./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 6c24879c 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-?-6c24879 [2022-07-12 18:49:13,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:49:13,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:49:13,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:49:13,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:49:13,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:49:13,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:49:13,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:49:13,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:49:13,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:49:13,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:49:13,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:49:13,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:49:13,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:49:13,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:49:13,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:49:13,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:49:13,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:49:13,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:49:13,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:49:13,224 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:49:13,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:49:13,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:49:13,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:49:13,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:49:13,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:49:13,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:49:13,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:49:13,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:49:13,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:49:13,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:49:13,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:49:13,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:49:13,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:49:13,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:49:13,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:49:13,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:49:13,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:49:13,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:49:13,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:49:13,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:49:13,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:49:13,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:49:13,260 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:49:13,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:49:13,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:49:13,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:49:13,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:49:13,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:49:13,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:49:13,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:49:13,263 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:49:13,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:49:13,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:49:13,264 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:49:13,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:49:13,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:49:13,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:49:13,265 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:49:13,265 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:49:13,265 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:49:13,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:49:13,267 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:49:13,267 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:49:13,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:49:13,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:49:13,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:49:13,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:49:13,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:49:13,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:49:13,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:49:13,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:49:13,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:49:13,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 [2022-07-12 18:49:13,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:49:13,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:49:13,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:49:13,485 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:49:13,485 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:49:13,487 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2022-07-12 18:49:13,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6bffd6d3/6ececc4e2f2341d28fa13f5f41f4e33c/FLAG55aa770bb [2022-07-12 18:49:13,982 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:49:13,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2022-07-12 18:49:14,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6bffd6d3/6ececc4e2f2341d28fa13f5f41f4e33c/FLAG55aa770bb [2022-07-12 18:49:14,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6bffd6d3/6ececc4e2f2341d28fa13f5f41f4e33c [2022-07-12 18:49:14,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:49:14,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:49:14,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:49:14,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:49:14,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:49:14,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:49:14" (1/1) ... [2022-07-12 18:49:14,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51eefac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:14, skipping insertion in model container [2022-07-12 18:49:14,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:49:14" (1/1) ... [2022-07-12 18:49:14,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:49:14,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:49:14,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:49:14,764 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) [2022-07-12 18:49:14,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d4ba953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:14, skipping insertion in model container [2022-07-12 18:49:14,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:49:14,766 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-12 18:49:14,767 INFO L158 Benchmark]: Toolchain (without parser) took 417.32ms. Allocated memory is still 92.3MB. Free memory was 57.1MB in the beginning and 65.4MB in the end (delta: -8.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-12 18:49:14,768 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 92.3MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 18:49:14,769 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.64ms. Allocated memory is still 92.3MB. Free memory was 56.9MB in the beginning and 65.4MB in the end (delta: -8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 18:49:14,771 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 92.3MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.64ms. Allocated memory is still 92.3MB. Free memory was 56.9MB in the beginning and 65.4MB in the end (delta: -8.5MB). Peak memory consumption was 10.5MB. 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-?-6c24879 [2022-07-12 18:49:16,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:49:16,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:49:16,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:49:16,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:49:16,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:49:16,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:49:16,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:49:16,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:49:16,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:49:16,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:49:16,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:49:16,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:49:16,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:49:16,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:49:16,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:49:16,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:49:16,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:49:16,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:49:16,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:49:16,553 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:49:16,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:49:16,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:49:16,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:49:16,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:49:16,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:49:16,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:49:16,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:49:16,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:49:16,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:49:16,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:49:16,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:49:16,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:49:16,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:49:16,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:49:16,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:49:16,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:49:16,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:49:16,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:49:16,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:49:16,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:49:16,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:49:16,579 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 18:49:16,616 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:49:16,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:49:16,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:49:16,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:49:16,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:49:16,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:49:16,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:49:16,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:49:16,619 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:49:16,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:49:16,620 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:49:16,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:49:16,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:49:16,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:49:16,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:49:16,621 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:49:16,621 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:49:16,621 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:49:16,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:49:16,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:49:16,622 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 18:49:16,622 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 18:49:16,622 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:49:16,622 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:49:16,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:49:16,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:49:16,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:49:16,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:49:16,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:49:16,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:49:16,624 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 18:49:16,624 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 18:49:16,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 18:49:16,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fd80c822f4c545ea9a48882a667e8fa2630e37e10bf15ea7aea35e48f16af74 [2022-07-12 18:49:16,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:49:16,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:49:16,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:49:16,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:49:16,941 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:49:16,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2022-07-12 18:49:17,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1550d932/1a639800507847988c5f9b07ee2f37e4/FLAG4c322a379 [2022-07-12 18:49:17,493 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:49:17,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test10-2.i [2022-07-12 18:49:17,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1550d932/1a639800507847988c5f9b07ee2f37e4/FLAG4c322a379 [2022-07-12 18:49:17,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1550d932/1a639800507847988c5f9b07ee2f37e4 [2022-07-12 18:49:17,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:49:17,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:49:17,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:49:17,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:49:17,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:49:17,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:49:17" (1/1) ... [2022-07-12 18:49:17,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633ce66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:17, skipping insertion in model container [2022-07-12 18:49:17,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:49:17" (1/1) ... [2022-07-12 18:49:17,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:49:18,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:49:18,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:49:18,451 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-12 18:49:18,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:49:18,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:49:18,524 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:49:18,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:49:18,600 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:49:18,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18 WrapperNode [2022-07-12 18:49:18,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:49:18,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:49:18,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:49:18,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:49:18,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,642 INFO L137 Inliner]: procedures = 167, calls = 92, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 78 [2022-07-12 18:49:18,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:49:18,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:49:18,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:49:18,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:49:18,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:49:18,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:49:18,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:49:18,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:49:18,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (1/1) ... [2022-07-12 18:49:18,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:49:18,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:18,695 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) [2022-07-12 18:49:18,698 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 [2022-07-12 18:49:18,723 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 18:49:18,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 18:49:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:49:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:49:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 18:49:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 18:49:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:49:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 18:49:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:49:18,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:49:18,810 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:49:18,812 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:49:19,223 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:49:19,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:49:19,229 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 18:49:19,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:49:19 BoogieIcfgContainer [2022-07-12 18:49:19,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:49:19,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:49:19,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:49:19,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:49:19,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:49:17" (1/3) ... [2022-07-12 18:49:19,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641e1fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:49:19, skipping insertion in model container [2022-07-12 18:49:19,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:49:18" (2/3) ... [2022-07-12 18:49:19,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641e1fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:49:19, skipping insertion in model container [2022-07-12 18:49:19,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:49:19" (3/3) ... [2022-07-12 18:49:19,237 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test10-2.i [2022-07-12 18:49:19,248 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:49:19,248 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2022-07-12 18:49:19,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:49:19,289 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@5af25626, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@263edf1c [2022-07-12 18:49:19,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-07-12 18:49:19,293 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) [2022-07-12 18:49:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:49:19,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:19,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:19,299 