of output 14 [2022-07-21 17:21:38,814 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:21:38,814 INFO L390 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 12 treesize of output 12 [2022-07-21 17:21:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 17:21:38,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:51,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1300544554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:51,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:21:51,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-21 17:21:51,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615521585] [2022-07-21 17:21:51,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 17:21:51,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 17:21:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=285, Unknown=9, NotChecked=0, Total=342 [2022-07-21 17:21:51,285 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 17:21:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:54,158 INFO L93 Difference]: Finished difference Result 140 states and 179 transitions. [2022-07-21 17:21:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:21:54,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2022-07-21 17:21:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:54,159 INFO L225 Difference]: With dead ends: 140 [2022-07-21 17:21:54,160 INFO L226 Difference]: Without dead ends: 140 [2022-07-21 17:21:54,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=76, Invalid=420, Unknown=10, NotChecked=0, Total=506 [2022-07-21 17:21:54,161 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 9 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:54,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 636 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 424 Invalid, 0 Unknown, 84 Unchecked, 0.7s Time] [2022-07-21 17:21:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-21 17:21:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-07-21 17:21:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 90 states have (on average 1.7777777777777777) internal successors, (160), 124 states have internal predecessors, (160), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-21 17:21:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 177 transitions. [2022-07-21 17:21:54,166 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 177 transitions. Word has length 25 [2022-07-21 17:21:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:54,166 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 177 transitions. [2022-07-21 17:21:54,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-21 17:21:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 177 transitions. [2022-07-21 17:21:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:21:54,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:54,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:54,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:54,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:54,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:54,570 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1436910423, now seen corresponding path program 1 times [2022-07-21 17:21:54,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:54,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503936946] [2022-07-21 17:21:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:54,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:54,572 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) [2022-07-21 17:21:54,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 17:21:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:54,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:21:54,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:54,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:21:54,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:21:54,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:21:54,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:21:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:21:54,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:21:54,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:54,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503936946] [2022-07-21 17:21:54,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503936946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:21:54,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:21:54,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 17:21:54,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245770612] [2022-07-21 17:21:54,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:21:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:21:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:21:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:21:54,766 INFO L87 Difference]: Start difference. First operand 138 states and 177 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:21:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:54,919 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2022-07-21 17:21:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:21:54,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-21 17:21:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:54,920 INFO L225 Difference]: With dead ends: 132 [2022-07-21 17:21:54,920 INFO L226 Difference]: Without dead ends: 126 [2022-07-21 17:21:54,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:21:54,921 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 2 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:54,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 403 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:21:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-21 17:21:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-07-21 17:21:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 82 states have (on average 1.7926829268292683) internal successors, (147), 115 states have internal predecessors, (147), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:21:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2022-07-21 17:21:54,925 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 25 [2022-07-21 17:21:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:54,926 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2022-07-21 17:21:54,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:21:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2022-07-21 17:21:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 17:21:54,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:54,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:54,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:55,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:55,136 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1675880117, now seen corresponding path program 1 times [2022-07-21 17:21:55,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:55,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307367518] [2022-07-21 17:21:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:55,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:55,138 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) [2022-07-21 17:21:55,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 17:21:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:55,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:21:55,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:55,226 INFO L390 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 [2022-07-21 17:21:55,323 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:21:55,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-21 17:21:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:21:55,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:21:55,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:55,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307367518] [2022-07-21 17:21:55,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307367518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:21:55,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:21:55,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:21:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900409573] [2022-07-21 17:21:55,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:21:55,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:21:55,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:21:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:21:55,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:21:55,345 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:21:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:55,588 INFO L93 Difference]: Finished difference Result 146 states and 179 transitions. [2022-07-21 17:21:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:21:55,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-07-21 17:21:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:55,589 INFO L225 Difference]: With dead ends: 146 [2022-07-21 17:21:55,589 INFO L226 Difference]: Without dead ends: 146 [2022-07-21 17:21:55,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:21:55,590 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 49 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:55,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 141 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-07-21 17:21:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-21 17:21:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2022-07-21 17:21:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 82 states have (on average 1.7804878048780488) internal successors, (146), 114 states have internal predecessors, (146), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:21:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2022-07-21 17:21:55,594 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 27 [2022-07-21 17:21:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:55,594 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2022-07-21 17:21:55,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 17:21:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2022-07-21 17:21:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 17:21:55,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:55,595 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:21:55,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:55,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:21:55,799 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:21:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:55,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1675880116, now seen corresponding path program 1 times [2022-07-21 17:21:55,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:21:55,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521573471] [2022-07-21 17:21:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:55,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:21:55,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:21:55,802 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) [2022-07-21 17:21:55,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 17:21:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:55,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:21:55,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:55,884 INFO L390 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 [2022-07-21 17:21:55,896 INFO L390 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 [2022-07-21 17:21:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:21:56,103 INFO L390 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 12 treesize of output 14 [2022-07-21 17:21:56,116 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:21:56,116 INFO L390 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 12 treesize of output 12 [2022-07-21 17:21:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:21:56,271 INFO L390 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 