./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/memsafety-ext2/complex_data_creation_test02-2.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 cb1edb9fb334d503cba549895692ff1d9d77f795ecc0798895274120b4ed179d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:23:28,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:23:28,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:23:28,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:23:28,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:23:28,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:23:28,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:23:28,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:23:28,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:23:28,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:23:28,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:23:28,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:23:28,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:23:28,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:23:28,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:23:28,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:23:28,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:23:28,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:23:28,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:23:28,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:23:28,566 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:23:28,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:23:28,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:23:28,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:23:28,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:23:28,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:23:28,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:23:28,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:23:28,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:23:28,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:23:28,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:23:28,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:23:28,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:23:28,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:23:28,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:23:28,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:23:28,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:23:28,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:23:28,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:23:28,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:23:28,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:23:28,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:23:28,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:23:28,629 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:23:28,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:23:28,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:23:28,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:23:28,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:23:28,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:23:28,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:23:28,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:23:28,634 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:23:28,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:23:28,635 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:23:28,635 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:23:28,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:23:28,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:23:28,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:23:28,636 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:23:28,636 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:23:28,636 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:23:28,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:23:28,637 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:23:28,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:23:28,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:23:28,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:23:28,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:23:28,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:23:28,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:23:28,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:23:28,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:23:28,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:23:28,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:23:28,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb1edb9fb334d503cba549895692ff1d9d77f795ecc0798895274120b4ed179d [2022-07-14 06:23:28,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:23:28,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:23:28,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:23:28,919 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:23:28,919 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:23:28,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i [2022-07-14 06:23:28,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268d43cc3/b7084d4d1da34325b266cfcb215b8b71/FLAG458f0eee4 [2022-07-14 06:23:29,468 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:23:29,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i [2022-07-14 06:23:29,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268d43cc3/b7084d4d1da34325b266cfcb215b8b71/FLAG458f0eee4 [2022-07-14 06:23:29,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268d43cc3/b7084d4d1da34325b266cfcb215b8b71 [2022-07-14 06:23:29,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:23:29,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:23:29,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:23:29,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:23:29,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:23:29,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:23:29" (1/1) ... [2022-07-14 06:23:29,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3462d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:29, skipping insertion in model container [2022-07-14 06:23:29,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:23:29" (1/1) ... [2022-07-14 06:23:29,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:23:30,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:23:30,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:23:30,298 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) [2022-07-14 06:23:30,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39bae17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:30, skipping insertion in model container [2022-07-14 06:23:30,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:23:30,299 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 06:23:30,301 INFO L158 Benchmark]: Toolchain (without parser) took 333.25ms. Allocated memory is still 119.5MB. Free memory was 93.3MB in the beginning and 90.0MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:23:30,302 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 119.5MB. Free memory is still 74.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:23:30,304 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.20ms. Allocated memory is still 119.5MB. Free memory was 93.3MB in the beginning and 90.0MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:23:30,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 119.5MB. Free memory is still 74.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.20ms. Allocated memory is still 119.5MB. Free memory was 93.3MB in the beginning and 90.0MB in the end (delta: 3.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 556]: 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/memsafety-ext2/complex_data_creation_test02-2.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 cb1edb9fb334d503cba549895692ff1d9d77f795ecc0798895274120b4ed179d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:23:32,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:23:32,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:23:32,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:23:32,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:23:32,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:23:32,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:23:32,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:23:32,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:23:32,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:23:32,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:23:32,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:23:32,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:23:32,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:23:32,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:23:32,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:23:32,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:23:32,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:23:32,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:23:32,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:23:32,222 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:23:32,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:23:32,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:23:32,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:23:32,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:23:32,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:23:32,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:23:32,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:23:32,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:23:32,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:23:32,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:23:32,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:23:32,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:23:32,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:23:32,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:23:32,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:23:32,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:23:32,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:23:32,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:23:32,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:23:32,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:23:32,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:23:32,253 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:23:32,290 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:23:32,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:23:32,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:23:32,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:23:32,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:23:32,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:23:32,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:23:32,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:23:32,294 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:23:32,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:23:32,295 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:23:32,296 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:23:32,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:23:32,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:23:32,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:23:32,297 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:23:32,297 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:23:32,297 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:23:32,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:23:32,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:23:32,298 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:23:32,298 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:23:32,298 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:23:32,298 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:23:32,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:23:32,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:23:32,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:23:32,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:23:32,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:23:32,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:23:32,300 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:23:32,300 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:23:32,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:23:32,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb1edb9fb334d503cba549895692ff1d9d77f795ecc0798895274120b4ed179d [2022-07-14 06:23:32,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:23:32,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:23:32,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:23:32,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:23:32,656 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:23:32,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i [2022-07-14 06:23:32,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52793184/9ec0209a22f147c5bc15fb9051271734/FLAG1a1299df9 [2022-07-14 06:23:33,298 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:23:33,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext2/complex_data_creation_test02-2.i [2022-07-14 06:23:33,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52793184/9ec0209a22f147c5bc15fb9051271734/FLAG1a1299df9 [2022-07-14 06:23:33,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52793184/9ec0209a22f147c5bc15fb9051271734 [2022-07-14 06:23:33,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:23:33,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:23:33,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:23:33,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:23:33,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:23:33,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:23:33" (1/1) ... [2022-07-14 06:23:33,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a43711f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:33, skipping insertion in model container [2022-07-14 06:23:33,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:23:33" (1/1) ... [2022-07-14 06:23:33,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:23:33,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:23:34,118 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:23:34,137 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 06:23:34,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:23:34,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:23:34,190 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:23:34,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:23:34,287 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:23:34,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34 WrapperNode [2022-07-14 06:23:34,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:23:34,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:23:34,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:23:34,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:23:34,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,356 INFO L137 Inliner]: procedures = 129, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2022-07-14 06:23:34,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:23:34,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:23:34,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:23:34,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:23:34,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:23:34,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:23:34,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:23:34,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:23:34,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (1/1) ... [2022-07-14 06:23:34,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:23:34,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:23:34,457 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) [2022-07-14 06:23:34,470 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 [2022-07-14 06:23:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 06:23:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:23:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure create_data [2022-07-14 06:23:34,499 INFO L138 BoogieDeclarations]: Found implementation of procedure create_data [2022-07-14 06:23:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:23:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:23:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:23:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:23:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:23:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:23:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:23:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 06:23:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:23:34,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:23:34,591 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:23:34,593 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:23:35,341 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:23:35,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:23:35,350 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-14 06:23:35,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:23:35 BoogieIcfgContainer [2022-07-14 06:23:35,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:23:35,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:23:35,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:23:35,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:23:35,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:23:33" (1/3) ... [2022-07-14 06:23:35,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a773e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:23:35, skipping insertion in model container [2022-07-14 06:23:35,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:23:34" (2/3) ... [2022-07-14 06:23:35,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a773e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:23:35, skipping insertion in model container [2022-07-14 06:23:35,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:23:35" (3/3) ... [2022-07-14 06:23:35,362 INFO L111 eAbstractionObserver]: Analyzing ICFG complex_data_creation_test02-2.i [2022-07-14 06:23:35,376 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:23:35,376 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 92 error locations. [2022-07-14 06:23:35,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:23:35,451 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@1778b21a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2ea3cdf5 [2022-07-14 06:23:35,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 92 error locations. [2022-07-14 06:23:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 93 states have (on average 2.161290322580645) internal successors, (201), 185 states have internal predecessors, (201), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:23:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-14 06:23:35,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:35,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-14 06:23:35,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:35,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:35,470 INFO L85 PathProgramCache]: Analyzing trace with hash 5052905, now seen corresponding path program 1 times [2022-07-14 06:23:35,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:35,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391423768] [2022-07-14 06:23:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:35,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:35,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:35,487 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) [2022-07-14 06:23:35,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:23:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:35,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-14 06:23:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:35,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:35,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:35,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391423768] [2022-07-14 06:23:35,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391423768] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:35,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:35,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:23:35,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081713300] [2022-07-14 06:23:35,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:35,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-14 06:23:35,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-14 06:23:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:23:35,634 INFO L87 Difference]: Start difference. First operand has 189 states, 93 states have (on average 2.161290322580645) internal successors, (201), 185 states have internal predecessors, (201), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:35,677 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2022-07-14 06:23:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-14 06:23:35,680 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-14 06:23:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:35,692 INFO L225 Difference]: With dead ends: 189 [2022-07-14 06:23:35,693 INFO L226 Difference]: Without dead ends: 187 [2022-07-14 06:23:35,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-14 06:23:35,702 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:35,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:23:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-14 06:23:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-07-14 06:23:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 92 states have (on average 2.108695652173913) internal successors, (194), 183 states have internal predecessors, (194), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:23:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 198 transitions. [2022-07-14 06:23:35,760 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 198 transitions. Word has length 4 [2022-07-14 06:23:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:35,761 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 198 transitions. [2022-07-14 06:23:35,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 198 transitions. [2022-07-14 06:23:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-14 06:23:35,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:35,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-14 06:23:35,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-14 06:23:35,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:35,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:35,973 INFO L85 PathProgramCache]: Analyzing trace with hash 5050693, now seen corresponding path program 1 times [2022-07-14 06:23:35,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:35,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409889079] [2022-07-14 06:23:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:35,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:35,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:35,976 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) [2022-07-14 06:23:35,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:23:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:23:36,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:36,073 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 [2022-07-14 06:23:36,123 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:23:36,124 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 [2022-07-14 06:23:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:36,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:36,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:36,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409889079] [2022-07-14 06:23:36,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409889079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:36,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:36,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:23:36,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252759995] [2022-07-14 06:23:36,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:23:36,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:23:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:23:36,163 INFO L87 Difference]: Start difference. First operand 187 states and 198 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:36,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:36,717 INFO L93 Difference]: Finished difference Result 207 states and 219 transitions. [2022-07-14 06:23:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:23:36,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-14 06:23:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:36,719 INFO L225 Difference]: With dead ends: 207 [2022-07-14 06:23:36,719 INFO L226 Difference]: Without dead ends: 207 [2022-07-14 06:23:36,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:23:36,720 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 149 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:36,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 287 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:23:36,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-14 06:23:36,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2022-07-14 06:23:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 92 states have (on average 2.0434782608695654) internal successors, (188), 177 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:23:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 192 transitions. [2022-07-14 06:23:36,731 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 192 transitions. Word has length 4 [2022-07-14 06:23:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:36,732 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 192 transitions. [2022-07-14 06:23:36,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:36,732 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 192 transitions. [2022-07-14 06:23:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-14 06:23:36,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:36,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-14 06:23:36,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:36,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:36,943 INFO L85 PathProgramCache]: Analyzing trace with hash 5050694, now seen corresponding path program 1 times [2022-07-14 06:23:36,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:36,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732513003] [2022-07-14 06:23:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:36,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:36,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:36,951 