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)] === [2022-07-12 18:49:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1192529059, now seen corresponding path program 1 times [2022-07-12 18:49:19,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:19,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662913102] [2022-07-12 18:49:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:19,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:19,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:19,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 18:49:19,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 18:49:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:49:19,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:19,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:19,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:19,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662913102] [2022-07-12 18:49:19,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662913102] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:19,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:19,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:49:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161306623] [2022-07-12 18:49:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:49:19,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:19,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:49:19,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:19,502 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) [2022-07-12 18:49:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:19,685 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2022-07-12 18:49:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:49:19,687 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 [2022-07-12 18:49:19,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:19,695 INFO L225 Difference]: With dead ends: 180 [2022-07-12 18:49:19,695 INFO L226 Difference]: Without dead ends: 176 [2022-07-12 18:49:19,696 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 [2022-07-12 18:49:19,699 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:19,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 485 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:49:19,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-12 18:49:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 95. [2022-07-12 18:49:19,735 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) [2022-07-12 18:49:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2022-07-12 18:49:19,737 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 11 [2022-07-12 18:49:19,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:19,738 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2022-07-12 18:49:19,738 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) [2022-07-12 18:49:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2022-07-12 18:49:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:49:19,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:19,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:19,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 18:49:19,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:19,944 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)] === [2022-07-12 18:49:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2080032740, now seen corresponding path program 1 times [2022-07-12 18:49:19,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:19,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445900185] [2022-07-12 18:49:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:19,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:19,951 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) [2022-07-12 18:49:19,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 18:49:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:49:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:20,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:20,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445900185] [2022-07-12 18:49:20,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445900185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:20,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:20,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:49:20,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585335561] [2022-07-12 18:49:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:20,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:49:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:49:20,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:49:20,047 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) [2022-07-12 18:49:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:20,296 INFO L93 Difference]: Finished difference Result 163 states and 179 transitions. [2022-07-12 18:49:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:49:20,297 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 [2022-07-12 18:49:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:20,298 INFO L225 Difference]: With dead ends: 163 [2022-07-12 18:49:20,299 INFO L226 Difference]: Without dead ends: 161 [2022-07-12 18:49:20,299 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 [2022-07-12 18:49:20,300 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 [2022-07-12 18:49:20,300 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] [2022-07-12 18:49:20,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-12 18:49:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2022-07-12 18:49:20,312 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) [2022-07-12 18:49:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-07-12 18:49:20,313 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 11 [2022-07-12 18:49:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:20,313 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-07-12 18:49:20,314 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) [2022-07-12 18:49:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-07-12 18:49:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:49:20,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:20,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:20,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:20,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:20,520 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)] === [2022-07-12 18:49:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash -895923568, now seen corresponding path program 1 times [2022-07-12 18:49:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:20,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398980745] [2022-07-12 18:49:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:20,521 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:20,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:20,523 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) [2022-07-12 18:49:20,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 18:49:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:49:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:20,597 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 [2022-07-12 18:49:20,690 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:49:20,691 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 [2022-07-12 18:49:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:20,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:20,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:20,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398980745] [2022-07-12 18:49:20,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398980745] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:20,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:20,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-12 18:49:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099684837] [2022-07-12 18:49:20,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:20,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 18:49:20,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:20,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 18:49:20,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:49:20,893 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) [2022-07-12 18:49:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:21,259 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-07-12 18:49:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:49:21,259 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 [2022-07-12 18:49:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:21,260 INFO L225 Difference]: With dead ends: 129 [2022-07-12 18:49:21,260 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 18:49:21,261 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 [2022-07-12 18:49:21,262 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 [2022-07-12 18:49:21,262 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] [2022-07-12 18:49:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 18:49:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2022-07-12 18:49:21,273 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) [2022-07-12 18:49:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-07-12 18:49:21,275 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 15 [2022-07-12 18:49:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:21,276 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-07-12 18:49:21,276 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) [2022-07-12 18:49:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-07-12 18:49:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:49:21,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:21,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:21,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:21,487 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)] === [2022-07-12 18:49:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -895923567, now seen corresponding path program 1 times [2022-07-12 18:49:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577364773] [2022-07-12 18:49:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:21,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:21,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:21,490 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) [2022-07-12 18:49:21,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 18:49:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:49:21,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:21,581 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 [2022-07-12 18:49:25,775 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:49:25,776 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 [2022-07-12 18:49:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:25,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:26,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577364773] [2022-07-12 18:49:26,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577364773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209037850] [2022-07-12 18:49:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:26,029 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:49:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:49:26,030 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) [2022-07-12 18:49:26,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-07-12 18:49:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:26,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:49:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:26,135 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 [2022-07-12 18:49:26,146 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 [2022-07-12 18:49:32,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:49:32,416 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 [2022-07-12 18:49:32,427 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:49:32,428 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 [2022-07-12 18:49:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:32,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:36,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209037850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:36,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:36,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-07-12 18:49:36,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601723090] [2022-07-12 18:49:36,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:49:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:36,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:49:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=224, Unknown=5, NotChecked=0, Total=272 [2022-07-12 18:49:36,906 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) [2022-07-12 18:49:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:39,741 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2022-07-12 18:49:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:49:39,742 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 [2022-07-12 18:49:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:39,743 INFO L225 Difference]: With dead ends: 177 [2022-07-12 18:49:39,743 INFO L226 Difference]: Without dead ends: 177 [2022-07-12 18:49:39,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=56, Invalid=280, Unknown=6, NotChecked=0, Total=342 [2022-07-12 18:49:39,745 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 135 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:39,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 598 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 567 Invalid, 0 Unknown, 156 Unchecked, 0.7s Time] [2022-07-12 18:49:39,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-12 18:49:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 137. [2022-07-12 18:49:39,753 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) [2022-07-12 18:49:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 188 transitions. [2022-07-12 18:49:39,755 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 188 transitions. Word has length 15 [2022-07-12 18:49:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:39,755 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 188 transitions. [2022-07-12 18:49:39,755 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) [2022-07-12 18:49:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 188 transitions. [2022-07-12 18:49:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 18:49:39,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:39,756 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:39,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:39,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:40,164 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 [2022-07-12 18:49:40,165 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)] === [2022-07-12 18:49:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1602092369, now seen corresponding path program 1 times [2022-07-12 18:49:40,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:40,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934228754] [2022-07-12 18:49:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:40,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:40,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:40,171 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) [2022-07-12 18:49:40,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 18:49:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:40,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:49:40,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:40,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:40,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:40,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934228754] [2022-07-12 18:49:40,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934228754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:40,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:40,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:49:40,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235363707] [2022-07-12 18:49:40,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:40,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:49:40,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:40,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:49:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:49:40,268 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) [2022-07-12 18:49:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:40,340 INFO L93 Difference]: Finished difference Result 122 states and 163 transitions. [2022-07-12 18:49:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:49:40,341 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 [2022-07-12 18:49:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:40,341 INFO L225 Difference]: With dead ends: 122 [2022-07-12 18:49:40,341 INFO L226 Difference]: Without dead ends: 120 [2022-07-12 18:49:40,342 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 [2022-07-12 18:49:40,342 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 [2022-07-12 18:49:40,343 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] [2022-07-12 18:49:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-12 18:49:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-12 18:49:40,350 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) [2022-07-12 18:49:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 161 transitions. [2022-07-12 18:49:40,351 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 161 transitions. Word has length 15 [2022-07-12 18:49:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:40,352 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 161 transitions. [2022-07-12 18:49:40,352 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) [2022-07-12 18:49:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 161 transitions. [2022-07-12 18:49:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:49:40,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:40,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:40,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:40,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:40,560 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)] === [2022-07-12 18:49:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash 684574475, now