12 treesize of output 14 [2022-07-21 17:21:56,289 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:21:56,289 INFO L390 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 12 treesize of output 12 [2022-07-21 17:21:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:21:56,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:58,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:21:58,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521573471] [2022-07-21 17:21:58,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521573471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:58,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263474319] [2022-07-21 17:21:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:58,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:21:58,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:21:58,703 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:21:58,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-21 17:21:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 17:21:58,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:58,827 INFO L390 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 [2022-07-21 17:21:58,837 INFO L390 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 [2022-07-21 17:21:58,933 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:21:58,934 INFO L390 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 12 treesize of output 12 [2022-07-21 17:21:58,944 INFO L390 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 12 treesize of output 14 [2022-07-21 17:21:58,987 INFO L390 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 11 treesize of output 7 [2022-07-21 17:21:59,058 INFO L390 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 8 treesize of output 4 [2022-07-21 17:22:01,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:22:01,155 INFO L390 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 12 treesize of output 14 [2022-07-21 17:22:01,168 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:01,168 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:22:01,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:03,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263474319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:03,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:22:03,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 11 [2022-07-21 17:22:03,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004685036] [2022-07-21 17:22:03,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:22:03,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:22:03,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:22:03,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2022-07-21 17:22:03,596 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:22:04,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:04,348 INFO L93 Difference]: Finished difference Result 171 states and 203 transitions. [2022-07-21 17:22:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:22:04,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-07-21 17:22:04,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:04,349 INFO L225 Difference]: With dead ends: 171 [2022-07-21 17:22:04,349 INFO L226 Difference]: Without dead ends: 171 [2022-07-21 17:22:04,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=60, Invalid=245, Unknown=1, NotChecked=0, Total=306 [2022-07-21 17:22:04,350 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:04,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 276 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 471 Invalid, 0 Unknown, 75 Unchecked, 0.6s Time] [2022-07-21 17:22:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-21 17:22:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2022-07-21 17:22:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.7534246575342465) internal successors, (128), 103 states have internal predecessors, (128), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:22:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2022-07-21 17:22:04,355 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 27 [2022-07-21 17:22:04,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:04,355 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2022-07-21 17:22:04,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 17:22:04,355 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2022-07-21 17:22:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:22:04,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:04,356 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:04,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:04,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:04,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:22:04,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:04,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:04,764 INFO L85 PathProgramCache]: Analyzing trace with hash -412676065, now seen corresponding path program 1 times [2022-07-21 17:22:04,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:04,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239521629] [2022-07-21 17:22:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:04,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:04,765 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) [2022-07-21 17:22:04,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 17:22:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:04,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:22:04,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:04,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:04,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:04,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:22:05,021 INFO L390 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 [2022-07-21 17:22:05,130 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-21 17:22:05,130 INFO L390 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 29 treesize of output 27 [2022-07-21 17:22:05,233 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:22:05,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2022-07-21 17:22:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:22:05,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:05,424 INFO L356 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-07-21 17:22:05,424 INFO L390 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 65 treesize of output 64 [2022-07-21 17:22:05,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:05,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239521629] [2022-07-21 17:22:05,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239521629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:05,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2062296628] [2022-07-21 17:22:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:22:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:22:05,489 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:22:05,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-21 17:22:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:05,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:22:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:05,612 INFO L390 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 [2022-07-21 17:22:05,756 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:05,756 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:05,798 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:07,896 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_9| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_18| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_18|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_9|)))) is different from true [2022-07-21 17:22:08,015 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:22:08,015 INFO L390 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 28 treesize of output 29 [2022-07-21 17:22:08,096 INFO L390 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 13 [2022-07-21 17:22:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-21 17:22:08,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:08,125 INFO L356 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-07-21 17:22:08,125 INFO L390 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 19 treesize of output 18 [2022-07-21 17:22:08,133 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_270 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_270) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|)) is different from false [2022-07-21 17:22:08,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2062296628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:08,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:22:08,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-07-21 17:22:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635933562] [2022-07-21 17:22:08,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:22:08,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:22:08,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:22:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=492, Unknown=2, NotChecked=90, Total=650 [2022-07-21 17:22:08,143 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:22:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:17,642 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2022-07-21 17:22:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:22:17,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-07-21 17:22:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:17,644 INFO L225 Difference]: With dead ends: 118 [2022-07-21 17:22:17,644 INFO L226 Difference]: Without dead ends: 118 [2022-07-21 17:22:17,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=211, Invalid=1353, Unknown=4, NotChecked=154, Total=1722 [2022-07-21 17:22:17,645 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 41 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:17,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 789 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 492 Invalid, 0 Unknown, 138 Unchecked, 0.7s Time] [2022-07-21 17:22:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-21 17:22:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2022-07-21 17:22:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 73 states have (on average 1.7397260273972603) internal successors, (127), 102 states have internal predecessors, (127), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:22:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2022-07-21 17:22:17,649 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 28 [2022-07-21 17:22:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:17,649 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2022-07-21 17:22:17,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:22:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2022-07-21 17:22:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 17:22:17,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:17,650 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:17,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:17,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-21 17:22:18,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:18,053 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:18,054 INFO L85 PathProgramCache]: Analyzing trace with hash -412676064, now seen corresponding path program 1 times [2022-07-21 17:22:18,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:18,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693938811] [2022-07-21 17:22:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:18,054 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:18,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:18,055 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) [2022-07-21 17:22:18,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 17:22:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:22:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:18,149 