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) [2022-07-14 06:23:36,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:23:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:23:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:37,044 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 [2022-07-14 06:23:37,050 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 [2022-07-14 06:23:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:23:37,105 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 [2022-07-14 06:23:37,122 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:23:37,122 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 11 treesize of output 11 [2022-07-14 06:23:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:37,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:37,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:37,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732513003] [2022-07-14 06:23:37,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732513003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:37,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:37,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:23:37,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730514548] [2022-07-14 06:23:37,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:37,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:23:37,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:23:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:23:37,151 INFO L87 Difference]: Start difference. First operand 181 states and 192 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:37,710 INFO L93 Difference]: Finished difference Result 197 states and 211 transitions. [2022-07-14 06:23:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:23:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-14 06:23:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:37,716 INFO L225 Difference]: With dead ends: 197 [2022-07-14 06:23:37,717 INFO L226 Difference]: Without dead ends: 197 [2022-07-14 06:23:37,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:23:37,718 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 28 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:37,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 344 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:23:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-14 06:23:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 186. [2022-07-14 06:23:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 182 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:23:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 199 transitions. [2022-07-14 06:23:37,740 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 199 transitions. Word has length 4 [2022-07-14 06:23:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:37,741 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 199 transitions. [2022-07-14 06:23:37,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 199 transitions. [2022-07-14 06:23:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 06:23:37,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:37,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 06:23:37,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-14 06:23:37,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:37,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash 156571597, now seen corresponding path program 1 times [2022-07-14 06:23:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:37,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826530652] [2022-07-14 06:23:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:37,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:37,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:37,946 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) [2022-07-14 06:23:37,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:23:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:23:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:38,002 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 [2022-07-14 06:23:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:38,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:38,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:38,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826530652] [2022-07-14 06:23:38,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826530652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:38,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:38,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:23:38,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710746974] [2022-07-14 06:23:38,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:38,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:23:38,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:38,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:23:38,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:38,011 INFO L87 Difference]: Start difference. First operand 186 states and 199 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:38,269 INFO L93 Difference]: Finished difference Result 209 states and 222 transitions. [2022-07-14 06:23:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:23:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-14 06:23:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:38,271 INFO L225 Difference]: With dead ends: 209 [2022-07-14 06:23:38,271 INFO L226 Difference]: Without dead ends: 209 [2022-07-14 06:23:38,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:38,272 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 64 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:38,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 232 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:23:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-14 06:23:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 184. [2022-07-14 06:23:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 180 states have internal predecessors, (192), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:23:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 196 transitions. [2022-07-14 06:23:38,281 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 196 transitions. Word has length 5 [2022-07-14 06:23:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:38,282 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 196 transitions. [2022-07-14 06:23:38,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 196 transitions. [2022-07-14 06:23:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-14 06:23:38,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:38,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-14 06:23:38,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:38,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:38,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash 156571598, now seen corresponding path program 1 times [2022-07-14 06:23:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:38,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867698134] [2022-07-14 06:23:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:38,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:38,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:38,495 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:23:38,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:23:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:38,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:23:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:38,576 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 [2022-07-14 06:23:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:38,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:38,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:38,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867698134] [2022-07-14 06:23:38,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867698134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:38,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:38,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:23:38,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135913452] [2022-07-14 06:23:38,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:38,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:23:38,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:23:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:38,594 INFO L87 Difference]: Start difference. First operand 184 states and 196 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:38,862 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2022-07-14 06:23:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:23:38,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-07-14 06:23:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:38,863 INFO L225 Difference]: With dead ends: 182 [2022-07-14 06:23:38,863 INFO L226 Difference]: Without dead ends: 182 [2022-07-14 06:23:38,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:38,864 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 11 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:38,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 273 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:23:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-14 06:23:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-07-14 06:23:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 97 states have (on average 1.9484536082474226) internal successors, (189), 178 states have internal predecessors, (189), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:23:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 193 transitions. [2022-07-14 06:23:38,872 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 193 transitions. Word has length 5 [2022-07-14 06:23:38,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:38,872 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 193 transitions. [2022-07-14 06:23:38,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 193 transitions. [2022-07-14 06:23:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:23:38,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:38,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:38,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:39,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:39,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:39,083 INFO L85 PathProgramCache]: Analyzing trace with hash 666573431, now seen corresponding path program 1 times [2022-07-14 06:23:39,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:39,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722557462] [2022-07-14 06:23:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:39,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:39,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:39,084 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) [2022-07-14 06:23:39,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:23:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:23:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:39,158 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 [2022-07-14 06:23:39,185 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:23:39,186 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 11 treesize of output 11 [2022-07-14 06:23:39,251 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 [2022-07-14 06:23:39,258 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 [2022-07-14 06:23:39,284 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 [2022-07-14 06:23:39,287 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 [2022-07-14 06:23:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:39,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:39,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:39,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722557462] [2022-07-14 06:23:39,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722557462] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:39,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:39,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:23:39,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172637673] [2022-07-14 06:23:39,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:39,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:23:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:23:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:23:39,305 INFO L87 Difference]: Start difference. First operand 182 states and 193 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:39,695 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2022-07-14 06:23:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:23:39,696 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:23:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:39,697 INFO L225 Difference]: With dead ends: 184 [2022-07-14 06:23:39,697 INFO L226 Difference]: Without dead ends: 184 [2022-07-14 06:23:39,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:23:39,698 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 5 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:39,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 606 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:23:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-14 06:23:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-07-14 06:23:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 98 states have (on average 1.9387755102040816) internal successors, (190), 179 states have internal predecessors, (190), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:23:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 194 transitions. [2022-07-14 06:23:39,704 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 194 transitions. Word has length 10 [2022-07-14 06:23:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:39,704 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 194 transitions. [2022-07-14 06:23:39,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 194 transitions. [2022-07-14 06:23:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:23:39,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:39,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:39,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:39,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:39,923 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:39,923 INFO L85 PathProgramCache]: Analyzing trace with hash 623653565, now seen corresponding path program 1 times [2022-07-14 06:23:39,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:39,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859432891] [2022-07-14 06:23:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:39,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:39,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:39,925 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) [2022-07-14 06:23:39,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:23:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:39,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:23:39,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:40,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:40,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859432891] [2022-07-14 06:23:40,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859432891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:40,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:40,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:23:40,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541063844] [2022-07-14 06:23:40,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:23:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:23:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:23:40,016 INFO L87 Difference]: Start difference. First operand 183 states and 194 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:40,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:40,045 INFO L93 Difference]: Finished difference Result 260 states and 275 transitions. [2022-07-14 06:23:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:23:40,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 06:23:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:40,047 INFO L225 Difference]: With dead ends: 260 [2022-07-14 06:23:40,047 INFO L226 Difference]: Without dead ends: 260 [2022-07-14 06:23:40,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:23:40,048 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 80 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:40,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 548 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:23:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-14 06:23:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 224. [2022-07-14 06:23:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 138 states have (on average 1.963768115942029) internal successors, (271), 219 states have internal predecessors, (271), 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) [2022-07-14 06:23:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 275 transitions. [2022-07-14 06:23:40,055 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 275 transitions. Word has length 12 [2022-07-14 06:23:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:40,056 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 275 transitions. [2022-07-14 06:23:40,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:40,056 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 275 transitions. [2022-07-14 06:23:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:23:40,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:40,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:40,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:40,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:40,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting create_dataErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:40,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2141569776, now seen corresponding path program 1 times [2022-07-14 06:23:40,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:40,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385441087] [2022-07-14 06:23:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:40,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:40,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:40,269 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) [2022-07-14 06:23:40,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:23:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:40,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:23:40,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:40,367 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:23:40,368 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 1 case distinctions, treesize of input 9 treesize of output 14 [2022-07-14 06:23:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:40,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:40,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:40,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385441087] [2022-07-14 06:23:40,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385441087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:40,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:40,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:23:40,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310178183] [2022-07-14 06:23:40,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:40,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:23:40,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:23:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:40,382 INFO L87 Difference]: Start difference. First operand 224 states and 275 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:40,645 INFO L93 Difference]: Finished difference Result 227 states and 271 transitions. [2022-07-14 06:23:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:23:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:23:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:40,647 INFO L225 Difference]: With dead ends: 227 [2022-07-14 06:23:40,647 INFO L226 Difference]: Without dead ends: 227 [2022-07-14 06:23:40,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:40,648 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 62 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:40,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 202 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:23:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-14 06:23:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2022-07-14 06:23:40,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 144 states have (on average 1.8125) internal successors, (261), 213 states have internal predecessors, (261), 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) [2022-07-14 06:23:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 265 transitions. [2022-07-14 06:23:40,655 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 265 transitions. Word has length 13 [2022-07-14 06:23:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:40,655 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 265 transitions. [2022-07-14 06:23:40,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 265 transitions. [2022-07-14 06:23:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:23:40,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:40,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:40,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:40,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:40,865 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting create_dataErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2141569775, now seen corresponding path program 1 times [2022-07-14 06:23:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:40,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63481435] [2022-07-14 06:23:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:40,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:40,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:40,871 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) [2022-07-14 06:23:40,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:23:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:23:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:40,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:23:40,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:23:40,963 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 11 treesize of output 9 [2022-07-14 06:23:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:40,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:40,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:40,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63481435] [2022-07-14 06:23:40,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63481435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:40,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:40,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:23:40,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732102176] [2022-07-14 06:23:40,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:40,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:23:40,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:23:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:40,977 INFO L87 Difference]: Start difference. First operand 218 states and 265 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:41,296 INFO L93 Difference]: Finished difference Result 239 states and 279 transitions. [2022-07-14 06:23:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:23:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:23:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:41,298 INFO L225 Difference]: With dead ends: 239 [2022-07-14 06:23:41,298 INFO L226 Difference]: Without dead ends: 239 [2022-07-14 06:23:41,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:41,299 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 49 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:41,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 212 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:23:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-14 06:23:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 219. [2022-07-14 06:23:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 154 states have (on average 1.655844155844156) internal successors, (255), 214 states have internal predecessors, (255), 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) [2022-07-14 06:23:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 259 transitions. [2022-07-14 06:23:41,306 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 259 transitions. Word has length 13 [2022-07-14 06:23:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:41,307 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 259 transitions. [2022-07-14 06:23:41,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 259 transitions. [2022-07-14 06:23:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:23:41,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:41,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:41,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:41,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:41,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting create_dataErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash 533828155, now seen corresponding path program 1 times [2022-07-14 06:23:41,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:41,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405324659] [2022-07-14 06:23:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:41,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:41,514 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:23:41,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:23:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:41,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:23:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:41,607 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:23:41,608 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 1 case distinctions, treesize of input 9 treesize of output 18 [2022-07-14 06:23:41,651 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 13 treesize of output 9 [2022-07-14 06:23:41,680 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 12 [2022-07-14 06:23:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:41,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:41,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405324659] [2022-07-14 06:23:41,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405324659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:41,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:41,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:23:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107087585] [2022-07-14 