seen corresponding path program 1 times [2022-07-12 18:49:40,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:40,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088604985] [2022-07-12 18:49:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:40,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:40,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:40,562 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) [2022-07-12 18:49:40,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 18:49:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:40,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 18:49:40,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:40,637 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 [2022-07-12 18:49:40,654 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 [2022-07-12 18:49:40,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:40,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:49:40,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:40,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088604985] [2022-07-12 18:49:40,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088604985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:49:40,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:49:40,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:49:40,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643200839] [2022-07-12 18:49:40,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:49:40,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:49:40,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:49:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:49:40,669 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) [2022-07-12 18:49:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:40,846 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2022-07-12 18:49:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:49:40,848 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 [2022-07-12 18:49:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:40,849 INFO L225 Difference]: With dead ends: 130 [2022-07-12 18:49:40,849 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 18:49:40,849 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 [2022-07-12 18:49:40,850 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:40,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 401 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:49:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 18:49:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-07-12 18:49:40,855 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) [2022-07-12 18:49:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2022-07-12 18:49:40,856 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 20 [2022-07-12 18:49:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:40,856 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2022-07-12 18:49:40,856 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) [2022-07-12 18:49:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2022-07-12 18:49:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 18:49:40,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:40,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:40,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:41,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:41,064 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)] === [2022-07-12 18:49:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1122879988, now seen corresponding path program 1 times [2022-07-12 18:49:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:41,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397637541] [2022-07-12 18:49:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:41,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:41,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:41,067 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) [2022-07-12 18:49:41,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 18:49:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:41,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:49:41,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:49:41,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:41,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397637541] [2022-07-12 18:49:41,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397637541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:41,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:41,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-12 18:49:41,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878792625] [2022-07-12 18:49:41,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:41,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:49:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:41,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:49:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:49:41,394 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) [2022-07-12 18:49:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:41,670 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2022-07-12 18:49:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 18:49:41,671 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 [2022-07-12 18:49:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:41,672 INFO L225 Difference]: With dead ends: 127 [2022-07-12 18:49:41,672 INFO L226 Difference]: Without dead ends: 127 [2022-07-12 18:49:41,672 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 [2022-07-12 18:49:41,673 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 [2022-07-12 18:49:41,673 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] [2022-07-12 18:49:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-12 18:49:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-07-12 18:49:41,684 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) [2022-07-12 18:49:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2022-07-12 18:49:41,685 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 20 [2022-07-12 18:49:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:41,685 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2022-07-12 18:49:41,685 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) [2022-07-12 18:49:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2022-07-12 18:49:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:49:41,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:41,686 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] [2022-07-12 18:49:41,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-12 18:49:41,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:41,897 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)] === [2022-07-12 18:49:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1782681151, now seen corresponding path program 1 times [2022-07-12 18:49:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:41,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940615671] [2022-07-12 18:49:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:41,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:41,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:41,899 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) [2022-07-12 18:49:41,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 18:49:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:49:41,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:42,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:46,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940615671] [2022-07-12 18:49:46,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940615671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1409805675] [2022-07-12 18:49:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:46,283 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:49:46,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:49:46,286 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) [2022-07-12 18:49:46,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-07-12 18:49:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:46,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:49:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:46,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:50,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1409805675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:50,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:50,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-12 18:49:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532627294] [2022-07-12 18:49:50,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:50,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:49:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:49:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-12 18:49:50,736 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) [2022-07-12 18:49:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:50,927 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2022-07-12 18:49:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:49:50,927 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 [2022-07-12 18:49:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:50,928 INFO L225 Difference]: With dead ends: 136 [2022-07-12 18:49:50,928 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 18:49:50,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-12 18:49:50,929 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 [2022-07-12 18:49:50,929 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] [2022-07-12 18:49:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 18:49:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-07-12 18:49:50,934 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) [2022-07-12 18:49:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 162 transitions. [2022-07-12 18:49:50,935 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 162 transitions. Word has length 23 [2022-07-12 18:49:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:50,939 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 162 transitions. [2022-07-12 18:49:50,940 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) [2022-07-12 18:49:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 162 transitions. [2022-07-12 18:49:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:49:50,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:50,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:50,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:51,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-12 18:49:51,345 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 [2022-07-12 18:49:51,346 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)] === [2022-07-12 18:49:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash -931351798, now seen corresponding path program 1 times [2022-07-12 18:49:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:51,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256222629] [2022-07-12 18:49:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:51,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:51,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:51,347 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) [2022-07-12 18:49:51,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 18:49:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:51,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:49:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:51,427 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 [2022-07-12 18:49:51,450 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 [2022-07-12 18:49:51,474 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 [2022-07-12 18:49:51,536 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:49:51,536 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 [2022-07-12 18:49:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:51,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:49:51,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:51,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256222629] [2022-07-12 18:49:51,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256222629] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:51,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:49:51,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-12 18:49:51,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891789675] [2022-07-12 18:49:51,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:51,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:49:51,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:49:51,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:49:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:49:51,688 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) [2022-07-12 18:49:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:52,004 INFO L93 Difference]: Finished difference Result 140 states and 179 transitions. [2022-07-12 18:49:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:49:52,005 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 [2022-07-12 18:49:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:52,006 INFO L225 Difference]: With dead ends: 140 [2022-07-12 18:49:52,006 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 18:49:52,006 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 [2022-07-12 18:49:52,007 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 8 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-12 18:49:52,007 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] [2022-07-12 18:49:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 18:49:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-07-12 18:49:52,013 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) [2022-07-12 18:49:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2022-07-12 18:49:52,014 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 25 [2022-07-12 18:49:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:52,015 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2022-07-12 18:49:52,015 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) [2022-07-12 18:49:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2022-07-12 18:49:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:49:52,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:52,016 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:49:52,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:52,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:49:52,225 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)] === [2022-07-12 18:49:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -931351797, now seen corresponding path program 1 times [2022-07-12 18:49:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:49:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294111528] [2022-07-12 18:49:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:52,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:49:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:49:52,231 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) [2022-07-12 18:49:52,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 18:49:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:52,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 18:49:52,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:52,330 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 [2022-07-12 18:49:52,370 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 [2022-07-12 18:49:52,377 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 [2022-07-12 18:49:52,413 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 [2022-07-12 18:49:52,416 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 [2022-07-12 18:49:56,530 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:49:56,530 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 [2022-07-12 18:49:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:49:56,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:56,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:49:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294111528] [2022-07-12 18:49:56,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294111528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [985532539] [2022-07-12 18:49:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:49:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:49:56,800 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) [2022-07-12 18:49:56,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-12 18:49:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:49:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:56,943 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 [2022-07-12 18:49:56,949 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 [2022-07-12 18:49:57,021 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 [2022-07-12 18:49:57,028 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 [2022-07-12 18:49:57,097 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 [2022-07-12 18:49:57,102 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 [2022-07-12 18:50:01,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:50:01,259 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 [2022-07-12 18:50:01,268 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:01,268 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 [2022-07-12 18:50:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:50:01,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:05,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [985532539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:05,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:05,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-12 18:50:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388751611] [2022-07-12 18:50:05,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:05,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 18:50:05,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 18:50:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=289, Unknown=5, NotChecked=0, Total=342 [2022-07-12 18:50:05,503 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) [2022-07-12 18:50:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:10,129 INFO L93 Difference]: Finished difference Result 140 states and 179 transitions. [2022-07-12 