INFO L390 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 [2022-07-21 17:22:18,235 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:18,235 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:18,264 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:18,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:18,513 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:22:18,513 INFO L390 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 44 treesize of output 43 [2022-07-21 17:22:18,519 INFO L390 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 33 treesize of output 33 [2022-07-21 17:22:18,604 INFO L390 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 31 treesize of output 19 [2022-07-21 17:22:18,611 INFO L390 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 26 treesize of output 14 [2022-07-21 17:22:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:22:18,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:18,883 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:22:18,883 INFO L390 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 50 treesize of output 54 [2022-07-21 17:22:19,039 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_295 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_295) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse1 (bvadd .cse1 (_ bv4 32))))))) (and (or (and .cse0 (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32)))) (forall ((v_ArrVal_294 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_294) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|))) .cse0 (forall ((v_prenex_1 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_1) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))))) is different from false [2022-07-21 17:22:19,089 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:19,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693938811] [2022-07-21 17:22:19,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693938811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:19,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183705487] [2022-07-21 17:22:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:19,089 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:22:19,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:22:19,092 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:22:19,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-07-21 17:22:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:22:19,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:19,230 INFO L390 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 [2022-07-21 17:22:19,269 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:19,270 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:19,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:19,291 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:19,518 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:22:19,518 INFO L390 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 44 treesize of output 43 [2022-07-21 17:22:19,524 INFO L390 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 33 treesize of output 33 [2022-07-21 17:22:19,556 INFO L390 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 31 treesize of output 19 [2022-07-21 17:22:19,562 INFO L390 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 26 treesize of output 14 [2022-07-21 17:22:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:22:19,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:19,686 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:22:19,686 INFO L390 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 50 treesize of output 54 [2022-07-21 17:22:19,841 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_4 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_4) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_320 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_320) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset|))) (or (forall ((v_ArrVal_319 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_319) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|)) (forall ((v_ArrVal_320 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_320) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))) is different from false [2022-07-21 17:22:19,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1183705487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:19,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:22:19,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-21 17:22:19,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189288257] [2022-07-21 17:22:19,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:22:19,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:22:19,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:22:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=178, Unknown=2, NotChecked=54, Total=272 [2022-07-21 17:22:19,882 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:22:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:21,080 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-07-21 17:22:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 17:22:21,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-07-21 17:22:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:21,081 INFO L225 Difference]: With dead ends: 137 [2022-07-21 17:22:21,081 INFO L226 Difference]: Without dead ends: 137 [2022-07-21 17:22:21,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=461, Unknown=2, NotChecked=90, Total=650 [2022-07-21 17:22:21,082 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:21,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 341 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 429 Invalid, 0 Unknown, 36 Unchecked, 0.8s Time] [2022-07-21 17:22:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-21 17:22:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2022-07-21 17:22:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 73 states have (on average 1.726027397260274) internal successors, (126), 101 states have internal predecessors, (126), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:22:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2022-07-21 17:22:21,086 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 28 [2022-07-21 17:22:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:21,087 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2022-07-21 17:22:21,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:22:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2022-07-21 17:22:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:22:21,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:21,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:21,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:21,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:21,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:21,491 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1444706688, now seen corresponding path program 1 times [2022-07-21 17:22:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:21,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539095490] [2022-07-21 17:22:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:21,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:21,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:21,493 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:21,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 17:22:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:21,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:22:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:22:21,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:22:21,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539095490] [2022-07-21 17:22:21,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539095490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:22:21,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:22:21,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:22:21,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581643059] [2022-07-21 17:22:21,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:22:21,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:22:21,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:22:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:22:21,612 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:22:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:21,818 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2022-07-21 17:22:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:22:21,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-07-21 17:22:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:21,820 INFO L225 Difference]: With dead ends: 110 [2022-07-21 17:22:21,820 INFO L226 Difference]: Without dead ends: 110 [2022-07-21 17:22:21,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:22:21,821 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 30 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:21,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 127 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:22:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-21 17:22:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-07-21 17:22:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 73 states have (on average 1.7123287671232876) internal successors, (125), 100 states have internal predecessors, (125), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:22:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2022-07-21 17:22:21,823 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 30 [2022-07-21 17:22:21,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:21,824 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2022-07-21 17:22:21,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:22:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2022-07-21 17:22:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 17:22:21,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:21,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:21,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:22,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:22,032 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:22,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:22,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1444706687, now seen corresponding path program 1 times [2022-07-21 17:22:22,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:22,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326600824] [2022-07-21 17:22:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:22,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:22,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:22,034 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:22,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 17:22:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:22:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:22:22,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:22,374 INFO L390 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 8 treesize of output 6 [2022-07-21 17:22:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:22:22,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326600824] [2022-07-21 17:22:22,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326600824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:22:22,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:22:22,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-21 17:22:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093136720] [2022-07-21 17:22:22,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:22:22,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:22:22,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:22:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:22:22,567 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 