06:23:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:41,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:23:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:23:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:23:41,690 INFO L87 Difference]: Start difference. First operand 219 states and 259 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:42,172 INFO L93 Difference]: Finished difference Result 270 states and 323 transitions. [2022-07-14 06:23:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:23:42,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-14 06:23:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:42,174 INFO L225 Difference]: With dead ends: 270 [2022-07-14 06:23:42,174 INFO L226 Difference]: Without dead ends: 270 [2022-07-14 06:23:42,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:23:42,175 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 25 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:42,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 413 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:23:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-14 06:23:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 225. [2022-07-14 06:23:42,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 160 states have (on average 1.65625) internal successors, (265), 220 states have internal predecessors, (265), 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) [2022-07-14 06:23:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 269 transitions. [2022-07-14 06:23:42,181 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 269 transitions. Word has length 17 [2022-07-14 06:23:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:42,181 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 269 transitions. [2022-07-14 06:23:42,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 269 transitions. [2022-07-14 06:23:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 06:23:42,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:42,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:42,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:42,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:42,395 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting create_dataErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:42,396 INFO L85 PathProgramCache]: Analyzing trace with hash 533828156, now seen corresponding path program 1 times [2022-07-14 06:23:42,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:42,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706783338] [2022-07-14 06:23:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:42,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:42,398 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) [2022-07-14 06:23:42,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:23:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:23:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:42,521 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:23:42,522 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:23:42,544 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 13 treesize of output 9 [2022-07-14 06:23:42,554 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 13 treesize of output 9 [2022-07-14 06:23:42,618 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 9 [2022-07-14 06:23:42,623 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 19 treesize of output 7 [2022-07-14 06:23:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:42,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:42,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:42,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706783338] [2022-07-14 06:23:42,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706783338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:42,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:42,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:23:42,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098548754] [2022-07-14 06:23:42,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:23:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:23:42,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:23:42,643 INFO L87 Difference]: Start difference. First operand 225 states and 269 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:43,218 INFO L93 Difference]: Finished difference Result 227 states and 267 transitions. [2022-07-14 06:23:43,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:23:43,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-14 06:23:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:43,220 INFO L225 Difference]: With dead ends: 227 [2022-07-14 06:23:43,220 INFO L226 Difference]: Without dead ends: 227 [2022-07-14 06:23:43,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:23:43,221 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 5 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:43,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 424 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:23:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-14 06:23:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2022-07-14 06:23:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 160 states have (on average 1.63125) internal successors, (261), 220 states have internal predecessors, (261), 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) [2022-07-14 06:23:43,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2022-07-14 06:23:43,227 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 17 [2022-07-14 06:23:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:43,227 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2022-07-14 06:23:43,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2022-07-14 06:23:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:23:43,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:43,228 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] [2022-07-14 06:23:43,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:43,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:43,438 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting create_dataErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:43,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1553049946, now seen corresponding path program 1 times [2022-07-14 06:23:43,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:43,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008415595] [2022-07-14 06:23:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:43,440 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) [2022-07-14 06:23:43,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:23:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:43,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:23:43,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:43,605 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:23:43,606 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 20 treesize of output 22 [2022-07-14 06:23:43,631 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 13 treesize of output 9 [2022-07-14 06:23:43,721 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:23:43,721 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 34 treesize of output 35 [2022-07-14 06:23:43,774 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 13 [2022-07-14 06:23:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:23:43,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:23:43,897 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_177 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select |c_#valid| (let ((.cse0 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse0) v_ArrVal_177) c_create_data_~data~0.base) .cse0))) (_ bv1 1))) is different from false [2022-07-14 06:23:43,924 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:23:43,924 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-14 06:23:43,927 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 40 treesize of output 28 [2022-07-14 06:23:43,931 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 13 treesize of output 9 [2022-07-14 06:23:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-14 06:23:43,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008415595] [2022-07-14 06:23:43,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008415595] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:23:43,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:23:43,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-14 06:23:43,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670925384] [2022-07-14 06:23:43,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:23:43,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:23:43,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:23:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=64, Unknown=3, NotChecked=16, Total=110 [2022-07-14 06:23:43,975 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:44,546 INFO L93 Difference]: Finished difference Result 232 states and 269 transitions. [2022-07-14 06:23:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:23:44,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:23:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:44,548 INFO L225 Difference]: With dead ends: 232 [2022-07-14 06:23:44,548 INFO L226 Difference]: Without dead ends: 232 [2022-07-14 06:23:44,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=78, Unknown=3, NotChecked=18, Total=132 [2022-07-14 06:23:44,549 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 49 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:44,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 626 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 245 Invalid, 0 Unknown, 275 Unchecked, 0.5s Time] [2022-07-14 06:23:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-14 06:23:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2022-07-14 06:23:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 160 states have (on average 1.61875) internal successors, (259), 219 states have internal predecessors, (259), 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) [2022-07-14 06:23:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 263 transitions. [2022-07-14 06:23:44,555 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 263 transitions. Word has length 22 [2022-07-14 06:23:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:44,556 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 263 transitions. [2022-07-14 06:23:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 263 transitions. [2022-07-14 06:23:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:23:44,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:44,557 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] [2022-07-14 06:23:44,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-07-14 06:23:44,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:44,766 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting create_dataErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1553049945, now seen corresponding path program 1 times [2022-07-14 06:23:44,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:44,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009501742] [2022-07-14 06:23:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:44,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:44,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:44,769 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:23:44,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:23:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:44,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:23:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:44,913 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 11 treesize of output 9 [2022-07-14 06:23:44,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:23:44,941 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 13 treesize of output 9 [2022-07-14 06:23:44,951 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 13 treesize of output 9 [2022-07-14 06:23:45,067 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:23:45,067 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 46 treesize of output 45 [2022-07-14 06:23:45,074 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 22 treesize of output 24 [2022-07-14 06:23:45,158 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 13 [2022-07-14 06:23:45,167 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 19 treesize of output 7 [2022-07-14 06:23:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:45,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:23:45,625 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_223) c_create_data_~data~0.base) .cse0) (_ bv8 32) (bvmul c_create_data_~counter~0 (_ bv4 32))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_222) c_create_data_~data~0.base) .cse0))))) (forall ((v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_223) c_create_data_~data~0.base) (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd .cse1 (_ bv4 32) .cse2) (bvadd .cse1 (_ bv8 32) .cse2))))) is different from false [2022-07-14 06:23:45,670 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_223) c_create_data_~data~0.base) .cse1) (bvmul c_create_data_~counter~0 (_ bv4 32))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_222) c_create_data_~data~0.base) .cse1)))))) (forall ((v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (let ((.cse4 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse4) v_ArrVal_223) c_create_data_~data~0.base) .cse4))) (.cse3 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd (_ bv4 32) .cse2 .cse3) (bvadd (_ bv8 32) .cse2 .cse3))))) is different from false [2022-07-14 06:23:45,720 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_222 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_223) c_create_data_~data~0.base) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_222) c_create_data_~data~0.base) .cse1)))))) (forall ((v_ArrVal_223 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (let ((.cse3 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse3) v_ArrVal_223) c_create_data_~data~0.base) .cse3)))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd (_ bv8 32) .cse2))))) is different from false [2022-07-14 06:23:45,736 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:23:45,736 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-07-14 06:23:45,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:23:45,746 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-07-14 06:23:45,751 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 62 treesize of output 50 [2022-07-14 06:23:45,755 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 96 treesize of output 78 [2022-07-14 06:23:45,764 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 40 treesize of output 32 [2022-07-14 06:23:45,766 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 66 treesize of output 58 [2022-07-14 06:23:45,873 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:23:45,874 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2022-07-14 06:23:45,877 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 54 treesize of output 36 [2022-07-14 06:23:45,883 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 19 treesize of output 11 [2022-07-14 06:23:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-14 06:23:46,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:46,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009501742] [2022-07-14 06:23:46,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009501742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:23:46,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:23:46,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-14 06:23:46,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683013681] [2022-07-14 06:23:46,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:23:46,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 06:23:46,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:46,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 06:23:46,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=102, Unknown=3, NotChecked=66, Total=210 [2022-07-14 06:23:46,458 INFO L87 Difference]: Start difference. First operand 224 states and 263 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:48,658 INFO L93 Difference]: Finished difference Result 236 states and 275 transitions. [2022-07-14 06:23:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:23:48,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:23:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:48,660 INFO L225 Difference]: With dead ends: 236 [2022-07-14 06:23:48,660 INFO L226 Difference]: Without dead ends: 236 [2022-07-14 06:23:48,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=159, Unknown=3, NotChecked=84, Total=306 [2022-07-14 06:23:48,661 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 12 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:48,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1004 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 506 Invalid, 0 Unknown, 354 Unchecked, 2.0s Time] [2022-07-14 06:23:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-14 06:23:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2022-07-14 06:23:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.5823529411764705) internal successors, (269), 229 states have internal predecessors, (269), 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) [2022-07-14 06:23:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 273 transitions. [2022-07-14 06:23:48,667 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 273 transitions. Word has length 22 [2022-07-14 06:23:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:48,668 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 273 transitions. [2022-07-14 06:23:48,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 15 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 273 transitions. [2022-07-14 06:23:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 06:23:48,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:48,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:48,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:48,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:48,875 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting create_dataErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:48,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:48,876 INFO L85 PathProgramCache]: Analyzing trace with hash 767728924, now seen corresponding path program 2 times [2022-07-14 06:23:48,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:48,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737932849] [2022-07-14 06:23:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:23:48,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:48,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:48,878 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) [2022-07-14 06:23:48,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:23:49,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:23:49,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:23:49,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 06:23:49,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:49,070 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:23:49,070 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:23:49,080 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 11 treesize of output 9 [2022-07-14 06:23:49,099 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 13 treesize of output 9 [2022-07-14 06:23:49,109 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 13 treesize of output 9 [2022-07-14 06:23:49,215 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:23:49,215 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 46 treesize of output 45 [2022-07-14 06:23:49,221 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 22 treesize of output 24 [2022-07-14 06:23:49,373 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:23:49,374 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 46 treesize of output 45 [2022-07-14 06:23:49,379 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 22 treesize of output 24 [2022-07-14 06:23:49,463 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 13 [2022-07-14 06:23:49,470 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 19 treesize of output 7 [2022-07-14 06:23:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:49,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:23:49,871 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_285) c_create_data_~data~0.base) (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (.cse1 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd .cse0 (_ bv4 32) .cse1) (bvadd .cse0 (_ bv8 32) .cse1)))) (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_285) c_create_data_~data~0.base) .cse2) (_ bv8 32) (bvmul c_create_data_~counter~0 (_ bv4 32))) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_286) c_create_data_~data~0.base) .cse2)))))) is different from false [2022-07-14 06:23:49,917 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse1))) (bvule (bvadd (_ bv8 32) (bvmul c_create_data_~counter~0 (_ bv4 32)) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_285) c_create_data_~data~0.base) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_286) c_create_data_~data~0.base) .cse1)))))) (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse3 (let ((.cse4 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse4) v_ArrVal_285) c_create_data_~data~0.base) .cse4)))) (bvule (bvadd (_ bv4 32) .cse2 .cse3) (bvadd (_ bv8 32) .cse2 .cse3))))) is different from false [2022-07-14 06:23:50,001 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvmul c_create_data_~counter~0 (_ bv4 32))) (.cse1 (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2) v_ArrVal_285) c_create_data_~data~0.base) .cse2)))) (bvule (bvadd (_ bv8 32) .cse0 .cse1) (bvadd .cse0 (_ bv12 32) .cse1)))) (forall ((v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse4))) (bvule (bvadd (bvmul c_create_data_~counter~0 (_ bv4 32)) (_ bv12 32) (select (select (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_285) c_create_data_~data~0.base) .cse4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_286) c_create_data_~data~0.base) .cse4))))))) is different from false [2022-07-14 06:23:50,071 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_284)) (.cse1 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select .cse2 c_create_data_~data~0.base) .cse1))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_283) .cse0 v_ArrVal_285) c_create_data_~data~0.base) .cse1) (bvmul c_create_data_~counter~0 (_ bv4 32)) (_ bv12 32)) (select |c_#length| (select (select (store .cse2 .cse0 v_ArrVal_286) c_create_data_~data~0.base) .cse1)))))) (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (let ((.cse5 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_data_#t~mem9.base| v_ArrVal_283) (select (select (store |c_#memory_$Pointer$.base| |c_create_data_#t~mem9.base| v_ArrVal_284) c_create_data_~data~0.base) .cse5) v_ArrVal_285) c_create_data_~data~0.base) .cse5))) (.cse4 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd (_ bv8 32) .cse3 .cse4) (bvadd .cse3 .cse4 (_ bv12 32)))))) is different from false [2022-07-14 06:23:50,119 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_284))) (let ((.cse1 (select (select .cse3 c_create_data_~data~0.base) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_283) .cse1 v_ArrVal_285) c_create_data_~data~0.base) .cse2) (bvmul c_create_data_~counter~0 (_ bv4 32)) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_286) c_create_data_~data~0.base) .cse2)))))))) (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (let ((.cse7 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (let ((.cse6 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse7))) (store (store |c_#memory_$Pointer$.offset| .cse6 v_ArrVal_283) (select (select (store |c_#memory_$Pointer$.base| .cse6 v_ArrVal_284) c_create_data_~data~0.base) .cse7) v_ArrVal_285)) c_create_data_~data~0.base) .cse7))) (.cse5 (bvmul c_create_data_~counter~0 (_ bv4 32)))) (bvule (bvadd .cse4 (_ bv8 32) .cse5) (bvadd .cse4 .cse5 (_ bv12 32)))))) is different from false [2022-07-14 06:23:50,179 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (let ((.cse2 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse2))) (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_283) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_284) c_create_data_~data~0.base) .cse2) v_ArrVal_285)) c_create_data_~data~0.base) .cse2)))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_284 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_285 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_286 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_283 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (bvadd (_ bv4 32) c_create_data_~data~0.offset))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_create_data_~data~0.base) .cse5))) (let ((.cse6 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_284))) (let ((.cse4 (select (select .cse6 c_create_data_~data~0.base) .cse5))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_283) .cse4 v_ArrVal_285) c_create_data_~data~0.base) .cse5) (_ bv12 32)) (select |c_#length| (select (select (store .cse6 .cse4 v_ArrVal_286) c_create_data_~data~0.base) .cse5))))))))) is different from false [2022-07-14 06:23:50,199 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:23:50,199 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2022-07-14 06:23:50,209 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:23:50,209 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-07-14 06:23:50,215 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 102 treesize of output 84 [2022-07-14 06:23:50,219 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 174 treesize of output 144 [2022-07-14 06:23:50,232 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 102 treesize of output 86 [2022-07-14 06:23:50,236 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 124 treesize of output 100 [2022-07-14 06:23:50,248 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 70 treesize of output 62 [2022-07-14 06:23:50,285 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:23:50,285 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2022-07-14 06:23:50,299 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:23:50,300 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2022-07-14 06:23:50,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:23:50,311 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 92 treesize of output 56 [2022-07-14 06:23:50,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:23:50,319 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 50 treesize