18:50:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:50:10,129 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 [2022-07-12 18:50:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:10,130 INFO L225 Difference]: With dead ends: 140 [2022-07-12 18:50:10,130 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 18:50:10,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=76, Invalid=423, Unknown=7, NotChecked=0, Total=506 [2022-07-12 18:50:10,131 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 9 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:10,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 633 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 424 Invalid, 0 Unknown, 87 Unchecked, 0.5s Time] [2022-07-12 18:50:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 18:50:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-07-12 18:50:10,135 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) [2022-07-12 18:50:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 177 transitions. [2022-07-12 18:50:10,136 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 177 transitions. Word has length 25 [2022-07-12 18:50:10,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:10,137 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 177 transitions. [2022-07-12 18:50:10,137 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) [2022-07-12 18:50:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 177 transitions. [2022-07-12 18:50:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:50:10,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:10,138 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] [2022-07-12 18:50:10,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:10,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-12 18:50:10,538 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 [2022-07-12 18:50:10,539 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)] === [2022-07-12 18:50:10,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:10,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1436910423, now seen corresponding path program 1 times [2022-07-12 18:50:10,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:10,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917227030] [2022-07-12 18:50:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:10,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:10,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:10,541 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) [2022-07-12 18:50:10,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-12 18:50:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:10,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:50:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:10,634 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 [2022-07-12 18:50:10,644 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 [2022-07-12 18:50:10,665 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 [2022-07-12 18:50:10,669 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 [2022-07-12 18:50:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:50:10,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:50:10,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:10,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917227030] [2022-07-12 18:50:10,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917227030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:50:10,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:50:10,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 18:50:10,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986930615] [2022-07-12 18:50:10,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:50:10,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:50:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:50:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:50:10,685 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) [2022-07-12 18:50:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:10,816 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2022-07-12 18:50:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:50:10,817 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 [2022-07-12 18:50:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:10,817 INFO L225 Difference]: With dead ends: 132 [2022-07-12 18:50:10,818 INFO L226 Difference]: Without dead ends: 126 [2022-07-12 18:50:10,818 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 [2022-07-12 18:50:10,819 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 [2022-07-12 18:50:10,819 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] [2022-07-12 18:50:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-12 18:50:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-07-12 18:50:10,822 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) [2022-07-12 18:50:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2022-07-12 18:50:10,823 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 25 [2022-07-12 18:50:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:10,823 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2022-07-12 18:50:10,823 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) [2022-07-12 18:50:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2022-07-12 18:50:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:50:10,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:10,824 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] [2022-07-12 18:50:10,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-12 18:50:11,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:11,033 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)] === [2022-07-12 18:50:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:11,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1675880117, now seen corresponding path program 1 times [2022-07-12 18:50:11,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:11,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522048830] [2022-07-12 18:50:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:11,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:11,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:11,035 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) [2022-07-12 18:50:11,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 18:50:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:50:11,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:11,115 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 [2022-07-12 18:50:11,158 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:50:11,159 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 [2022-07-12 18:50:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:50:11,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:50:11,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522048830] [2022-07-12 18:50:11,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522048830] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:50:11,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:50:11,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:50:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262150228] [2022-07-12 18:50:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:50:11,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:50:11,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:50:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:50:11,170 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) [2022-07-12 18:50:11,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:11,297 INFO L93 Difference]: Finished difference Result 146 states and 179 transitions. [2022-07-12 18:50:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:50:11,297 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 [2022-07-12 18:50:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:11,298 INFO L225 Difference]: With dead ends: 146 [2022-07-12 18:50:11,298 INFO L226 Difference]: Without dead ends: 146 [2022-07-12 18:50:11,298 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 [2022-07-12 18:50:11,299 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 49 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:11,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 141 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-07-12 18:50:11,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-12 18:50:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2022-07-12 18:50:11,302 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) [2022-07-12 18:50:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2022-07-12 18:50:11,303 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 27 [2022-07-12 18:50:11,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:11,304 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2022-07-12 18:50:11,304 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) [2022-07-12 18:50:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2022-07-12 18:50:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:50:11,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:11,305 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] [2022-07-12 18:50:11,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:11,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:11,511 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)] === [2022-07-12 18:50:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1675880116, now seen corresponding path program 1 times [2022-07-12 18:50:11,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:11,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344557211] [2022-07-12 18:50:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:11,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:11,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:11,514 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) [2022-07-12 18:50:11,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 18:50:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:11,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:50:11,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:11,604 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 [2022-07-12 18:50:11,610 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 [2022-07-12 18:50:11,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:50:11,789 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 [2022-07-12 18:50:11,803 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:11,804 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 [2022-07-12 18:50:11,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:50:11,932 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 [2022-07-12 18:50:11,944 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:11,945 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 [2022-07-12 18:50:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:50:11,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:14,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:14,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344557211] [2022-07-12 18:50:14,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344557211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:14,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [547111178] [2022-07-12 18:50:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:14,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:14,335 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) [2022-07-12 18:50:14,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-12 18:50:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:14,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:50:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:14,452 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 [2022-07-12 18:50:14,457 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 [2022-07-12 18:50:14,564 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:14,565 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 [2022-07-12 18:50:14,573 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 [2022-07-12 18:50:14,607 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 [2022-07-12 18:50:14,664 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 [2022-07-12 18:50:16,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:50:16,743 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 [2022-07-12 18:50:16,752 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:16,752 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 [2022-07-12 18:50:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:50:16,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:20,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [547111178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:20,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:20,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 11 [2022-07-12 18:50:20,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145620954] [2022-07-12 18:50:20,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:20,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:50:20,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:50:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:50:20,946 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) [2022-07-12 18:50:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:21,557 INFO L93 Difference]: Finished difference Result 171 states and 203 transitions. [2022-07-12 18:50:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:50:21,559 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 [2022-07-12 18:50:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:21,560 INFO L225 Difference]: With dead ends: 171 [2022-07-12 18:50:21,560 INFO L226 Difference]: Without dead ends: 171 [2022-07-12 18:50:21,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:50:21,561 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:21,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 276 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 471 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-07-12 18:50:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-12 18:50:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2022-07-12 18:50:21,565 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) [2022-07-12 18:50:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2022-07-12 18:50:21,565 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 27 [2022-07-12 18:50:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:21,566 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2022-07-12 18:50:21,566 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) [2022-07-12 18:50:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2022-07-12 18:50:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:50:21,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:21,567 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] [2022-07-12 18:50:21,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:21,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:21,980 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 [2022-07-12 18:50:21,980 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)] === [2022-07-12 18:50:21,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash -412676065, now seen corresponding path program 1 times [2022-07-12 18:50:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:21,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997648679] [2022-07-12 18:50:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:21,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:21,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:21,982 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) [2022-07-12 18:50:21,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-12 18:50:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:22,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 18:50:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:22,117 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 [2022-07-12 18:50:22,123 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 [2022-07-12 18:50:22,152 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 [2022-07-12 18:50:22,177 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 [2022-07-12 18:50:22,247 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-12 18:50:22,247 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 [2022-07-12 18:50:22,317 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:50:22,317 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 [2022-07-12 18:50:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:50:22,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:22,446 INFO L356 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-07-12 18:50:22,447 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 68 treesize of output 67 [2022-07-12 18:50:22,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:22,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997648679] [2022-07-12 18:50:22,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997648679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:22,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492568224] [2022-07-12 18:50:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:22,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:22,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:22,505 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) [2022-07-12 18:50:22,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-12 18:50:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:50:22,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:22,655 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 [2022-07-12 18:50:22,732 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:22,733 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 [2022-07-12 18:50:22,762 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 [2022-07-12 18:50:24,839 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 [2022-07-12 18:50:24,911 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:50:24,912 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 [2022-07-12 18:50:24,958 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 [2022-07-12 18:50:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-12 18:50:24,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:25,002 INFO L356 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-07-12 18:50:25,002 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 