17:22:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:23,226 INFO L93 Difference]: Finished difference Result 107 states and 131 transitions. [2022-07-21 17:22:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:22:23,227 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-07-21 17:22:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:23,227 INFO L225 Difference]: With dead ends: 107 [2022-07-21 17:22:23,227 INFO L226 Difference]: Without dead ends: 107 [2022-07-21 17:22:23,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:22:23,228 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 92 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:23,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 336 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:22:23,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-21 17:22:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2022-07-21 17:22:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.625) internal successors, (104), 88 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:22:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2022-07-21 17:22:23,232 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 30 [2022-07-21 17:22:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:23,232 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2022-07-21 17:22:23,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 17:22:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2022-07-21 17:22:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:22:23,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:23,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:23,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-21 17:22:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:23,440 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234894, now seen corresponding path program 1 times [2022-07-21 17:22:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:23,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718506839] [2022-07-21 17:22:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:23,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:23,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:23,442 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:23,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 17:22:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:23,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:22:23,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:23,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:23,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:23,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-21 17:22:23,766 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-21 17:22:23,766 INFO L390 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 23 treesize of output 21 [2022-07-21 17:22:23,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:22:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:22:23,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:22:23,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:23,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718506839] [2022-07-21 17:22:23,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718506839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:22:23,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:22:23,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 17:22:23,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412618628] [2022-07-21 17:22:23,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:22:23,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 17:22:23,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:23,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 17:22:23,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:22:23,825 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:22:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:24,079 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2022-07-21 17:22:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 17:22:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-07-21 17:22:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:24,081 INFO L225 Difference]: With dead ends: 176 [2022-07-21 17:22:24,081 INFO L226 Difference]: Without dead ends: 176 [2022-07-21 17:22:24,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:22:24,082 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 127 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:24,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 443 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-07-21 17:22:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-21 17:22:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 107. [2022-07-21 17:22:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.5694444444444444) internal successors, (113), 96 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:22:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2022-07-21 17:22:24,086 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 31 [2022-07-21 17:22:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:24,086 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2022-07-21 17:22:24,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:22:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2022-07-21 17:22:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:22:24,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:24,087 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:24,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:24,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:24,297 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:24,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234347, now seen corresponding path program 1 times [2022-07-21 17:22:24,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:24,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258452918] [2022-07-21 17:22:24,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:24,298 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:24,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:24,299 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:24,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 17:22:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:22:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:24,408 INFO L390 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 17 treesize of output 9 [2022-07-21 17:22:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:22:24,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:22:24,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:24,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258452918] [2022-07-21 17:22:24,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258452918] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:22:24,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:22:24,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:22:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587242432] [2022-07-21 17:22:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:22:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:22:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:22:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:22:24,421 INFO L87 Difference]: Start difference. First operand 107 states and 123 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:22:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:24,760 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2022-07-21 17:22:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:22:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-07-21 17:22:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:24,761 INFO L225 Difference]: With dead ends: 112 [2022-07-21 17:22:24,761 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 17:22:24,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:22:24,762 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 16 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:24,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 221 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:22:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 17:22:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2022-07-21 17:22:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.5555555555555556) internal successors, (112), 95 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:22:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-07-21 17:22:24,766 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 31 [2022-07-21 17:22:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:24,766 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-07-21 17:22:24,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:22:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-07-21 17:22:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:22:24,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:24,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:24,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:24,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:24,975 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234346, now seen corresponding path program 1 times [2022-07-21 17:22:24,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:24,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498167483] [2022-07-21 17:22:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:24,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:24,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:24,978 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:24,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 17:22:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:25,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:22:25,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:25,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-21 17:22:25,202 INFO L390 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 32 treesize of output 16 [2022-07-21 17:22:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:22:25,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:22:25,252 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:25,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498167483] [2022-07-21 17:22:25,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498167483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:22:25,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:22:25,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:22:25,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75269432] [2022-07-21 17:22:25,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:22:25,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:22:25,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:25,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:22:25,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:22:25,253 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:22:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:25,918 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2022-07-21 17:22:25,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:22:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-07-21 17:22:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:25,919 INFO L225 Difference]: With dead ends: 118 [2022-07-21 17:22:25,919 INFO L226 Difference]: Without dead ends: 118 [2022-07-21 17:22:25,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:22:25,920 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:25,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 242 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:22:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-21 17:22:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2022-07-21 17:22:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.5416666666666667) internal successors, (111), 94 states have internal predecessors, (111), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:22:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2022-07-21 