of output 32 [2022-07-14 06:23:50,326 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 15 treesize of output 11 [2022-07-14 06:23:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2022-07-14 06:23:50,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:50,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737932849] [2022-07-14 06:23:50,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737932849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:23:50,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:23:50,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2022-07-14 06:23:50,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869981903] [2022-07-14 06:23:50,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:23:50,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:23:50,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:23:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=144, Unknown=6, NotChecked=174, Total=380 [2022-07-14 06:23:50,423 INFO L87 Difference]: Start difference. First operand 234 states and 273 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:53,034 INFO L93 Difference]: Finished difference Result 246 states and 285 transitions. [2022-07-14 06:23:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:23:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 06:23:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:53,036 INFO L225 Difference]: With dead ends: 246 [2022-07-14 06:23:53,036 INFO L226 Difference]: Without dead ends: 246 [2022-07-14 06:23:53,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=239, Unknown=6, NotChecked=222, Total=552 [2022-07-14 06:23:53,037 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 18 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:53,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1254 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 632 Invalid, 0 Unknown, 550 Unchecked, 2.2s Time] [2022-07-14 06:23:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-14 06:23:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-07-14 06:23:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 180 states have (on average 1.55) internal successors, (279), 239 states have internal predecessors, (279), 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) [2022-07-14 06:23:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 283 transitions. [2022-07-14 06:23:53,044 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 283 transitions. Word has length 27 [2022-07-14 06:23:53,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:53,044 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 283 transitions. [2022-07-14 06:23:53,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:53,044 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 283 transitions. [2022-07-14 06:23:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:23:53,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:53,045 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:53,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:53,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:53,257 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting create_dataErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:53,258 INFO L85 PathProgramCache]: Analyzing trace with hash 852563911, now seen corresponding path program 3 times [2022-07-14 06:23:53,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:53,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859789289] [2022-07-14 06:23:53,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:23:53,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:53,260 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) [2022-07-14 06:23:53,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:23:53,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:23:53,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:23:53,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:23:53,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:53,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:23:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:23:53,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:53,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859789289] [2022-07-14 06:23:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859789289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:23:53,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:23:53,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-14 06:23:53,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664663477] [2022-07-14 06:23:53,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:23:53,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:23:53,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:53,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:23:53,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:23:53,690 INFO L87 Difference]: Start difference. First operand 244 states and 283 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:53,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:53,822 INFO L93 Difference]: Finished difference Result 241 states and 277 transitions. [2022-07-14 06:23:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:23:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-14 06:23:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:53,824 INFO L225 Difference]: With dead ends: 241 [2022-07-14 06:23:53,824 INFO L226 Difference]: Without dead ends: 241 [2022-07-14 06:23:53,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:23:53,825 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 47 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:53,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 898 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:23:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-14 06:23:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2022-07-14 06:23:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 176 states have (on average 1.5397727272727273) internal successors, (271), 234 states have internal predecessors, (271), 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) [2022-07-14 06:23:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 275 transitions. [2022-07-14 06:23:53,830 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 275 transitions. Word has length 32 [2022-07-14 06:23:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:53,833 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 275 transitions. [2022-07-14 06:23:53,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 275 transitions. [2022-07-14 06:23:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:23:53,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:53,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2022-07-14 06:23:53,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:54,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:54,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting create_dataErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:54,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1939829061, now seen corresponding path program 1 times [2022-07-14 06:23:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:54,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232926187] [2022-07-14 06:23:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:54,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:54,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:54,054 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) [2022-07-14 06:23:54,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:23:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:23:54,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:54,211 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 [2022-07-14 06:23:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:23:54,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:54,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:54,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232926187] [2022-07-14 06:23:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232926187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:54,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:54,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:23:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307863756] [2022-07-14 06:23:54,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:23:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:54,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:23:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:54,218 INFO L87 Difference]: Start difference. First operand 239 states and 275 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:54,445 INFO L93 Difference]: Finished difference Result 241 states and 269 transitions. [2022-07-14 06:23:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:23:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-14 06:23:54,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:54,447 INFO L225 Difference]: With dead ends: 241 [2022-07-14 06:23:54,447 INFO L226 Difference]: Without dead ends: 241 [2022-07-14 06:23:54,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:54,448 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 22 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:54,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:23:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-07-14 06:23:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 235. [2022-07-14 06:23:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 176 states have (on average 1.4715909090909092) internal successors, (259), 230 states have internal predecessors, (259), 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) [2022-07-14 06:23:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 263 transitions. [2022-07-14 06:23:54,454 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 263 transitions. Word has length 41 [2022-07-14 06:23:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:54,454 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 263 transitions. [2022-07-14 06:23:54,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 263 transitions. [2022-07-14 06:23:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:23:54,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:54,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2022-07-14 06:23:54,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:54,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:54,667 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting create_dataErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:54,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1939829060, now seen corresponding path program 1 times [2022-07-14 06:23:54,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:54,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228778743] [2022-07-14 06:23:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:54,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:54,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:54,669 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:23:54,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 06:23:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:54,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:23:54,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:54,823 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 [2022-07-14 06:23:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:23:54,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:23:54,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:54,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228778743] [2022-07-14 06:23:54,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228778743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:23:54,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:23:54,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:23:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765256992] [2022-07-14 06:23:54,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:54,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:23:54,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:23:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:54,834 INFO L87 Difference]: Start difference. First operand 235 states and 263 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:55,055 INFO L93 Difference]: Finished difference Result 237 states and 257 transitions. [2022-07-14 06:23:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:23:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-14 06:23:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:55,057 INFO L225 Difference]: With dead ends: 237 [2022-07-14 06:23:55,057 INFO L226 Difference]: Without dead ends: 237 [2022-07-14 06:23:55,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:23:55,058 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 18 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:55,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 232 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:23:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-14 06:23:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 231. [2022-07-14 06:23:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 176 states have (on average 1.4034090909090908) internal successors, (247), 226 states have internal predecessors, (247), 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) [2022-07-14 06:23:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 251 transitions. [2022-07-14 06:23:55,064 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 251 transitions. Word has length 41 [2022-07-14 06:23:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:55,064 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 251 transitions. [2022-07-14 06:23:55,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:23:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 251 transitions. [2022-07-14 06:23:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:23:55,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:55,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:55,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:55,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:55,276 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:55,277 INFO L85 PathProgramCache]: Analyzing trace with hash -663465002, now seen corresponding path program 1 times [2022-07-14 06:23:55,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:55,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216316336] [2022-07-14 06:23:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:55,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:55,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:55,279 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) [2022-07-14 06:23:55,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:23:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:55,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:23:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:55,568 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 [2022-07-14 06:23:55,611 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 13 treesize of output 9 [2022-07-14 06:23:55,648 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 9 [2022-07-14 06:23:55,831 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-14 06:23:55,832 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 4 case distinctions, treesize of input 21 treesize of output 37 [2022-07-14 06:23:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:23:55,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:23:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:23:57,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:23:57,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216316336] [2022-07-14 06:23:57,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216316336] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-14 06:23:57,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:23:57,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-14 06:23:57,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693182311] [2022-07-14 06:23:57,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:23:57,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:23:57,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:23:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:23:57,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:23:57,526 INFO L87 Difference]: Start difference. First operand 231 states and 251 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-07-14 06:23:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:23:57,719 INFO L93 Difference]: Finished difference Result 272 states and 297 transitions. [2022-07-14 06:23:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:23:57,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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 44 [2022-07-14 06:23:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:23:57,721 INFO L225 Difference]: With dead ends: 272 [2022-07-14 06:23:57,721 INFO L226 Difference]: Without dead ends: 272 [2022-07-14 06:23:57,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:23:57,722 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 63 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:23:57,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 256 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-07-14 06:23:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-07-14 06:23:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 243. [2022-07-14 06:23:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 187 states have (on average 1.4064171122994653) internal successors, (263), 237 states have internal predecessors, (263), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:23:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 268 transitions. [2022-07-14 06:23:57,727 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 268 transitions. Word has length 44 [2022-07-14 06:23:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:23:57,728 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 268 transitions. [2022-07-14 06:23:57,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-07-14 06:23:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 268 transitions. [2022-07-14 06:23:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:23:57,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:23:57,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-14 06:23:57,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:23:57,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:23:57,944 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:23:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:23:57,945 INFO L85 PathProgramCache]: Analyzing trace with hash -663465001, now seen corresponding path program 1 times [2022-07-14 06:23:57,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:23:57,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474965716] [2022-07-14 06:23:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:23:57,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:23:57,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:23:57,947 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:23:57,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 06:23:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:23:58,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:23:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:23:58,353 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 [2022-07-14 06:23:58,359 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 [2022-07-14 06:23:58,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:23:58,506 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 9 [2022-07-14 06:23:58,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:23:58,732 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:23:58,733 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-14 06:23:58,757 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:23:58,757 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 [2022-07-14 06:23:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:23:58,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:00,961 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_create_data_~data~0.base_52 (_ BitVec 32)) (v_ArrVal_791 (_ BitVec 32)) (v_ArrVal_790 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_~node~0#1.offset|))) (and (bvule .cse0 (select (store (store |c_#length| v_create_data_~data~0.base_52 v_ArrVal_791) v_ArrVal_790 (_ bv80 32)) |c_ULTIMATE.start_append_~node~0#1.base|)) (bvule |c_ULTIMATE.start_append_~node~0#1.offset| .cse0))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_52)))))) is different from false [2022-07-14 06:24:00,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:00,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474965716] [2022-07-14 06:24:00,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474965716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:24:00,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1235015203] [2022-07-14 06:24:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:24:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:24:00,967 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:24:00,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-14 06:24:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:01,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:24:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:01,547 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 [2022-07-14 06:24:01,553 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 [2022-07-14 06:24:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:01,947 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:24:01,947 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-14 06:24:01,964 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:24:01,964 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 [2022-07-14 06:24:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:01,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:01,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1235015203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:01,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:24:01,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-07-14 06:24:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479873808] [2022-07-14 06:24:01,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:01,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:24:01,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:24:01,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2022-07-14 06:24:01,993 INFO L87 Difference]: Start difference. First operand 243 states and 268 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2022-07-14 06:24:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:02,834 INFO L93 Difference]: Finished difference Result 314 states and 347 transitions. [2022-07-14 06:24:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:24:02,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 44 [2022-07-14 06:24:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:02,836 INFO L225 Difference]: With dead ends: 314 [2022-07-14 06:24:02,836 INFO L226 Difference]: Without dead ends: 314 [2022-07-14 06:24:02,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=85, Unknown=1, NotChecked=18, Total=132 [2022-07-14 06:24:02,836 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 78 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:02,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 578 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 319 Invalid, 0 Unknown, 229 Unchecked, 0.8s Time] [2022-07-14 06:24:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-14 06:24:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 246. [2022-07-14 06:24:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 189 states have (on average 1.3968253968253967) internal successors, (264), 239 states have internal predecessors, (264), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:24:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 270 transitions. [2022-07-14 06:24:02,842 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 270 transitions. Word has length 44 [2022-07-14 06:24:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:02,843 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 270 transitions. [2022-07-14 06:24:02,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2022-07-14 06:24:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 270 transitions. [2022-07-14 06:24:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:24:02,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:02,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:02,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:03,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:03,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:24:03,245 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:03,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1359492877, now seen corresponding path program 1 times [2022-07-14 06:24:03,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:03,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839725091] [2022-07-14 06:24:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:03,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:03,248 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:24:03,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 06:24:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:24:03,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:03,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:24:03,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:24:03,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:24:03,729 INFO L356 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2022-07-14 06:24:03,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2022-07-14 06:24:03,831 INFO L356 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-07-14 06:24:03,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2022-07-14 06:24:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:03,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:03,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:03,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839725091] [2022-07-14 06:24:03,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839725091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:03,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:24:03,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:24:03,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796624341] [2022-07-14 06:24:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:24:03,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:24:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:24:03,874 INFO L87 Difference]: Start difference. First