22 treesize of output 21 [2022-07-12 18:50:25,010 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 [2022-07-12 18:50:25,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [492568224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:25,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:25,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2022-07-12 18:50:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432712808] [2022-07-12 18:50:25,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:25,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:50:25,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:50:25,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=450, Unknown=2, NotChecked=86, Total=600 [2022-07-12 18:50:25,019 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 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) [2022-07-12 18:50:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:34,449 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2022-07-12 18:50:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:50:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 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 [2022-07-12 18:50:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:34,451 INFO L225 Difference]: With dead ends: 170 [2022-07-12 18:50:34,451 INFO L226 Difference]: Without dead ends: 170 [2022-07-12 18:50:34,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=246, Invalid=1480, Unknown=4, NotChecked=162, Total=1892 [2022-07-12 18:50:34,452 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 210 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:34,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 671 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 994 Invalid, 0 Unknown, 146 Unchecked, 0.8s Time] [2022-07-12 18:50:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-12 18:50:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 107. [2022-07-12 18:50:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 69 states have (on average 1.7246376811594204) internal successors, (119), 97 states have internal predecessors, (119), 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) [2022-07-12 18:50:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2022-07-12 18:50:34,455 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 28 [2022-07-12 18:50:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:34,455 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2022-07-12 18:50:34,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 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) [2022-07-12 18:50:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2022-07-12 18:50:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 18:50:34,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:34,456 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] [2022-07-12 18:50:34,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:34,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:34,858 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 [2022-07-12 18:50:34,858 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)] === [2022-07-12 18:50:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:34,859 INFO L85 PathProgramCache]: Analyzing trace with hash -412676064, now seen corresponding path program 1 times [2022-07-12 18:50:34,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:34,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151429741] [2022-07-12 18:50:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:34,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:34,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:34,860 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) [2022-07-12 18:50:34,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-12 18:50:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:34,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:50:34,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:34,946 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 [2022-07-12 18:50:34,998 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:34,998 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 12 treesize of output 12 [2022-07-12 18:50:35,025 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 [2022-07-12 18:50:35,031 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 [2022-07-12 18:50:35,195 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:50:35,195 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 [2022-07-12 18:50:35,198 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 [2022-07-12 18:50:35,239 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 [2022-07-12 18:50:35,243 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 [2022-07-12 18:50:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:50:35,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:35,418 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:50:35,418 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 [2022-07-12 18:50:35,492 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$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_295) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse1 (bvadd .cse1 (_ bv4 32))))))) (and (or (forall ((v_ArrVal_294 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_294) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|) |c_ULTIMATE.start_entry_point_#t~mem47#1.base|)) (and .cse0 (forall ((v_prenex_5 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_5) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))))) .cse0 (forall ((v_prenex_5 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_5) |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 [2022-07-12 18:50:35,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:35,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151429741] [2022-07-12 18:50:35,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151429741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:35,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1464176858] [2022-07-12 18:50:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:35,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:35,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:35,536 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) [2022-07-12 18:50:35,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-07-12 18:50:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:35,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 18:50:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:35,690 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 [2022-07-12 18:50:35,716 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:35,716 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 [2022-07-12 18:50:35,724 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 [2022-07-12 18:50:35,729 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 [2022-07-12 18:50:35,867 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:50:35,867 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 [2022-07-12 18:50:35,871 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 [2022-07-12 18:50:35,894 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 [2022-07-12 18:50:35,899 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 [2022-07-12 18:50:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:50:35,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:35,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:50:35,985 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 [2022-07-12 18:50:36,046 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_320 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$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$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_ArrVal_320) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))))) (forall ((v_prenex_8 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| v_prenex_8) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2022-07-12 18:50:36,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1464176858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:36,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:36,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-12 18:50:36,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035169107] [2022-07-12 18:50:36,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:36,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:50:36,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:50:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=178, Unknown=2, NotChecked=54, Total=272 [2022-07-12 18:50:36,080 INFO L87 Difference]: Start difference. First operand 107 states and 128 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) [2022-07-12 18:50:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:36,664 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2022-07-12 18:50:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:50:36,665 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 [2022-07-12 18:50:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:36,665 INFO L225 Difference]: With dead ends: 132 [2022-07-12 18:50:36,666 INFO L226 Difference]: Without dead ends: 132 [2022-07-12 18:50:36,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=422, Unknown=2, NotChecked=86, Total=600 [2022-07-12 18:50:36,667 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 85 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:36,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 339 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 431 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-07-12 18:50:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-12 18:50:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2022-07-12 18:50:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.710144927536232) internal successors, (118), 96 states have internal predecessors, (118), 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) [2022-07-12 18:50:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2022-07-12 18:50:36,670 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 28 [2022-07-12 18:50:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:36,670 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2022-07-12 18:50:36,671 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) [2022-07-12 18:50:36,671 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2022-07-12 18:50:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:50:36,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:36,671 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] [2022-07-12 18:50:36,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:36,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:37,073 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 [2022-07-12 18:50:37,074 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)] === [2022-07-12 18:50:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1444706688, now seen corresponding path program 1 times [2022-07-12 18:50:37,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:37,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796150742] [2022-07-12 18:50:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:37,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:37,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:37,076 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) [2022-07-12 18:50:37,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 18:50:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:37,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:50:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:50:37,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:50:37,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:37,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796150742] [2022-07-12 18:50:37,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796150742] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:50:37,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:50:37,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:50:37,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903992372] [2022-07-12 18:50:37,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:50:37,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:50:37,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:50:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:50:37,169 INFO L87 Difference]: Start difference. First operand 106 states and 127 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) [2022-07-12 18:50:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:37,285 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2022-07-12 18:50:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:50:37,286 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 [2022-07-12 18:50:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:37,286 INFO L225 Difference]: With dead ends: 105 [2022-07-12 18:50:37,286 INFO L226 Difference]: Without dead ends: 105 [2022-07-12 18:50:37,287 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 [2022-07-12 18:50:37,287 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 30 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:37,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 124 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:50:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-12 18:50:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-07-12 18:50:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.6956521739130435) internal successors, (117), 95 states have internal predecessors, (117), 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) [2022-07-12 18:50:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2022-07-12 18:50:37,290 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 30 [2022-07-12 18:50:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:37,290 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2022-07-12 18:50:37,290 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) [2022-07-12 18:50:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2022-07-12 18:50:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 18:50:37,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:37,291 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] [2022-07-12 18:50:37,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:37,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:37,492 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)] === [2022-07-12 18:50:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1444706687, now seen corresponding path program 1 times [2022-07-12 18:50:37,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:37,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412322655] [2022-07-12 18:50:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:37,494 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) [2022-07-12 18:50:37,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 18:50:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:37,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:50:37,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:50:37,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:37,721 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 [2022-07-12 18:50:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:50:37,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:37,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412322655] [2022-07-12 18:50:37,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412322655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:50:37,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:37,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-12 18:50:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203687351] [2022-07-12 18:50:37,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:50:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:50:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:50:37,832 INFO L87 Difference]: Start difference. First operand 105 states and 126 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) [2022-07-12 18:50:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:38,150 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2022-07-12 18:50:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:50:38,150 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 [2022-07-12 18:50:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:38,151 INFO L225 Difference]: With dead ends: 103 [2022-07-12 18:50:38,151 INFO L226 Difference]: Without dead ends: 103 [2022-07-12 18:50:38,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:50:38,152 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 91 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:38,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 351 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:50:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-12 18:50:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2022-07-12 18:50:38,154 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) [2022-07-12 18:50:38,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2022-07-12 18:50:38,155 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 30 [2022-07-12 18:50:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:38,155 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2022-07-12 18:50:38,155 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) [2022-07-12 18:50:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2022-07-12 18:50:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:50:38,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:38,156 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] [2022-07-12 18:50:38,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:38,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:38,365 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)] === [2022-07-12 18:50:38,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234894, now seen corresponding path program 1 times [2022-07-12 18:50:38,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:38,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318019592] [2022-07-12 18:50:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:38,367 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) [2022-07-12 18:50:38,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 