17:22:25,923 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 31 [2022-07-21 17:22:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:25,924 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2022-07-21 17:22:25,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:22:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2022-07-21 17:22:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 17:22:25,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:25,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:25,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:26,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:26,127 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2032748399, now seen corresponding path program 1 times [2022-07-21 17:22:26,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:26,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845387891] [2022-07-21 17:22:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:26,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:26,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:26,129 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:26,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 17:22:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:26,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:22:26,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:26,215 INFO L390 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 [2022-07-21 17:22:26,284 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:26,284 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:26,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:26,318 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:26,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-21 17:22:26,467 INFO L390 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 14 treesize of output 16 [2022-07-21 17:22:26,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:22:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:22:26,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:26,544 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_438 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_438) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv0 32))) is different from false [2022-07-21 17:22:26,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:26,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845387891] [2022-07-21 17:22:26,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845387891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:26,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [349087427] [2022-07-21 17:22:26,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:26,552 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:22:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:22:26,553 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:22:26,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-21 17:22:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:26,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:22:26,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:26,687 INFO L390 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 [2022-07-21 17:22:26,736 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:26,736 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:26,758 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:26,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:26,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-21 17:22:26,909 INFO L390 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 14 treesize of output 16 [2022-07-21 17:22:26,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 17:22:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:22:26,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:26,948 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_460 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_460) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) (_ bv0 32))) is different from false [2022-07-21 17:22:26,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [349087427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:26,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:22:26,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-21 17:22:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54666936] [2022-07-21 17:22:26,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:22:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:22:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:22:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=130, Unknown=2, NotChecked=46, Total=210 [2022-07-21 17:22:26,958 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:22:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:27,829 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2022-07-21 17:22:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 17:22:27,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-07-21 17:22:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:27,830 INFO L225 Difference]: With dead ends: 148 [2022-07-21 17:22:27,830 INFO L226 Difference]: Without dead ends: 148 [2022-07-21 17:22:27,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=412, Unknown=2, NotChecked=86, Total=600 [2022-07-21 17:22:27,831 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 144 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:27,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 351 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 450 Invalid, 0 Unknown, 34 Unchecked, 0.6s Time] [2022-07-21 17:22:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-21 17:22:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2022-07-21 17:22:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 87 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:22:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2022-07-21 17:22:27,834 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 31 [2022-07-21 17:22:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:27,835 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2022-07-21 17:22:27,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 17:22:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2022-07-21 17:22:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 17:22:27,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:27,836 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:22:27,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:28,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:28,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:28,239 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1088706739, now seen corresponding path program 1 times [2022-07-21 17:22:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:28,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306973109] [2022-07-21 17:22:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:28,241 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:28,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 17:22:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:28,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:22:28,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:28,338 INFO L390 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 [2022-07-21 17:22:28,407 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:28,407 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:28,428 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:30,511 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_29| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_20| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_29|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_20|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_29|))) is different from true [2022-07-21 17:22:32,678 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-21 17:22:32,679 INFO L390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-07-21 17:22:32,684 INFO L390 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 27 treesize of output 29 [2022-07-21 17:22:32,736 INFO L390 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 24 treesize of output 16 [2022-07-21 17:22:32,793 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:22:32,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-07-21 17:22:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 17:22:32,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:32,917 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_483 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |c_ULTIMATE.start_entry_point_#t~ret48#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_483) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)) (_ bv0 32)))) is different from false [2022-07-21 17:22:36,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306973109] [2022-07-21 17:22:36,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306973109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1330467755] [2022-07-21 17:22:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:36,043 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:22:36,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:22:36,045 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:22:36,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-21 17:22:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:36,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:22:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:36,192 INFO L390 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 [2022-07-21 17:22:36,298 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:36,299 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:36,365 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:36,764 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:22:36,765 INFO L390 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 26 treesize of output 27 [2022-07-21 17:22:36,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-21 17:22:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:22:36,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:37,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1330467755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:37,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:22:37,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-07-21 17:22:37,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515008027] [2022-07-21 17:22:37,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:22:37,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:22:37,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:37,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:22:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=556, Unknown=31, NotChecked=98, Total=756 [2022-07-21 17:22:37,186 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:22:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:38,825 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2022-07-21 17:22:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:22:38,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 32 [2022-07-21 17:22:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:38,828 INFO L225 Difference]: With dead ends: 114 [2022-07-21 17:22:38,828 INFO L226 Difference]: Without dead ends: 114 [2022-07-21 17:22:38,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=185, Invalid=1262, Unknown=43, NotChecked=150, Total=1640 [2022-07-21 17:22:38,829 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 75 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:38,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 597 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 479 Invalid, 0 Unknown, 202 Unchecked, 0.8s Time] [2022-07-21 17:22:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-21 17:22:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2022-07-21 17:22:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.5277777777777777) internal successors, (110), 