operand 246 states and 270 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) [2022-07-14 06:24:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:04,496 INFO L93 Difference]: Finished difference Result 288 states and 320 transitions. [2022-07-14 06:24:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:24:04,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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 46 [2022-07-14 06:24:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:04,499 INFO L225 Difference]: With dead ends: 288 [2022-07-14 06:24:04,499 INFO L226 Difference]: Without dead ends: 288 [2022-07-14 06:24:04,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:24:04,499 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 26 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:04,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 706 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:24:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-14 06:24:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 256. [2022-07-14 06:24:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 199 states have (on average 1.3819095477386936) internal successors, (275), 249 states have internal predecessors, (275), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:24:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 281 transitions. [2022-07-14 06:24:04,505 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 281 transitions. Word has length 46 [2022-07-14 06:24:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:04,505 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 281 transitions. [2022-07-14 06:24:04,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) [2022-07-14 06:24:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 281 transitions. [2022-07-14 06:24:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:24:04,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:04,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:04,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-07-14 06:24:04,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:04,723 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash 918765395, now seen corresponding path program 1 times [2022-07-14 06:24:04,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120845034] [2022-07-14 06:24:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:04,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:04,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:04,726 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) [2022-07-14 06:24:04,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 06:24:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:24:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:04,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:04,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:04,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120845034] [2022-07-14 06:24:04,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120845034] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:04,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:24:04,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:24:04,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237156737] [2022-07-14 06:24:04,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:04,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:24:04,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:04,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:24:04,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:24:04,901 INFO L87 Difference]: Start difference. First operand 256 states and 281 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-07-14 06:24:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:04,928 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2022-07-14 06:24:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:24:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 46 [2022-07-14 06:24:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:04,930 INFO L225 Difference]: With dead ends: 264 [2022-07-14 06:24:04,930 INFO L226 Difference]: Without dead ends: 264 [2022-07-14 06:24:04,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:24:04,931 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 3 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:04,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 455 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:24:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-14 06:24:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2022-07-14 06:24:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 205 states have (on average 1.3609756097560977) internal successors, (279), 255 states have internal predecessors, (279), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:24:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 285 transitions. [2022-07-14 06:24:04,937 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 285 transitions. Word has length 46 [2022-07-14 06:24:04,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:04,937 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 285 transitions. [2022-07-14 06:24:04,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-07-14 06:24:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 285 transitions. [2022-07-14 06:24:04,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:24:04,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:04,938 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:04,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:05,150 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:05,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1934703003, now seen corresponding path program 1 times [2022-07-14 06:24:05,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:05,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681489188] [2022-07-14 06:24:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:05,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:05,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:05,153 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) [2022-07-14 06:24:05,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:24:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:05,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:24:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:05,480 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 13 treesize of output 9 [2022-07-14 06:24:05,527 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 15 treesize of output 9 [2022-07-14 06:24:05,771 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-14 06:24:05,772 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 4 case distinctions, treesize of input 21 treesize of output 37 [2022-07-14 06:24:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:24:05,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:06,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:06,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681489188] [2022-07-14 06:24:06,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681489188] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-14 06:24:06,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:24:06,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-14 06:24:06,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690498756] [2022-07-14 06:24:06,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:06,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:24:06,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:06,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:24:06,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:24:06,241 INFO L87 Difference]: Start difference. First operand 262 states and 285 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-07-14 06:24:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:06,540 INFO L93 Difference]: Finished difference Result 290 states and 314 transitions. [2022-07-14 06:24:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:24:06,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 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 46 [2022-07-14 06:24:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:06,543 INFO L225 Difference]: With dead ends: 290 [2022-07-14 06:24:06,543 INFO L226 Difference]: Without dead ends: 290 [2022-07-14 06:24:06,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:24:06,544 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 57 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:06,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 263 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-07-14 06:24:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-07-14 06:24:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 264. [2022-07-14 06:24:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 207 states have (on average 1.3623188405797102) internal successors, (282), 257 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:24:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 288 transitions. [2022-07-14 06:24:06,552 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 288 transitions. Word has length 46 [2022-07-14 06:24:06,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:06,552 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 288 transitions. [2022-07-14 06:24:06,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-07-14 06:24:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 288 transitions. [2022-07-14 06:24:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:24:06,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:06,553 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:06,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:06,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:06,767 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1934703002, now seen corresponding path program 1 times [2022-07-14 06:24:06,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:06,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476517847] [2022-07-14 06:24:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:06,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:06,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:06,770 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) [2022-07-14 06:24:06,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:24:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:07,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:24:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:07,207 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 13 treesize of output 9 [2022-07-14 06:24:07,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-07-14 06:24:07,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:07,557 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:24:07,557 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 2 case distinctions, treesize of input 17 treesize of output 29 [2022-07-14 06:24:07,572 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:24:07,572 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 [2022-07-14 06:24:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:24:07,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:14,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:14,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476517847] [2022-07-14 06:24:14,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476517847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:24:14,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1387501780] [2022-07-14 06:24:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:14,011 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:24:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:24:14,012 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:24:14,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-07-14 06:24:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:14,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:24:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:14,462 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 [2022-07-14 06:24:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:14,524 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 [2022-07-14 06:24:14,791 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 13 treesize of output 9 [2022-07-14 06:24:15,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:15,867 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:24:15,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-07-14 06:24:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:16,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:16,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1387501780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:16,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:24:16,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2022-07-14 06:24:16,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642749070] [2022-07-14 06:24:16,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:16,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:24:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:24:16,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=256, Unknown=3, NotChecked=0, Total=306 [2022-07-14 06:24:16,093 INFO L87 Difference]: Start difference. First operand 264 states and 288 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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) [2022-07-14 06:24:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:17,320 INFO L93 Difference]: Finished difference Result 303 states and 330 transitions. [2022-07-14 06:24:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:24:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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 46 [2022-07-14 06:24:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:17,323 INFO L225 Difference]: With dead ends: 303 [2022-07-14 06:24:17,323 INFO L226 Difference]: Without dead ends: 303 [2022-07-14 06:24:17,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=60, Invalid=317, Unknown=3, NotChecked=0, Total=380 [2022-07-14 06:24:17,324 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 14 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:17,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 613 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 147 Unchecked, 1.1s Time] [2022-07-14 06:24:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-14 06:24:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2022-07-14 06:24:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 243 states have (on average 1.316872427983539) internal successors, (320), 293 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:24:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 329 transitions. [2022-07-14 06:24:17,330 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 329 transitions. Word has length 46 [2022-07-14 06:24:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:17,330 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 329 transitions. [2022-07-14 06:24:17,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 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) [2022-07-14 06:24:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 329 transitions. [2022-07-14 06:24:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:24:17,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:17,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:17,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:17,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:17,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:24:17,732 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2050875696, now seen corresponding path program 1 times [2022-07-14 06:24:17,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:17,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672489640] [2022-07-14 06:24:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:17,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:17,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:17,735 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) [2022-07-14 06:24:17,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 06:24:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:18,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:24:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:18,030 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 [2022-07-14 06:24:18,084 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 13 treesize of output 9 [2022-07-14 06:24:18,119 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 9 [2022-07-14 06:24:18,341 INFO L356 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2022-07-14 06:24:18,341 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 4 case distinctions, treesize of input 21 treesize of output 33 [2022-07-14 06:24:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:24:18,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:22,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672489640] [2022-07-14 06:24:22,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672489640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:24:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448551015] [2022-07-14 06:24:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:22,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:24:22,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:24:22,487 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:24:22,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-14 06:24:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:24:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:22,947 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 [2022-07-14 06:24:25,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:24:25,313 INFO L356 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-07-14 06:24:25,314 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 2 case distinctions, treesize of input 15 treesize of output 29 [2022-07-14 06:24:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:25,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:25,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448551015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:25,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:24:25,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-07-14 06:24:25,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509540961] [2022-07-14 06:24:25,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:25,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:24:25,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:24:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=78, Unknown=3, NotChecked=0, Total=110 [2022-07-14 06:24:25,334 INFO L87 Difference]: Start difference. First operand 302 states and 329 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-07-14 06:24:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:25,669 INFO L93 Difference]: Finished difference Result 352 states and 385 transitions. [2022-07-14 06:24:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:24:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 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 48 [2022-07-14 06:24:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:25,671 INFO L225 Difference]: With dead ends: 352 [2022-07-14 06:24:25,671 INFO L226 Difference]: Without dead ends: 352 [2022-07-14 06:24:25,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=29, Invalid=78, Unknown=3, NotChecked=0, Total=110 [2022-07-14 06:24:25,672 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 75 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:25,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 399 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2022-07-14 06:24:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-07-14 06:24:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 312. [2022-07-14 06:24:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 252 states have (on average 1.3174603174603174) internal successors, (332), 302 states have internal predecessors, (332), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:24:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 343 transitions. [2022-07-14 06:24:25,680 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 343 transitions. Word has length 48 [2022-07-14 06:24:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:25,680 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 343 transitions. [2022-07-14 06:24:25,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-07-14 06:24:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 343 transitions. [2022-07-14 06:24:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:24:25,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:25,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:25,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:25,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-14 06:24:26,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:26,087 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:26,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2050875697, now seen corresponding path program 1 times [2022-07-14 06:24:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:26,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27353676] [2022-07-14 06:24:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:26,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:26,090 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:24:26,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 06:24:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:24:26,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:26,524 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 [2022-07-14 06:24:26,533 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 [2022-07-14 06:24:26,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:24:26,743 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 9 [2022-07-14 06:24:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:27,123 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:24:27,123 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-14 06:24:27,143 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:24:27,143 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 [2022-07-14 06:24:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:24:27,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:29,475 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1787 (_ BitVec 32)) (v_ArrVal_1788 (_ BitVec 32)) (v_create_data_~data~0.base_65 (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_~node~0#1.offset|))) (and (bvule .cse0 (select (store (store |c_#length| v_create_data_~data~0.base_65 v_ArrVal_1787) v_ArrVal_1788 (_ bv80 32)) |c_ULTIMATE.start_append_~node~0#1.base|)) (bvule |c_ULTIMATE.start_append_~node~0#1.offset| .cse0))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_create_data_~data~0.base_65))))))) is different from false [2022-07-14 06:24:29,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:29,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27353676] [2022-07-14 06:24:29,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27353676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:24:29,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277944114] [2022-07-14 06:24:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:29,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:24:29,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:24:29,482 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:24:29,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-14 06:24:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:24:30,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:30,078 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 [2022-07-14 06:24:30,085 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 [2022-07-14 06:24:30,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:30,541 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:24:30,542 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-14 06:24:30,560 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:24:30,560 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 [2022-07-14 06:24:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:30,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:30,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [277944114] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:30,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:24:30,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-07-14 06:24:30,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017145914] [2022-07-14 06:24:30,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:30,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:24:30,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:24:30,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2022-07-14 06:24:30,584 INFO L87 Difference]: Start difference. First operand 312 states and 343 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-07-14 06:24:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:31,328 INFO L93 Difference]: Finished difference Result 376 states and 411 transitions. [2022-07-14 06:24:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:24:31,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 48 [2022-07-14 06:24:31,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:31,331 INFO L225 Difference]: With dead ends: 376 [2022-07-14 06:24:31,331 INFO L226 Difference]: Without dead ends: 376 [2022-07-14 06:24:31,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=28, Invalid=85, Unknown=1, NotChecked=18, Total=132 [2022-07-14 06:24:31,332 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 78 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:31,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 578 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 319 Invalid, 0 Unknown, 198 Unchecked, 0.7s Time] [2022-07-14 06:24:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-07-14 06:24:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 312. [2022-07-14 06:24:31,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 252 states have (on average 1.3134920634920635) internal successors, (331), 302 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:24:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 342 transitions. [2022-07-14 06:24:31,339 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 342 transitions. Word has length 48 [2022-07-14 06:24:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:31,340 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 342 transitions. [2022-07-14 06:24:31,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-07-14 06:24:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 342 transitions. [2022-07-14 06:24:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:24:31,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:31,341 