18:50:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:38,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:50:38,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:38,489 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 [2022-07-12 18:50:38,494 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 [2022-07-12 18:50:38,527 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 [2022-07-12 18:50:38,634 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-12 18:50:38,634 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 [2022-07-12 18:50:38,671 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 [2022-07-12 18:50:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:50:38,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:50:38,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318019592] [2022-07-12 18:50:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318019592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:50:38,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:50:38,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-12 18:50:38,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242205337] [2022-07-12 18:50:38,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:50:38,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 18:50:38,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:38,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 18:50:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:50:38,686 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) [2022-07-12 18:50:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:38,948 INFO L93 Difference]: Finished difference Result 176 states and 205 transitions. [2022-07-12 18:50:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:50:38,949 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 [2022-07-12 18:50:38,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:38,950 INFO L225 Difference]: With dead ends: 176 [2022-07-12 18:50:38,950 INFO L226 Difference]: Without dead ends: 176 [2022-07-12 18:50:38,950 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 [2022-07-12 18:50:38,951 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 90 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:38,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 647 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-07-12 18:50:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-07-12 18:50:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 107. [2022-07-12 18:50:38,953 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) [2022-07-12 18:50:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 123 transitions. [2022-07-12 18:50:38,954 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 123 transitions. Word has length 31 [2022-07-12 18:50:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:38,954 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 123 transitions. [2022-07-12 18:50:38,954 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) [2022-07-12 18:50:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 123 transitions. [2022-07-12 18:50:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:50:38,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:38,955 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] [2022-07-12 18:50:38,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:39,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:39,170 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)] === [2022-07-12 18:50:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234347, now seen corresponding path program 1 times [2022-07-12 18:50:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:39,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319076324] [2022-07-12 18:50:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:39,170 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:39,172 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) [2022-07-12 18:50:39,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 18:50:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:50:39,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:39,269 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 [2022-07-12 18:50:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:50:39,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:50:39,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:39,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319076324] [2022-07-12 18:50:39,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319076324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:50:39,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:50:39,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:50:39,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455570186] [2022-07-12 18:50:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:50:39,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:50:39,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:39,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:50:39,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:50:39,278 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) [2022-07-12 18:50:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:39,454 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2022-07-12 18:50:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:50:39,454 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 [2022-07-12 18:50:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:39,455 INFO L225 Difference]: With dead ends: 112 [2022-07-12 18:50:39,455 INFO L226 Difference]: Without dead ends: 112 [2022-07-12 18:50:39,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:50:39,456 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 16 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:39,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 221 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:50:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-12 18:50:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2022-07-12 18:50:39,458 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) [2022-07-12 18:50:39,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2022-07-12 18:50:39,459 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 31 [2022-07-12 18:50:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:39,459 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2022-07-12 18:50:39,460 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) [2022-07-12 18:50:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2022-07-12 18:50:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:50:39,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:39,460 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] [2022-07-12 18:50:39,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-12 18:50:39,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:39,668 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)] === [2022-07-12 18:50:39,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:39,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1836234346, now seen corresponding path program 1 times [2022-07-12 18:50:39,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:39,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660822984] [2022-07-12 18:50:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:39,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:39,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:39,672 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) [2022-07-12 18:50:39,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 18:50:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:50:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:39,850 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 [2022-07-12 18:50:39,852 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 [2022-07-12 18:50:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:50:39,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:50:39,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:39,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660822984] [2022-07-12 18:50:39,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660822984] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:50:39,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:50:39,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 18:50:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933488941] [2022-07-12 18:50:39,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:50:39,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:50:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:50:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:50:39,888 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) [2022-07-12 18:50:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:40,393 INFO L93 Difference]: Finished difference Result 118 states and 133 transitions. [2022-07-12 18:50:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:50:40,394 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 [2022-07-12 18:50:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:40,394 INFO L225 Difference]: With dead ends: 118 [2022-07-12 18:50:40,395 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 18:50:40,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:50:40,395 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 20 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:40,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 242 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:50:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 18:50:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2022-07-12 18:50:40,398 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) [2022-07-12 18:50:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2022-07-12 18:50:40,399 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 31 [2022-07-12 18:50:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:40,399 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2022-07-12 18:50:40,399 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) [2022-07-12 18:50:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2022-07-12 18:50:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 18:50:40,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:40,400 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] [2022-07-12 18:50:40,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-12 18:50:40,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:40,609 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)] === [2022-07-12 18:50:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2032748399, now seen corresponding path program 1 times [2022-07-12 18:50:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:40,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158379] [2022-07-12 18:50:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:40,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:40,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:40,611 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) [2022-07-12 18:50:40,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-12 18:50:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:40,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:50:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:40,694 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 [2022-07-12 18:50:40,747 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:40,747 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 [2022-07-12 18:50:40,764 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 [2022-07-12 18:50:40,768 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 [2022-07-12 18:50:40,811 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 [2022-07-12 18:50:40,884 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 [2022-07-12 18:50:40,908 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 [2022-07-12 18:50:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:50:40,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:40,938 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 [2022-07-12 18:50:40,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:40,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158379] [2022-07-12 18:50:40,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:40,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117887916] [2022-07-12 18:50:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:40,945 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:40,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:40,946 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) [2022-07-12 18:50:40,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-12 18:50:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 18:50:41,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:41,077 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 [2022-07-12 18:50:41,100 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:41,100 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 [2022-07-12 18:50:41,114 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 [2022-07-12 18:50:41,120 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 [2022-07-12 18:50:41,142 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 [2022-07-12 18:50:41,210 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 [2022-07-12 18:50:41,224 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 [2022-07-12 18:50:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:50:41,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:41,244 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 [2022-07-12 18:50:41,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1117887916] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:41,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:41,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-12 18:50:41,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997968328] [2022-07-12 18:50:41,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:41,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 18:50:41,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 18:50:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=130, Unknown=2, NotChecked=46, Total=210 [2022-07-12 18:50:41,252 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) [2022-07-12 18:50:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:41,727 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-07-12 18:50:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:50:41,727 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 [2022-07-12 18:50:41,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:41,731 INFO L225 Difference]: With dead ends: 117 [2022-07-12 18:50:41,731 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 18:50:41,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=312, Unknown=2, NotChecked=74, Total=462 [2022-07-12 18:50:41,732 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 61 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:41,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 346 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 351 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-07-12 18:50:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 18:50:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2022-07-12 18:50:41,734 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) [2022-07-12 18:50:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2022-07-12 18:50:41,735 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 31 [2022-07-12 18:50:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:41,735 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2022-07-12 18:50:41,735 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) [2022-07-12 18:50:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2022-07-12 18:50:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-12 18:50:41,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:41,736 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] [2022-07-12 18:50:41,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:41,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:42,139 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 [2022-07-12 18:50:42,140 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)] === [2022-07-12 18:50:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1088706739, now seen corresponding path program 1 times [2022-07-12 18:50:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:42,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280542660] [2022-07-12 18:50:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:42,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:42,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:42,141 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) [2022-07-12 18:50:42,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 18:50:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:42,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 18:50:42,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:42,230 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 [2022-07-12 18:50:42,280 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:42,281 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 [2022-07-12 18:50:42,294 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 [2022-07-12 18:50:44,337 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 [2022-07-12 18:50:46,455 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-12 18:50:46,455 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 [2022-07-12 18:50:46,459 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 [2022-07-12 18:50:46,492 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 [2022-07-12 18:50:46,527 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:50:46,527 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 [2022-07-12 18:50:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-12 18:50:46,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:46,597 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 [2022-07-12 18:50:46,626 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret48#1.base_41| (_ BitVec 32))) (or (forall ((v_ArrVal_483 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_#t~mem47#1.base|) |c_ULTIMATE.start_entry_point_#t~mem47#1.offset| |v_ULTIMATE.start_entry_point_#t~ret48#1.base_41|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|))) (select (select (store |c_#memory_$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)))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_41| (_ bv0 32)))) is different from false [2022-07-12 18:50:46,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280542660] [2022-07-12 18:50:46,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280542660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [367267486] [2022-07-12 18:50:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:46,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:46,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:46,630 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) [2022-07-12 18:50:46,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-12 18:50:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:46,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:50:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:46,771 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 [2022-07-12 18:50:46,820 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:46,820 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 [2022-07-12 18:50:46,852 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 [2022-07-12 18:50:47,069 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:50:47,069 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 [2022-07-12 18:50:47,092 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 [2022-07-12 18:50:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:50:47,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:49,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [367267486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:49,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:50:49,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-07-12 18:50:49,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688494328] [2022-07-12 18:50:49,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:49,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 18:50:49,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 18:50:49,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=520, Unknown=23, NotChecked=144, Total=756 [2022-07-12 18:50:49,272 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) [2022-07-12 18:50:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:50,101 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2022-07-12 18:50:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:50:50,103 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 [2022-07-12 18:50:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:50,104 INFO L225 Difference]: With dead ends: 114 [2022-07-12 18:50:50,104 INFO L226 Difference]: Without dead ends: 114 [2022-07-12 18:50:50,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=180, Invalid=1205, Unknown=33, NotChecked=222, Total=1640 [2022-07-12 18:50:50,105 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:50,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 554 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 434 Invalid, 0 Unknown, 194 Unchecked, 0.4s Time] [2022-07-12 18:50:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-12 18:50:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2022-07-12 18:50:50,107 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) [2022-07-12 18:50:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-07-12 18:50:50,108 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 32 [2022-07-12 18:50:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:50,108 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-07-12 18:50:50,108 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) [2022-07-12 18:50:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-07-12 18:50:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-12 18:50:50,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:50,109 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] [2022-07-12 18:50:50,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:50,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:50,518 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 [2022-07-12 18:50:50,518 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)] === [2022-07-12 18:50:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:50,519 INFO L85 PathProgramCache]: Analyzing trace with hash 738912307, now seen corresponding path program 1 times [2022-07-12 18:50:50,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:50,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994674437] [2022-07-12 18:50:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:50,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:50,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:50,520 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) [2022-07-12 18:50:50,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 18:50:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:50:50,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:50,626 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 [2022-07-12 18:50:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 18:50:50,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:50:50,638 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:50,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994674437] [2022-07-12 18:50:50,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994674437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:50:50,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:50:50,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:50:50,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422074240] [2022-07-12 18:50:50,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:50:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:50:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:50:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:50:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:50:50,639 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) [2022-07-12 18:50:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:50,823 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-07-12 18:50:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:50:50,823 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 [2022-07-12 18:50:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:50,824 INFO L225 Difference]: With dead ends: 106 [2022-07-12 18:50:50,824 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 18:50:50,824 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 [2022-07-12 18:50:50,825 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 6 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-12 18:50:50,825 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] [2022-07-12 18:50:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 18:50:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-07-12 18:50:50,827 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) [2022-07-12 18:50:50,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2022-07-12 18:50:50,828 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 33 [2022-07-12 18:50:50,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:50,828 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2022-07-12 18:50:50,828 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) [2022-07-12 18:50:50,829 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2022-07-12 18:50:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 18:50:50,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:50,829 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] [2022-07-12 18:50:50,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:50:51,035 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)] === [2022-07-12 18:50:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1143014625, now seen corresponding path program 1 times [2022-07-12 18:50:51,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:50:51,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339839791] [2022-07-12 18:50:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:51,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:50:51,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:50:51,037 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) [2022-07-12 18:50:51,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 18:50:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:51,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 18:50:51,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:51,154 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 [2022-07-12 18:50:51,209 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:50:51,210 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 [2022-07-12 18:50:51,226 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 [2022-07-12 18:50:53,270 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 [2022-07-12 18:50:53,280 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 [2022-07-12 18:50:57,389 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-12 18:50:57,390 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 [2022-07-12 18:50:57,394 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 [2022-07-12 18:50:57,481 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 [2022-07-12 18:50:57,534 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:50:57,534 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 [2022-07-12 18:50:59,642 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 18:50:59,642 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 [2022-07-12 18:50:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-12 18:50:59,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:59,933 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_549 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (bvneg (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$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_549) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-07-12 18:50:59,948 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 [2022-07-12 18:50:59,957 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 [2022-07-12 18:50:59,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:50:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339839791] [2022-07-12 18:50:59,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339839791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1044781726] [2022-07-12 18:50:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:59,959 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:50:59,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:50:59,960 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) [2022-07-12 18:50:59,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-07-12 18:51:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:00,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-12 18:51:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:00,159 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 [2022-07-12 18:51:02,272 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:02,272 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 [2022-07-12 18:51:02,315 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 [2022-07-12 18:51:02,319 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 [2022-07-12 18:51:04,415 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 [2022-07-12 18:51:04,420 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 [2022-07-12 18:51:12,594 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-12 18:51:12,595 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 [2022-07-12 18:51:12,599 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 [2022-07-12 18:51:12,726 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 [2022-07-12 18:51:12,808 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 18:51:12,808 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 [2022-07-12 18:51:14,907 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 18:51:14,907 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 [2022-07-12 18:51:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-12 18:51:14,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:51:15,151 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$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_579) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) (_ bv1 1)))) is different from false [2022-07-12 18:51:15,169 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 [2022-07-12 18:51:15,179 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret48#1.base_50| (_ BitVec 32)) (v_ArrVal_579 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_entry_point_#t~ret48#1.base_50| (select (let ((.cse0 (store |c_#memory_$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_579) |c_ULTIMATE.start_entry_point_~a10~0#1.base|) |c_ULTIMATE.start_entry_point_~a10~0#1.offset|)))) is different from false [2022-07-12 18:51:15,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1044781726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:51:15,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:51:15,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2022-07-12 18:51:15,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999981642] [2022-07-12 18:51:15,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:51:15,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 18:51:15,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:15,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 18:51:15,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=958, Unknown=13, NotChecked=402, Total=1482 [2022-07-12 18:51:15,183 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) [2022-07-12 18:51:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:34,124 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2022-07-12 18:51:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:51:34,124 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 [2022-07-12 18:51:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:34,125 INFO L225 Difference]: With dead ends: 119 [2022-07-12 18:51:34,125 INFO L226 Difference]: Without dead ends: 119 [2022-07-12 18:51:34,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=209, Invalid=1604, Unknown=17, NotChecked=522, Total=2352 [2022-07-12 18:51:34,126 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 60 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:34,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 730 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 647 Invalid, 0 Unknown, 433 Unchecked, 0.6s Time] [2022-07-12 18:51:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-12 18:51:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2022-07-12 18:51:34,129 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) [2022-07-12 18:51:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-07-12 18:51:34,130 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 37 [2022-07-12 18:51:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:34,130 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-07-12 18:51:34,130 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) [2022-07-12 18:51:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-07-12 18:51:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 18:51:34,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:34,131 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] [2022-07-12 18:51:34,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-07-12 18:51:34,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:34,538 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 [2022-07-12 18:51:34,538 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)] === [2022-07-12 18:51:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:34,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1143014624, now seen corresponding path program 1 times [2022-07-12 18:51:34,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:51:34,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223181744] [2022-07-12 18:51:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:34,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:51:34,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:51:34,540 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) [2022-07-12 18:51:34,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-12 18:51:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:34,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 18:51:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:34,663 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 [2022-07-12 18:51:34,711 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:34,712 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 [2022-07-12 18:51:34,727 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 [2022-07-12 18:51:34,731 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 [2022-07-12 18:51:36,789 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 [2022-07-12 18:51:38,824 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 [2022-07-12 18:51:38,828 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 [2022-07-12 18:51:40,957 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-12 18:51:40,957 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 [2022-07-12 18:51:40,961 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 [2022-07-12 18:51:41,139 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 18:51:41,140 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 [2022-07-12 18:51:41,145 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 [2022-07-12 18:51:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:41,312 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 [2022-07-12 18:51:41,325 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:41,326 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 [2022-07-12 18:51:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-12 18:51:41,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:51:49,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:51:49,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223181744] [2022-07-12 18:51:49,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223181744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:51:49,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [950925675] [2022-07-12 18:51:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:49,706 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:51:49,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:51:49,732 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) [2022-07-12 