94 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:22:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-07-21 17:22:38,833 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 32 [2022-07-21 17:22:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:38,833 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-07-21 17:22:38,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-21 17:22:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-07-21 17:22:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 17:22:38,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:38,833 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-21 17:22:38,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:39,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-07-21 17:22:39,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:22:39,234 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:39,235 INFO L85 PathProgramCache]: Analyzing trace with hash 738912307, now seen corresponding path program 1 times [2022-07-21 17:22:39,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:39,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131282575] [2022-07-21 17:22:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:39,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:39,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:39,237 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:39,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 17:22:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:22:39,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:39,352 INFO L390 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 17 treesize of output 9 [2022-07-21 17:22:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 17:22:39,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:22:39,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:39,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131282575] [2022-07-21 17:22:39,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131282575] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:22:39,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:22:39,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:22:39,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725207933] [2022-07-21 17:22:39,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:22:39,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:22:39,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:22:39,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:22:39,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:22:39,372 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:22:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:39,625 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-07-21 17:22:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:22:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-07-21 17:22:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:39,626 INFO L225 Difference]: With dead ends: 106 [2022-07-21 17:22:39,626 INFO L226 Difference]: Without dead ends: 106 [2022-07-21 17:22:39,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:22:39,627 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 6 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:39,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 182 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:22:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-21 17:22:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-07-21 17:22:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:22:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2022-07-21 17:22:39,630 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 33 [2022-07-21 17:22:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:39,631 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2022-07-21 17:22:39,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 17:22:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2022-07-21 17:22:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:22:39,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:39,632 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 17:22:39,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-21 17:22:39,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:22:39,843 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:22:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1143014625, now seen corresponding path program 1 times [2022-07-21 17:22:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:22:39,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850081851] [2022-07-21 17:22:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:39,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:22:39,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:22:39,845 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:22:39,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-21 17:22:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:39,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 17:22:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:39,979 INFO L390 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 [2022-07-21 17:22:40,050 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:40,051 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:40,075 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:42,151 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_22| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_22|) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_33|))) is different from true [2022-07-21 17:22:42,164 INFO L390 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 [2022-07-21 17:22:46,308 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-21 17:22:46,308 INFO L390 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 42 treesize of output 32 [2022-07-21 17:22:46,313 INFO L390 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 31 treesize of output 33 [2022-07-21 17:22:46,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-07-21 17:22:46,494 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:22:46,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-07-21 17:22:46,634 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 17:22:46,635 INFO L390 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 15 treesize of output 20 [2022-07-21 17:22:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-21 17:22:46,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:47,412 INFO L390 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 110 treesize of output 77 [2022-07-21 17:22:47,427 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret48#1.base_47| (_ BitVec 32)) (v_ArrVal_549 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_47| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_47|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_549) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-07-21 17:22:47,429 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:22:47,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850081851] [2022-07-21 17:22:47,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850081851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:47,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235824971] [2022-07-21 17:22:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:47,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:22:47,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:22:47,431 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:22:47,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-07-21 17:22:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:22:47,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:47,632 INFO L390 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 [2022-07-21 17:22:49,821 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:22:49,821 INFO L390 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 12 treesize of output 12 [2022-07-21 17:22:49,886 INFO L390 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 11 treesize of output 7 [2022-07-21 17:22:49,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:22:52,073 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_35|))) is different from true [2022-07-21 17:22:52,079 INFO L390 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 [2022-07-21 17:23:00,308 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-21 17:23:00,309 INFO L390 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 42 treesize of output 32 [2022-07-21 17:23:00,314 INFO L390 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 31 treesize of output 33 [2022-07-21 17:23:00,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-07-21 17:23:00,619 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 17:23:00,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-07-21 17:23:02,789 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 17:23:02,789 INFO L390 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 21 treesize of output 28 [2022-07-21 17:23:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-21 17:23:02,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:23:03,296 INFO L390 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 110 treesize of output 77 [2022-07-21 17:23:03,309 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_entry_point_#t~ret48#1.base_50| (_ BitVec 32))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_50| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_50|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_549) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-07-21 17:23:03,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235824971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:23:03,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:23:03,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2022-07-21 17:23:03,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590913375] [2022-07-21 17:23:03,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:23:03,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 17:23:03,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:23:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 17:23:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1012, Unknown=17, NotChecked=268, Total=1406 [2022-07-21 17:23:03,314 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:23:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:23:22,828 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2022-07-21 17:23:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:23:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 37 [2022-07-21 17:23:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:23:22,829 INFO L225 Difference]: With dead ends: 119 [2022-07-21 17:23:22,829 INFO L226 Difference]: Without dead ends: 119 [2022-07-21 17:23:22,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=210, Invalid=1677, Unknown=21, NotChecked=348, Total=2256 [2022-07-21 17:23:22,830 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 60 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:23:22,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 739 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 696 Invalid, 0 Unknown, 424 Unchecked, 0.9s Time] [2022-07-21 17:23:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-21 17:23:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2022-07-21 17:23:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 98 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:23:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-07-21 17:23:22,834 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 37 [2022-07-21 17:23:22,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:23:22,834 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-07-21 17:23:22,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 17:23:22,834 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-07-21 17:23:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:23:22,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:23:22,835 