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:31,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-07-14 06:24:31,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-14 06:24:31,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:31,748 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:31,748 INFO L85 PathProgramCache]: Analyzing trace with hash 471257990, now seen corresponding path program 1 times [2022-07-14 06:24:31,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:31,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570508455] [2022-07-14 06:24:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:31,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:31,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:31,750 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:24:31,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 06:24:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:24:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:31,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:31,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:31,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570508455] [2022-07-14 06:24:31,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570508455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:31,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:24:31,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:24:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134069760] [2022-07-14 06:24:31,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:24:31,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:24:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:24:31,980 INFO L87 Difference]: Start difference. First operand 312 states and 342 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-07-14 06:24:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:32,276 INFO L93 Difference]: Finished difference Result 311 states and 341 transitions. [2022-07-14 06:24:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:24:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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 48 [2022-07-14 06:24:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:32,278 INFO L225 Difference]: With dead ends: 311 [2022-07-14 06:24:32,278 INFO L226 Difference]: Without dead ends: 311 [2022-07-14 06:24:32,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:24:32,279 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 140 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:32,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 217 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:24:32,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-07-14 06:24:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2022-07-14 06:24:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 252 states have (on average 1.3095238095238095) internal successors, (330), 301 states have internal predecessors, (330), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:24:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 341 transitions. [2022-07-14 06:24:32,289 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 341 transitions. Word has length 48 [2022-07-14 06:24:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:32,290 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 341 transitions. [2022-07-14 06:24:32,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-07-14 06:24:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 341 transitions. [2022-07-14 06:24:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:24:32,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:32,291 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:32,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-14 06:24:32,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:32,499 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash 471257991, now seen corresponding path program 1 times [2022-07-14 06:24:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:32,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324291010] [2022-07-14 06:24:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:32,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:32,501 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) [2022-07-14 06:24:32,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 06:24:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:24:32,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:32,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:32,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:32,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324291010] [2022-07-14 06:24:32,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324291010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:32,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:24:32,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:24:32,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439169971] [2022-07-14 06:24:32,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:32,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:24:32,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:32,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:24:32,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:24:32,820 INFO L87 Difference]: Start difference. First operand 311 states and 341 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-07-14 06:24:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:33,240 INFO L93 Difference]: Finished difference Result 302 states and 332 transitions. [2022-07-14 06:24:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:24:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 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 48 [2022-07-14 06:24:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:33,243 INFO L225 Difference]: With dead ends: 302 [2022-07-14 06:24:33,243 INFO L226 Difference]: Without dead ends: 302 [2022-07-14 06:24:33,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:24:33,243 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 151 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:33,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 214 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:24:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-14 06:24:33,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2022-07-14 06:24:33,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 252 states have (on average 1.2738095238095237) internal successors, (321), 292 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:24:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 332 transitions. [2022-07-14 06:24:33,255 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 332 transitions. Word has length 48 [2022-07-14 06:24:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:33,255 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 332 transitions. [2022-07-14 06:24:33,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-07-14 06:24:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 332 transitions. [2022-07-14 06:24:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:24:33,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:33,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:33,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:33,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:33,468 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1724095953, now seen corresponding path program 1 times [2022-07-14 06:24:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:33,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701320368] [2022-07-14 06:24:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:33,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:33,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:33,471 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) [2022-07-14 06:24:33,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-14 06:24:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:33,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:24:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:33,755 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 [2022-07-14 06:24:33,769 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 [2022-07-14 06:24:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:33,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:33,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701320368] [2022-07-14 06:24:33,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701320368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:33,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:24:33,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:24:33,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585828039] [2022-07-14 06:24:33,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:33,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:24:33,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:33,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:24:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:24:33,780 INFO L87 Difference]: Start difference. First operand 302 states and 332 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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) [2022-07-14 06:24:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:34,343 INFO L93 Difference]: Finished difference Result 323 states and 354 transitions. [2022-07-14 06:24:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:24:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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 49 [2022-07-14 06:24:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:34,345 INFO L225 Difference]: With dead ends: 323 [2022-07-14 06:24:34,345 INFO L226 Difference]: Without dead ends: 323 [2022-07-14 06:24:34,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:24:34,346 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 150 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:34,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 359 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:24:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-14 06:24:34,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 301. [2022-07-14 06:24:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 252 states have (on average 1.2698412698412698) internal successors, (320), 291 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:24:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 331 transitions. [2022-07-14 06:24:34,362 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 331 transitions. Word has length 49 [2022-07-14 06:24:34,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:34,363 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 331 transitions. [2022-07-14 06:24:34,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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) [2022-07-14 06:24:34,363 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 331 transitions. [2022-07-14 06:24:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:24:34,364 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:34,364 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:34,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:34,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:34,577 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:34,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:34,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1724095954, now seen corresponding path program 1 times [2022-07-14 06:24:34,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:34,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686856226] [2022-07-14 06:24:34,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:34,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:34,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:34,579 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:24:34,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 06:24:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:34,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:24:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:34,973 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 [2022-07-14 06:24:34,982 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 [2022-07-14 06:24:35,009 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 [2022-07-14 06:24:35,015 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 [2022-07-14 06:24:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:35,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:35,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:35,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686856226] [2022-07-14 06:24:35,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686856226] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:35,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:24:35,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:24:35,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078923592] [2022-07-14 06:24:35,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:35,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:24:35,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:24:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:24:35,038 INFO L87 Difference]: Start difference. First operand 301 states and 331 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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) [2022-07-14 06:24:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:35,826 INFO L93 Difference]: Finished difference Result 339 states and 370 transitions. [2022-07-14 06:24:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:24:35,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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 49 [2022-07-14 06:24:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:35,828 INFO L225 Difference]: With dead ends: 339 [2022-07-14 06:24:35,828 INFO L226 Difference]: Without dead ends: 339 [2022-07-14 06:24:35,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:24:35,829 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 181 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:35,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 343 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-14 06:24:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-07-14 06:24:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 300. [2022-07-14 06:24:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 252 states have (on average 1.2658730158730158) internal successors, (319), 290 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:24:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 330 transitions. [2022-07-14 06:24:35,835 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 330 transitions. Word has length 49 [2022-07-14 06:24:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:35,836 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 330 transitions. [2022-07-14 06:24:35,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 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) [2022-07-14 06:24:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 330 transitions. [2022-07-14 06:24:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:24:35,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:35,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:35,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:36,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:36,049 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash -498440897, now seen corresponding path program 1 times [2022-07-14 06:24:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:36,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374377079] [2022-07-14 06:24:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:36,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:36,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:36,052 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) [2022-07-14 06:24:36,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-14 06:24:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:24:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:36,408 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 13 treesize of output 9 [2022-07-14 06:24:36,461 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 9 [2022-07-14 06:24:36,710 INFO L356 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2022-07-14 06:24:36,711 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 4 case distinctions, treesize of input 21 treesize of output 33 [2022-07-14 06:24:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:24:36,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:40,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:40,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374377079] [2022-07-14 06:24:40,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374377079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:24:40,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1525006520] [2022-07-14 06:24:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:40,960 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:24:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:24:40,961 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) [2022-07-14 06:24:40,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-07-14 06:24:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:24:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:41,628 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 [2022-07-14 06:24:42,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:42,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:42,352 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:24:42,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 26 [2022-07-14 06:24:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:42,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:42,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1525006520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:42,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:24:42,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-07-14 06:24:42,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609178809] [2022-07-14 06:24:42,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:24:42,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:24:42,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=170, Unknown=2, NotChecked=0, Total=210 [2022-07-14 06:24:42,449 INFO L87 Difference]: Start difference. First operand 300 states and 330 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 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) [2022-07-14 06:24:42,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:42,952 INFO L93 Difference]: Finished difference Result 317 states and 349 transitions. [2022-07-14 06:24:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:24:42,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 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 50 [2022-07-14 06:24:42,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:42,954 INFO L225 Difference]: With dead ends: 317 [2022-07-14 06:24:42,954 INFO L226 Difference]: Without dead ends: 317 [2022-07-14 06:24:42,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-14 06:24:42,955 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 13 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:42,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 637 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 145 Unchecked, 0.4s Time] [2022-07-14 06:24:42,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-14 06:24:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 313. [2022-07-14 06:24:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 264 states have (on average 1.2613636363636365) internal successors, (333), 303 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 7 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 06:24:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 344 transitions. [2022-07-14 06:24:42,961 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 344 transitions. Word has length 50 [2022-07-14 06:24:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:42,961 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 344 transitions. [2022-07-14 06:24:42,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 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) [2022-07-14 06:24:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 344 transitions. [2022-07-14 06:24:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 06:24:42,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:42,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:42,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-07-14 06:24:43,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-07-14 06:24:43,369 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 [2022-07-14 06:24:43,369 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash -498440896, now seen corresponding path program 1 times [2022-07-14 06:24:43,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:43,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919568457] [2022-07-14 06:24:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:43,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:43,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:43,371 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) [2022-07-14 06:24:43,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-14 06:24:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:24:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:43,857 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 13 treesize of output 9 [2022-07-14 06:24:43,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-07-14 06:24:44,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:44,296 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:24:44,296 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 2 case distinctions, treesize of input 17 treesize of output 29 [2022-07-14 06:24:44,312 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:24:44,313 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 [2022-07-14 06:24:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:24:44,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:51,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919568457] [2022-07-14 06:24:51,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919568457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:24:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1413036521] [2022-07-14 06:24:51,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:51,138 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:24:51,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:24:51,140 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) [2022-07-14 06:24:51,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-14 06:24:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:51,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:24:51,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:51,683 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 [2022-07-14 06:24:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:51,739 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 [2022-07-14 06:24:51,960 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 13 treesize of output 9 [2022-07-14 06:24:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:24:52,798 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:24:52,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-07-14 06:24:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:52,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:52,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1413036521] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:52,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:24:52,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2022-07-14 06:24:52,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424394277] [2022-07-14 06:24:52,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:52,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:24:52,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:24:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=257, Unknown=2, NotChecked=0, Total=306 [2022-07-14 06:24:52,973 INFO L87 Difference]: Start difference. First operand 313 states and 344 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 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) [2022-07-14 06:24:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:53,631 INFO L93 Difference]: Finished difference Result 317 states and 348 transitions. [2022-07-14 06:24:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:24:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 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 50 [2022-07-14 06:24:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:53,633 INFO L225 Difference]: With dead ends: 317 [2022-07-14 06:24:53,633 INFO L226 Difference]: Without dead ends: 317 [2022-07-14 06:24:53,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=60, Invalid=318, Unknown=2, NotChecked=0, Total=380 [2022-07-14 06:24:53,633 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 13 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:53,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 512 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 128 Unchecked, 0.5s Time] [2022-07-14 06:24:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-14 06:24:53,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 307. [2022-07-14 06:24:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 259 states have (on average 1.2625482625482625) internal successors, (327), 297 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 06:24:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 337 transitions. [2022-07-14 06:24:53,639 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 337 transitions. Word has length 50 [2022-07-14 06:24:53,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:53,640 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 337 transitions. [2022-07-14 06:24:53,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 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) [2022-07-14 06:24:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 337 transitions. [2022-07-14 06:24:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:24:53,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:53,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:53,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:53,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-07-14 06:24:54,054 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 [2022-07-14 06:24:54,055 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash -42553449, now seen corresponding path program 1 times [2022-07-14 