18:51:49,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-12 18:51:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-12 18:51:49,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:49,955 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 [2022-07-12 18:51:50,131 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:50,131 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 [2022-07-12 18:51:50,188 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 [2022-07-12 18:51:50,195 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 [2022-07-12 18:51:52,474 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 [2022-07-12 18:51:52,483 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 [2022-07-12 18:51:52,719 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-12 18:51:52,720 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 [2022-07-12 18:51:52,723 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 [2022-07-12 18:51:53,053 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-12 18:51:53,054 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 [2022-07-12 18:51:53,058 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 [2022-07-12 18:51:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:51:53,163 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 [2022-07-12 18:51:53,170 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:51:53,170 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 [2022-07-12 18:51:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:51:53,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:51:57,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [950925675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:51:57,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:51:57,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 34 [2022-07-12 18:51:57,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945765553] [2022-07-12 18:51:57,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:51:57,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:51:57,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:51:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:51:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1146, Unknown=5, NotChecked=68, Total=1332 [2022-07-12 18:51:57,741 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) [2022-07-12 18:52:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:04,687 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-07-12 18:52:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 18:52:04,688 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 [2022-07-12 18:52:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:04,688 INFO L225 Difference]: With dead ends: 113 [2022-07-12 18:52:04,689 INFO L226 Difference]: Without dead ends: 113 [2022-07-12 18:52:04,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=221, Invalid=1938, Unknown=7, NotChecked=90, Total=2256 [2022-07-12 18:52:04,690 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 65 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:04,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 782 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 551 Invalid, 0 Unknown, 291 Unchecked, 0.5s Time] [2022-07-12 18:52:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-12 18:52:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-07-12 18:52:04,693 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) [2022-07-12 18:52:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2022-07-12 18:52:04,694 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 37 [2022-07-12 18:52:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:04,694 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2022-07-12 18:52:04,695 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) [2022-07-12 18:52:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2022-07-12 18:52:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 18:52:04,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:04,697 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] [2022-07-12 18:52:04,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:04,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-12 18:52:05,100 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 [2022-07-12 18:52:05,100 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)] === [2022-07-12 18:52:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1229276979, now seen corresponding path program 1 times [2022-07-12 18:52:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:05,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651681527] [2022-07-12 18:52:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:05,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:05,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:05,102 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) [2022-07-12 18:52:05,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-12 18:52:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:05,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:52:05,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:05,227 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 [2022-07-12 18:52:05,287 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 [2022-07-12 18:52:05,454 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-07-12 18:52:05,455 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 [2022-07-12 18:52:05,457 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 [2022-07-12 18:52:05,538 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-07-12 18:52:05,538 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 [2022-07-12 18:52:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:52:05,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:05,752 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:52:05,752 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 [2022-07-12 18:52:05,755 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 [2022-07-12 18:52:05,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651681527] [2022-07-12 18:52:05,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651681527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:05,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [925852335] [2022-07-12 18:52:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:05,887 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:52:05,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:52:05,888 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) [2022-07-12 18:52:05,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-12 18:52:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:06,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 18:52:06,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:06,050 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 [2022-07-12 18:52:06,137 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:06,138 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 [2022-07-12 18:52:06,170 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 [2022-07-12 18:52:06,256 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 [2022-07-12 18:52:10,357 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-12 18:52:10,357 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 [2022-07-12 18:52:10,429 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 [2022-07-12 18:52:10,468 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 [2022-07-12 18:52:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:52:10,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:10,525 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 [2022-07-12 18:52:10,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [925852335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:10,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:10,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2022-07-12 18:52:10,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024158614] [2022-07-12 18:52:10,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:10,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:52:10,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:52:10,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=805, Unknown=2, NotChecked=58, Total=992 [2022-07-12 18:52:10,539 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) [2022-07-12 18:52:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:17,486 INFO L93 Difference]: Finished difference Result 180 states and 203 transitions. [2022-07-12 18:52:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 18:52:17,487 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 [2022-07-12 18:52:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:17,488 INFO L225 Difference]: With dead ends: 180 [2022-07-12 18:52:17,488 INFO L226 Difference]: Without dead ends: 180 [2022-07-12 18:52:17,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=297, Invalid=1773, Unknown=4, NotChecked=88, Total=2162 [2022-07-12 18:52:17,489 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 184 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:17,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 715 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 780 Invalid, 0 Unknown, 159 Unchecked, 0.6s Time] [2022-07-12 18:52:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-12 18:52:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 122. [2022-07-12 18:52:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 85 states have (on average 1.4588235294117646) internal successors, (124), 108 states have internal predecessors, (124), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-12 18:52:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 137 transitions. [2022-07-12 18:52:17,493 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 137 transitions. Word has length 36 [2022-07-12 18:52:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:17,493 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 137 transitions. [2022-07-12 18:52:17,494 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) [2022-07-12 18:52:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 137 transitions. [2022-07-12 18:52:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 18:52:17,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:17,494 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] [2022-07-12 18:52:17,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-12 18:52:17,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-07-12 18:52:17,911 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 [2022-07-12 18:52:17,911 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)] === [2022-07-12 18:52:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1653548802, now seen corresponding path program 1 times [2022-07-12 18:52:17,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:52:17,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206931990] [2022-07-12 18:52:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:17,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:52:17,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:52:17,913 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) [2022-07-12 18:52:17,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-12 18:52:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:52:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:18,034 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 [2022-07-12 18:52:18,072 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:52:18,073 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 [2022-07-12 18:52:18,085 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 [2022-07-12 18:52:20,127 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 [2022-07-12 18:52:22,242 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-12 18:52:22,242 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 [2022-07-12 18:52:22,246 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 [2022-07-12 18:52:22,337 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-12 18:52:22,337 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 [2022-07-12 18:52:22,340 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 [2022-07-12 18:52:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-12 18:52:22,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:38,652 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:52:38,724 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 [2022-07-12 18:52:38,829 INFO L356 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2022-07-12 18:52:38,830 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 [2022-07-12 18:52:59,509 WARN L233 SmtUtils]: Spent 18.28s on a formula simplification. DAG size of input: 39 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:52:59,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:52:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 18:52:59,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:52:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206931990] [2022-07-12 18:52:59,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206931990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:59,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 18:52:59,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2022-07-12 18:52:59,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043605739] [2022-07-12 18:52:59,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 18:52:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 18:52:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 18:52:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=4, NotChecked=40, Total=506 [2022-07-12 18:52:59,830 INFO L87 Difference]: Start difference. First operand 122 states and 137 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) [2022-07-12 18:53:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:53:01,542 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2022-07-12 18:53:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 18:53:01,542 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 [2022-07-12 18:53:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:53:01,542 INFO L225 Difference]: With dead ends: 109 [2022-07-12 18:53:01,543 INFO L226 Difference]: Without dead ends: 109 [2022-07-12 18:53:01,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=4, NotChecked=54, Total=870 [2022-07-12 18:53:01,543 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 39 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:53:01,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 682 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 397 Invalid, 0 Unknown, 267 Unchecked, 1.1s Time] [2022-07-12 18:53:01,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-12 18:53:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-07-12 18:53:01,547 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) [2022-07-12 18:53:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2022-07-12 18:53:01,547 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 37 [2022-07-12 18:53:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:53:01,548 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2022-07-12 18:53:01,548 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) [2022-07-12 18:53:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2022-07-12 18:53:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-12 18:53:01,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:53:01,549 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] [2022-07-12 18:53:01,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-07-12 18:53:01,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 18:53:01,759 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)] === [2022-07-12 18:53:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:53:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash 219174838, now seen corresponding path program 1 times [2022-07-12 18:53:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 18:53:01,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391025328] [2022-07-12 18:53:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:01,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 18:53:01,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 18:53:01,761 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) [2022-07-12 18:53:01,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-12 18:53:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:01,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-12 18:53:01,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:02,180 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 [2022-07-12 18:53:02,201 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 [2022-07-12 18:53:02,406 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 [2022-07-12 18:53:02,519 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-12 18:53:02,519 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 [2022-07-12 18:53:02,837 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-12 18:53:02,838 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 [2022-07-12 18:53:03,474 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 18:53:03,474 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 [2022-07-12 18:53:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 18:53:16,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:53:16,639 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 [2022-07-12 18:53:49,878 WARN L233 SmtUtils]: Spent 14.86s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 18:53:49,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 18:53:49,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391025328] [2022-07-12 18:53:49,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391025328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:53:49,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537597339] [2022-07-12 18:53:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:53:49,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 18:53:49,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 18:53:49,880 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) [2022-07-12 18:53:49,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-07-12 18:53:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:53:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:53:50,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:53:50,666 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