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-21 17:23:22,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-07-21 17:23:23,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-21 17:23:23,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:23:23,249 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:23:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:23:23,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1143014624, now seen corresponding path program 1 times [2022-07-21 17:23:23,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:23:23,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390937672] [2022-07-21 17:23:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:23:23,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:23:23,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:23:23,251 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:23:23,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-21 17:23:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:23:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 17:23:23,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:23:23,380 INFO L390 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 [2022-07-21 17:23:23,432 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:23:23,432 INFO L390 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 12 treesize of output 12 [2022-07-21 17:23:23,454 INFO L390 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 6 treesize of output 5 [2022-07-21 17:23:23,460 INFO L390 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 11 treesize of output 7 [2022-07-21 17:23:25,514 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_25| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_37| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_37| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_37|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_25|)))) is different from true [2022-07-21 17:23:27,570 INFO L390 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 [2022-07-21 17:23:27,577 INFO L390 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 [2022-07-21 17:23:29,780 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-21 17:23:29,780 INFO L390 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 55 treesize of output 41 [2022-07-21 17:23:29,785 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2022-07-21 17:23:30,078 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 17:23:30,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2022-07-21 17:23:30,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-07-21 17:23:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:23:30,363 INFO L390 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 12 treesize of output 14 [2022-07-21 17:23:30,379 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:23:30,379 INFO L390 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 15 treesize of output 15 [2022-07-21 17:23:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 17:23:30,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:23:34,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:23:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390937672] [2022-07-21 17:23:34,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390937672] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:23:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2013090198] [2022-07-21 17:23:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:23:34,954 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:23:34,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:23:34,955 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:23:34,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-21 17:23:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:23:35,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-21 17:23:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:23:35,137 INFO L390 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 [2022-07-21 17:23:35,393 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:23:35,393 INFO L390 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 12 treesize of output 12 [2022-07-21 17:23:35,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:23:35,473 INFO L390 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 11 treesize of output 7 [2022-07-21 17:23:37,875 INFO L390 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 [2022-07-21 17:23:37,889 INFO L390 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 [2022-07-21 17:23:38,242 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-21 17:23:38,242 INFO L390 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 55 treesize of output 41 [2022-07-21 17:23:38,249 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 54 [2022-07-21 17:23:38,786 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-21 17:23:38,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 46 [2022-07-21 17:23:38,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-07-21 17:23:40,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:23:40,983 INFO L390 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 12 treesize of output 14 [2022-07-21 17:23:40,998 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:23:40,998 INFO L390 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 15 treesize of output 15 [2022-07-21 17:23:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:23:41,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:23:43,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2013090198] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:23:43,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:23:43,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2022-07-21 17:23:43,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560001250] [2022-07-21 17:23:43,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:23:43,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 17:23:43,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:23:43,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 17:23:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=4, NotChecked=68, Total=1332 [2022-07-21 17:23:43,932 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 35 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 26 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-21 17:23:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:23:49,430 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-07-21 17:23:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 17:23:49,431 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 26 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 37 [2022-07-21 17:23:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:23:49,431 INFO L225 Difference]: With dead ends: 113 [2022-07-21 17:23:49,431 INFO L226 Difference]: Without dead ends: 113 [2022-07-21 17:23:49,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=221, Invalid=1940, Unknown=5, NotChecked=90, Total=2256 [2022-07-21 17:23:49,432 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 54 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:23:49,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 745 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 489 Invalid, 0 Unknown, 373 Unchecked, 0.8s Time] [2022-07-21 17:23:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-21 17:23:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-07-21 17:23:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.4935064935064934) internal successors, (115), 98 states have internal predecessors, (115), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:23:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2022-07-21 17:23:49,436 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 37 [2022-07-21 17:23:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:23:49,436 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2022-07-21 17:23:49,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 26 states have internal predecessors, (50), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-21 17:23:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2022-07-21 17:23:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 17:23:49,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:23:49,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:23:49,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-07-21 17:23:49,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-21 17:23:49,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:23:49,841 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:23:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:23:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1229276979, now seen corresponding path program 1 times [2022-07-21 17:23:49,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:23:49,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557112846] [2022-07-21 17:23:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:23:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:23:49,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:23:49,844 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:23:49,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 17:23:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:23:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:23:49,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:23:49,997 INFO L390 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 12 treesize of output 14 [2022-07-21 17:23:50,085 INFO L390 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 12 treesize of output 14 [2022-07-21 17:23:50,372 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-07-21 17:23:50,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2022-07-21 17:23:50,377 INFO L390 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 21 treesize of output 13 [2022-07-21 17:23:50,520 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-07-21 17:23:50,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 38 [2022-07-21 17:23:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:23:50,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:23:50,862 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:23:50,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-07-21 17:23:50,870 INFO L390 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 24 treesize of output 16 [2022-07-21 17:23:51,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:23:51,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557112846] [2022-07-21 17:23:51,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557112846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:23:51,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1847663324] [2022-07-21 17:23:51,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:23:51,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:23:51,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:23:51,084 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:23:51,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-21 17:23:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:23:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 17:23:51,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:23:51,237 INFO L390 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 [2022-07-21 17:23:51,384 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:23:51,385 INFO L390 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 12 treesize of output 12 [2022-07-21 17:23:51,424 INFO L390 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 11 treesize of output 7 [2022-07-21 17:23:51,530 INFO L390 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 5 treesize of output 3 [2022-07-21 17:23:55,695 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:23:55,695 INFO L390 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 19 treesize of output 22 [2022-07-21 17:23:55,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-21 17:23:55,883 