06:24:54,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:54,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400250732] [2022-07-14 06:24:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:54,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:54,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:54,057 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) [2022-07-14 06:24:54,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-14 06:24:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:24:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:54,478 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 [2022-07-14 06:24:54,510 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 [2022-07-14 06:24:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:54,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:54,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400250732] [2022-07-14 06:24:54,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400250732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:54,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:24:54,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:24:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295659888] [2022-07-14 06:24:54,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:54,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:24:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:54,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:24:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:24:54,524 INFO L87 Difference]: Start difference. First operand 307 states and 337 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-07-14 06:24:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:55,131 INFO L93 Difference]: Finished difference Result 329 states and 360 transitions. [2022-07-14 06:24:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:24:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-07-14 06:24:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:55,133 INFO L225 Difference]: With dead ends: 329 [2022-07-14 06:24:55,133 INFO L226 Difference]: Without dead ends: 329 [2022-07-14 06:24:55,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:24:55,134 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 182 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:55,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 328 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:24:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-07-14 06:24:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 306. [2022-07-14 06:24:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 259 states have (on average 1.2586872586872586) internal successors, (326), 296 states have internal predecessors, (326), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 06:24:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 336 transitions. [2022-07-14 06:24:55,139 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 336 transitions. Word has length 53 [2022-07-14 06:24:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:55,139 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 336 transitions. [2022-07-14 06:24:55,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-07-14 06:24:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 336 transitions. [2022-07-14 06:24:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:24:55,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:55,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:55,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:55,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:55,353 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:55,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:55,353 INFO L85 PathProgramCache]: Analyzing trace with hash -42553448, now seen corresponding path program 1 times [2022-07-14 06:24:55,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:55,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146196888] [2022-07-14 06:24:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:55,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:55,355 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) [2022-07-14 06:24:55,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-14 06:24:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:24:55,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:55,740 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 [2022-07-14 06:24:55,746 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 [2022-07-14 06:24:55,794 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 [2022-07-14 06:24:55,798 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 [2022-07-14 06:24:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:55,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:24:55,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:55,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146196888] [2022-07-14 06:24:55,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146196888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:24:55,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:24:55,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:24:55,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303244199] [2022-07-14 06:24:55,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:24:55,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:24:55,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:24:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:24:55,819 INFO L87 Difference]: Start difference. First operand 306 states and 336 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-07-14 06:24:56,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:56,471 INFO L93 Difference]: Finished difference Result 345 states and 376 transitions. [2022-07-14 06:24:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:24:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-07-14 06:24:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:56,474 INFO L225 Difference]: With dead ends: 345 [2022-07-14 06:24:56,474 INFO L226 Difference]: Without dead ends: 345 [2022-07-14 06:24:56,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:24:56,475 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 268 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:56,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 314 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:24:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-14 06:24:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 305. [2022-07-14 06:24:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 259 states have (on average 1.2548262548262548) internal successors, (325), 295 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 06:24:56,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 335 transitions. [2022-07-14 06:24:56,481 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 335 transitions. Word has length 53 [2022-07-14 06:24:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:56,481 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 335 transitions. [2022-07-14 06:24:56,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-07-14 06:24:56,482 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 335 transitions. [2022-07-14 06:24:56,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:24:56,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:56,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:56,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:24:56,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:56,694 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting create_dataErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:56,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1556982670, now seen corresponding path program 1 times [2022-07-14 06:24:56,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:56,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029601540] [2022-07-14 06:24:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:56,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:56,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:56,696 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:24:56,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-14 06:24:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:57,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:24:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:57,243 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 [2022-07-14 06:24:57,292 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:24:57,292 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 [2022-07-14 06:24:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:57,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:57,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:57,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029601540] [2022-07-14 06:24:57,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029601540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:24:57,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:24:57,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-14 06:24:57,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249225597] [2022-07-14 06:24:57,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:24:57,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:24:57,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:57,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:24:57,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:24:57,357 INFO L87 Difference]: Start difference. First operand 305 states and 335 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:24:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:57,766 INFO L93 Difference]: Finished difference Result 310 states and 340 transitions. [2022-07-14 06:24:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:24:57,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-14 06:24:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:57,768 INFO L225 Difference]: With dead ends: 310 [2022-07-14 06:24:57,768 INFO L226 Difference]: Without dead ends: 310 [2022-07-14 06:24:57,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:24:57,771 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 49 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:57,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 240 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:24:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-07-14 06:24:57,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 304. [2022-07-14 06:24:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 259 states have (on average 1.247104247104247) internal successors, (323), 294 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 06:24:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 333 transitions. [2022-07-14 06:24:57,776 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 333 transitions. Word has length 53 [2022-07-14 06:24:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:57,777 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 333 transitions. [2022-07-14 06:24:57,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:24:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 333 transitions. [2022-07-14 06:24:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-14 06:24:57,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:57,778 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:57,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-07-14 06:24:57,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:57,991 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting create_dataErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1556982671, now seen corresponding path program 1 times [2022-07-14 06:24:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:57,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080219984] [2022-07-14 06:24:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:57,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:57,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:57,994 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:24:57,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-14 06:24:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:24:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:24:58,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:24:58,559 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 [2022-07-14 06:24:58,636 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:24:58,636 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 [2022-07-14 06:24:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:58,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:24:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:24:59,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:24:59,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080219984] [2022-07-14 06:24:59,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080219984] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:24:59,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:24:59,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2022-07-14 06:24:59,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819204667] [2022-07-14 06:24:59,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:24:59,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:24:59,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:24:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:24:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:24:59,024 INFO L87 Difference]: Start difference. First operand 304 states and 333 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:24:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:24:59,630 INFO L93 Difference]: Finished difference Result 312 states and 338 transitions. [2022-07-14 06:24:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:24:59,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-14 06:24:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:24:59,632 INFO L225 Difference]: With dead ends: 312 [2022-07-14 06:24:59,632 INFO L226 Difference]: Without dead ends: 312 [2022-07-14 06:24:59,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:24:59,632 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 63 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:24:59,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 418 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 126 Invalid, 0 Unknown, 114 Unchecked, 0.6s Time] [2022-07-14 06:24:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-14 06:24:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2022-07-14 06:24:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 243 states have (on average 1.2222222222222223) internal successors, (297), 274 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 06:24:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 307 transitions. [2022-07-14 06:24:59,637 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 307 transitions. Word has length 53 [2022-07-14 06:24:59,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:24:59,638 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 307 transitions. [2022-07-14 06:24:59,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:24:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 307 transitions. [2022-07-14 06:24:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:24:59,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:24:59,639 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:24:59,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-07-14 06:24:59,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:24:59,854 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:24:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:24:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1319156755, now seen corresponding path program 1 times [2022-07-14 06:24:59,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:24:59,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878669670] [2022-07-14 06:24:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:24:59,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:24:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:24:59,857 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:24:59,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-14 06:25:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:00,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:25:00,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:00,403 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 [2022-07-14 06:25:00,463 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 [2022-07-14 06:25:00,484 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-07-14 06:25:00,484 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2022-07-14 06:25:00,610 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 [2022-07-14 06:25:00,661 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:25:00,662 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 34 treesize of output 25 [2022-07-14 06:25:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:25:00,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:25:00,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:25:00,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878669670] [2022-07-14 06:25:00,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878669670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:25:00,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:25:00,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:25:00,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518114806] [2022-07-14 06:25:00,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:25:00,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:25:00,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:25:00,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:25:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:25:00,715 INFO L87 Difference]: Start difference. First operand 284 states and 307 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 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) [2022-07-14 06:25:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:25:01,908 INFO L93 Difference]: Finished difference Result 425 states and 474 transitions. [2022-07-14 06:25:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:25:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 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 54 [2022-07-14 06:25:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:25:01,910 INFO L225 Difference]: With dead ends: 425 [2022-07-14 06:25:01,910 INFO L226 Difference]: Without dead ends: 425 [2022-07-14 06:25:01,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:25:01,911 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 309 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:25:01,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 558 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 490 Invalid, 0 Unknown, 107 Unchecked, 1.0s Time] [2022-07-14 06:25:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-07-14 06:25:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 326. [2022-07-14 06:25:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 282 states have (on average 1.2588652482269505) internal successors, (355), 310 states have internal predecessors, (355), 5 states have call successors, (5), 3 states have call predecessors, (5), 7 states have return successors, (15), 12 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-14 06:25:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 375 transitions. [2022-07-14 06:25:01,918 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 375 transitions. Word has length 54 [2022-07-14 06:25:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:25:01,918 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 375 transitions. [2022-07-14 06:25:01,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 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) [2022-07-14 06:25:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 375 transitions. [2022-07-14 06:25:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:25:01,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:25:01,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:25:01,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:25:02,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:25:02,133 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:25:02,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:25:02,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1319156754, now seen corresponding path program 1 times [2022-07-14 06:25:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:25:02,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733287743] [2022-07-14 06:25:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:02,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:25:02,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:25:02,137 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:25:02,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-14 06:25:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:02,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:25:02,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:02,588 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 [2022-07-14 06:25:02,624 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:25:02,624 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 11 treesize of output 11 [2022-07-14 06:25:03,030 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 [2022-07-14 06:25:03,051 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 [2022-07-14 06:25:03,129 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 21 treesize of output 20 [2022-07-14 06:25:03,136 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 23 treesize of output 22 [2022-07-14 06:25:03,315 INFO L356 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-07-14 06:25:03,316 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 37 [2022-07-14 06:25:03,343 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 06:25:03,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-07-14 06:25:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:25:03,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:25:03,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:25:03,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733287743] [2022-07-14 06:25:03,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733287743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:25:03,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:25:03,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:25:03,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697085079] [2022-07-14 06:25:03,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:25:03,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:25:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:25:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:25:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:25:03,385 INFO L87 Difference]: Start difference. First operand 326 states and 375 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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) [2022-07-14 06:25:05,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:25:05,734 INFO L93 Difference]: Finished difference Result 532 states and 600 transitions. [2022-07-14 06:25:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:25:05,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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 54 [2022-07-14 06:25:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:25:05,736 INFO L225 Difference]: With dead ends: 532 [2022-07-14 06:25:05,736 INFO L226 Difference]: Without dead ends: 532 [2022-07-14 06:25:05,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:25:05,737 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 324 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:25:05,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 762 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 739 Invalid, 0 Unknown, 172 Unchecked, 1.9s Time] [2022-07-14 06:25:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-14 06:25:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 350. [2022-07-14 06:25:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 305 states have (on average 1.2655737704918033) internal successors, (386), 331 states have internal predecessors, (386), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (19), 15 states have call predecessors, (19), 6 states have call successors, (19) [2022-07-14 06:25:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 411 transitions. [2022-07-14 06:25:05,745 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 411 transitions. Word has length 54 [2022-07-14 06:25:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:25:05,746 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 411 transitions. [2022-07-14 06:25:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 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) [2022-07-14 06:25:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 411 transitions. [2022-07-14 06:25:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:25:05,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:25:05,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:25:05,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-07-14 06:25:05,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:25:05,951 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:25:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:25:05,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1610777395, now seen corresponding path program 1 times [2022-07-14 06:25:05,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:25:05,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983136087] [2022-07-14 06:25:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:05,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:25:05,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:25:05,954 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:25:05,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-07-14 06:25:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:25:06,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:06,591 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 [2022-07-14 06:25:07,207 INFO L356 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2022-07-14 06:25:07,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 57 [2022-07-14 06:25:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:25:07,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:25:11,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:25:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983136087] [2022-07-14 06:25:11,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983136087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:25:11,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1386153875] [2022-07-14 