INFO L390 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 12 treesize of output 14 [2022-07-21 17:23:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:23:55,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:23:56,006 WARN L833 $PredicateComparison]: unable to prove that (and (= (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_entry_point_~a10~0#1.base|)) (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_696) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_~a10~0#1.base|)))) is different from false [2022-07-21 17:23:56,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1847663324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:23:56,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:23:56,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-07-21 17:23:56,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132641995] [2022-07-21 17:23:56,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:23:56,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:23:56,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:23:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:23:56,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=805, Unknown=2, NotChecked=58, Total=992 [2022-07-21 17:23:56,033 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:24:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:24:08,525 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2022-07-21 17:24:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 17:24:08,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-07-21 17:24:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:24:08,527 INFO L225 Difference]: With dead ends: 178 [2022-07-21 17:24:08,527 INFO L226 Difference]: Without dead ends: 178 [2022-07-21 17:24:08,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=306, Invalid=1854, Unknown=6, NotChecked=90, Total=2256 [2022-07-21 17:24:08,528 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 175 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:24:08,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 856 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1022 Invalid, 0 Unknown, 172 Unchecked, 1.6s Time] [2022-07-21 17:24:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-21 17:24:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 120. [2022-07-21 17:24:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 106 states have internal predecessors, (123), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 17:24:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2022-07-21 17:24:08,532 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 36 [2022-07-21 17:24:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:24:08,532 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2022-07-21 17:24:08,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 17:24:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2022-07-21 17:24:08,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:24:08,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:24:08,534 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2022-07-21 17:24:08,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-21 17:24:08,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-07-21 17:24:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 17:24:08,940 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:24:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:24:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1653548802, now seen corresponding path program 1 times [2022-07-21 17:24:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:24:08,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379169936] [2022-07-21 17:24:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:24:08,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:24:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:24:08,941 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:24:08,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-21 17:24:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:24:09,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:24:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:24:09,064 INFO L390 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 [2022-07-21 17:24:09,150 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:24:09,150 INFO L390 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 12 treesize of output 12 [2022-07-21 17:24:09,178 INFO L390 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 11 treesize of output 7 [2022-07-21 17:24:11,277 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_31| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_44| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_44| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~a10~0#1.base_BEFORE_CALL_44|) |v_ULTIMATE.start_entry_point_~a10~0#1.offset_BEFORE_CALL_31|)))) is different from true [2022-07-21 17:24:13,483 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-21 17:24:13,483 INFO L390 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 55 treesize of output 41 [2022-07-21 17:24:13,488 INFO L390 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-07-21 17:24:13,660 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-21 17:24:13,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-07-21 17:24:13,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-07-21 17:24:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-21 17:24:13,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:24:18,650 INFO L390 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 140 treesize of output 112 [2022-07-21 17:24:18,751 INFO L356 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2022-07-21 17:24:18,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 190 [2022-07-21 17:24:39,611 WARN L233 SmtUtils]: Spent 17.05s on a formula simplification. DAG size of input: 27 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-21 17:24:39,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:24:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 17:24:39,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:24:39,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379169936] [2022-07-21 17:24:39,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379169936] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:24:39,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:24:39,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2022-07-21 17:24:39,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755452082] [2022-07-21 17:24:39,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:24:39,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 17:24:39,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:24:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 17:24:39,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=4, NotChecked=40, Total=506 [2022-07-21 17:24:39,816 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:24:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:24:40,989 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2022-07-21 17:24:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:24:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2022-07-21 17:24:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:24:40,990 INFO L225 Difference]: With dead ends: 112 [2022-07-21 17:24:40,990 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 17:24:40,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=4, NotChecked=54, Total=870 [2022-07-21 17:24:40,991 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 42 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:24:40,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 673 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 408 Invalid, 0 Unknown, 280 Unchecked, 0.8s Time] [2022-07-21 17:24:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 17:24:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-07-21 17:24:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 98 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 17:24:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2022-07-21 17:24:40,994 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 37 [2022-07-21 17:24:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:24:40,994 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2022-07-21 17:24:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-21 17:24:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2022-07-21 17:24:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 17:24:40,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:24:40,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:24:41,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-21 17:24:41,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:24:41,199 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-07-21 17:24:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:24:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash 219174838, now seen corresponding path program 1 times [2022-07-21 17:24:41,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:24:41,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142031561] [2022-07-21 17:24:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:24:41,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:24:41,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:24:41,201 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:24:41,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-21 17:24:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:24:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 17:24:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:24:41,656 INFO L390 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 11 treesize of output 7 [2022-07-21 17:24:41,667 INFO L390 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 11 treesize of output 7 [2022-07-21 17:24:41,821 INFO L390 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 15 treesize of output 7 [2022-07-21 17:24:41,926 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-21 17:24:41,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-07-21 17:24:42,275 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-21 17:24:42,275 INFO L390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2022-07-21 17:24:42,755 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 17:24:42,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2022-07-21 17:24:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 17:24:55,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:24:55,698 INFO L390 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 25 treesize of output 23 [2022-07-21 17:25:11,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:25:11,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142031561] [2022-07-21 17:25:11,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142031561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:25:11,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [310387444] [2022-07-21 17:25:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:25:11,039 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 17:25:11,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 17:25:11,041 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 17:25:11,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-07-21 17:25:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:25:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:25:11,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:25:11,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-21 17:25:11,852 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-21 17:25:11,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2022-07-21 17:25:22,115 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 17:25:22,116 INFO L390 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 37 treesize of output 38 [2022-07-21 17:25:22,254 INFO L390 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 34 treesize of output 22