06:25:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:11,480 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:25:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:25:11,481 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:25:11,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-07-14 06:25:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:25:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:12,330 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 [2022-07-14 06:25:23,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:25:23,336 INFO L356 Elim1Store]: treesize reduction 70, result has 34.6 percent of original size [2022-07-14 06:25:23,336 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 5 case distinctions, treesize of input 28 treesize of output 53 [2022-07-14 06:25:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:25:23,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:25:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:25:31,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1386153875] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-14 06:25:31,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:25:31,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 16 [2022-07-14 06:25:31,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160010153] [2022-07-14 06:25:31,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:25:31,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:25:31,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:25:31,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:25:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=214, Unknown=10, NotChecked=0, Total=306 [2022-07-14 06:25:31,051 INFO L87 Difference]: Start difference. First operand 350 states and 411 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-07-14 06:25:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:25:31,226 INFO L93 Difference]: Finished difference Result 393 states and 461 transitions. [2022-07-14 06:25:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:25:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 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 55 [2022-07-14 06:25:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:25:31,228 INFO L225 Difference]: With dead ends: 393 [2022-07-14 06:25:31,228 INFO L226 Difference]: Without dead ends: 393 [2022-07-14 06:25:31,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=82, Invalid=214, Unknown=10, NotChecked=0, Total=306 [2022-07-14 06:25:31,229 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 65 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:25:31,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 344 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-07-14 06:25:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-14 06:25:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 369. [2022-07-14 06:25:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 323 states have (on average 1.263157894736842) internal successors, (408), 348 states have internal predecessors, (408), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (23), 17 states have call predecessors, (23), 6 states have call successors, (23) [2022-07-14 06:25:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 437 transitions. [2022-07-14 06:25:31,236 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 437 transitions. Word has length 55 [2022-07-14 06:25:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:25:31,236 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 437 transitions. [2022-07-14 06:25:31,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-07-14 06:25:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 437 transitions. [2022-07-14 06:25:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:25:31,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:25:31,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:25:31,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-07-14 06:25:31,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-07-14 06:25:31,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:25:31,653 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:25:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:25:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1610777396, now seen corresponding path program 1 times [2022-07-14 06:25:31,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:25:31,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588230478] [2022-07-14 06:25:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:31,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:25:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:25:31,656 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:25:31,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-07-14 06:25:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:32,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:25:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:32,379 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 [2022-07-14 06:25:32,385 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 [2022-07-14 06:25:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:25:33,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:25:33,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:25:33,208 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-14 06:25:33,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-07-14 06:25:33,268 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-14 06:25:33,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-07-14 06:25:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:25:33,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:25:35,627 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4268 (_ BitVec 32)) (|v_create_data_#t~malloc7.base_69| (_ BitVec 32)) (v_ArrVal_4269 (_ BitVec 32)) (v_create_data_~data~0.base_93 (_ BitVec 32)) (v_create_data_~nextData~0.base_29 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_create_data_~data~0.base_93 (_ bv1 1)) |v_create_data_#t~malloc7.base_69|)))) (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_~node~0#1.offset|))) (and (bvule .cse0 (select (store (store (store |c_#length| v_create_data_~data~0.base_93 v_ArrVal_4268) |v_create_data_#t~malloc7.base_69| v_ArrVal_4269) v_create_data_~nextData~0.base_29 (_ bv16 32)) |c_ULTIMATE.start_append_~node~0#1.base|)) (bvule |c_ULTIMATE.start_append_~node~0#1.offset| .cse0))) (not (= (bvneg (bvneg (select |c_#valid| v_create_data_~data~0.base_93))) (_ bv0 1))))) is different from false [2022-07-14 06:25:35,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:25:35,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588230478] [2022-07-14 06:25:35,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588230478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:25:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [204102327] [2022-07-14 06:25:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:35,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:25:35,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:25:35,635 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:25:35,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-07-14 06:25:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:36,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:25:36,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:36,642 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 [2022-07-14 06:25:36,651 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 [2022-07-14 06:25:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:25:39,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:25:39,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:25:39,404 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-14 06:25:39,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 36 [2022-07-14 06:25:39,436 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-07-14 06:25:39,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-07-14 06:25:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:25:39,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:25:41,619 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4466 (_ BitVec 32)) (v_ArrVal_4467 (_ BitVec 32)) (v_create_data_~nextData~0.base_32 (_ BitVec 32)) (v_create_data_~data~0.base_99 (_ BitVec 32)) (|v_create_data_#t~malloc7.base_76| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_append_~node~0#1.offset|))) (and (bvule .cse0 (select (store (store (store |c_#length| v_create_data_~data~0.base_99 v_ArrVal_4466) |v_create_data_#t~malloc7.base_76| v_ArrVal_4467) v_create_data_~nextData~0.base_32 (_ bv16 32)) |c_ULTIMATE.start_append_~node~0#1.base|)) (bvule |c_ULTIMATE.start_append_~node~0#1.offset| .cse0))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_99)))) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_create_data_~data~0.base_99 (_ bv1 1)) |v_create_data_#t~malloc7.base_76|)))))) is different from false [2022-07-14 06:25:41,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [204102327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:25:41,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:25:41,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 8 [2022-07-14 06:25:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136347452] [2022-07-14 06:25:41,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:25:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:25:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:25:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:25:41,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=72, Unknown=2, NotChecked=34, Total=132 [2022-07-14 06:25:41,624 INFO L87 Difference]: Start difference. First operand 369 states and 437 transitions. Second operand has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2022-07-14 06:25:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:25:42,167 INFO L93 Difference]: Finished difference Result 464 states and 548 transitions. [2022-07-14 06:25:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:25:42,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 55 [2022-07-14 06:25:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:25:42,169 INFO L225 Difference]: With dead ends: 464 [2022-07-14 06:25:42,169 INFO L226 Difference]: Without dead ends: 464 [2022-07-14 06:25:42,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=29, Invalid=87, Unknown=2, NotChecked=38, Total=156 [2022-07-14 06:25:42,170 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 67 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:25:42,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 740 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 294 Unchecked, 0.5s Time] [2022-07-14 06:25:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-07-14 06:25:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 384. [2022-07-14 06:25:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 337 states have (on average 1.2551928783382789) internal successors, (423), 362 states have internal predecessors, (423), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (27), 18 states have call predecessors, (27), 6 states have call successors, (27) [2022-07-14 06:25:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 456 transitions. [2022-07-14 06:25:42,178 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 456 transitions. Word has length 55 [2022-07-14 06:25:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:25:42,179 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 456 transitions. [2022-07-14 06:25:42,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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) [2022-07-14 06:25:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 456 transitions. [2022-07-14 06:25:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:25:42,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:25:42,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:25:42,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-07-14 06:25:42,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-07-14 06:25:42,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:25:42,591 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:25:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:25:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash 948367782, now seen corresponding path program 1 times [2022-07-14 06:25:42,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:25:42,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60875102] [2022-07-14 06:25:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:42,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:25:42,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:25:42,593 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:25:42,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-07-14 06:25:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:43,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:25:43,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:43,124 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 [2022-07-14 06:25:43,173 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 13 treesize of output 9 [2022-07-14 06:25:43,217 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 9 [2022-07-14 06:25:43,607 INFO L356 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2022-07-14 06:25:43,608 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 4 case distinctions, treesize of input 21 treesize of output 33 [2022-07-14 06:25:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:25:43,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:25:47,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:25:47,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60875102] [2022-07-14 06:25:47,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60875102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:25:47,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814888734] [2022-07-14 06:25:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:47,844 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:25:47,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:25:47,845 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:25:47,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-07-14 06:25:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:25:48,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:48,568 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 [2022-07-14 06:25:50,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:25:50,964 INFO L356 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2022-07-14 06:25:50,964 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 2 case distinctions, treesize of input 15 treesize of output 29 [2022-07-14 06:25:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-14 06:25:50,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:25:50,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814888734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:25:50,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:25:50,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2022-07-14 06:25:50,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259071858] [2022-07-14 06:25:50,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:25:50,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:25:50,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:25:50,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:25:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2022-07-14 06:25:50,984 INFO L87 Difference]: Start difference. First operand 384 states and 456 transitions. Second operand has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2022-07-14 06:25:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:25:51,303 INFO L93 Difference]: Finished difference Result 413 states and 486 transitions. [2022-07-14 06:25:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:25:51,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-07-14 06:25:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:25:51,305 INFO L225 Difference]: With dead ends: 413 [2022-07-14 06:25:51,306 INFO L226 Difference]: Without dead ends: 413 [2022-07-14 06:25:51,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=33, Invalid=96, Unknown=3, NotChecked=0, Total=132 [2022-07-14 06:25:51,306 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 60 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:25:51,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 387 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2022-07-14 06:25:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-14 06:25:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 384. [2022-07-14 06:25:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 337 states have (on average 1.2492581602373887) internal successors, (421), 362 states have internal predecessors, (421), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (27), 18 states have call predecessors, (27), 6 states have call successors, (27) [2022-07-14 06:25:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 454 transitions. [2022-07-14 06:25:51,314 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 454 transitions. Word has length 56 [2022-07-14 06:25:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:25:51,314 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 454 transitions. [2022-07-14 06:25:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2022-07-14 06:25:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 454 transitions. [2022-07-14 06:25:51,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:25:51,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:25:51,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:25:51,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-07-14 06:25:51,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-07-14 06:25:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:25:51,729 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:25:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:25:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash 948367783, now seen corresponding path program 1 times [2022-07-14 06:25:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:25:51,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172939710] [2022-07-14 06:25:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:51,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:25:51,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:25:51,732 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:25:51,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-07-14 06:25:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:52,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:25:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:25:52,162 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 [2022-07-14 06:25:52,166 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 [2022-07-14 06:25:52,240 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 13 treesize of output 9 [2022-07-14 06:25:52,277 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 9 [2022-07-14 06:25:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:25:52,634 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:25:52,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-14 06:25:52,649 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:25:52,650 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 [2022-07-14 06:25:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:25:52,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:25:59,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:25:59,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172939710] [2022-07-14 06:25:59,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172939710] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:25:59,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [708311365] [2022-07-14 06:25:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:25:59,221 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:25:59,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:25:59,222 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:25:59,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-07-14 06:25:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:25:59,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:25:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:00,013 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 [2022-07-14 06:26:00,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:26:00,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:00,478 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:26:00,479 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-14 06:26:00,494 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:26:00,495 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 [2022-07-14 06:26:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-14 06:26:00,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:26:00,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [708311365] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:26:00,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:26:00,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-07-14 06:26:00,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138933707] [2022-07-14 06:26:00,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:26:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:26:00,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:26:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:26:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=83, Unknown=3, NotChecked=0, Total=110 [2022-07-14 06:26:00,523 INFO L87 Difference]: Start difference. First operand 384 states and 454 transitions. Second operand has 7 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2022-07-14 06:26:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:26:01,087 INFO L93 Difference]: Finished difference Result 443 states and 521 transitions. [2022-07-14 06:26:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:26:01,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-07-14 06:26:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:26:01,089 INFO L225 Difference]: With dead ends: 443 [2022-07-14 06:26:01,089 INFO L226 Difference]: Without dead ends: 443 [2022-07-14 06:26:01,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=30, Invalid=99, Unknown=3, NotChecked=0, Total=132 [2022-07-14 06:26:01,089 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 63 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:26:01,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 530 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 176 Unchecked, 0.5s Time] [2022-07-14 06:26:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-14 06:26:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 382. [2022-07-14 06:26:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 335 states have (on average 1.2447761194029852) internal successors, (417), 362 states have internal predecessors, (417), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (27), 16 states have call predecessors, (27), 6 states have call successors, (27) [2022-07-14 06:26:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 450 transitions. [2022-07-14 06:26:01,107 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 450 transitions. Word has length 56 [2022-07-14 06:26:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:26:01,107 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 450 transitions. [2022-07-14 06:26:01,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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) [2022-07-14 06:26:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 450 transitions. [2022-07-14 06:26:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:26:01,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:26:01,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:26:01,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-07-14 06:26:01,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-07-14 06:26:01,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:26:01,523 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_LEAK === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:26:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:26:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1897094198, now seen corresponding path program 1 times [2022-07-14 06:26:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:26:01,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667222052] [2022-07-14 06:26:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:01,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:26:01,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:26:01,525 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:26:01,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-07-14 06:26:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:26:01,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:01,964 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 [2022-07-14 06:26:02,001 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 [2022-07-14 06:26:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:26:02,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:26:02,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:26:02,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667222052] [2022-07-14 06:26:02,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667222052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:26:02,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:26:02,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:26:02,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246175133] [2022-07-14 06:26:02,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:26:02,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:26:02,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:26:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:26:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:26:02,017 INFO L87 Difference]: Start difference. First operand 382 states and 450 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2022-07-14 06:26:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:26:02,402 INFO L93 Difference]: Finished difference Result 420 states and 488 transitions. [2022-07-14 06:26:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:26:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-07-14 06:26:02,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:26:02,405 INFO L225 Difference]: With dead ends: 420 [2022-07-14 06:26:02,405 INFO L226 Difference]: Without dead ends: 420 [2022-07-14 06:26:02,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:26:02,406 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 149 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:26:02,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 353 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:26:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-07-14 06:26:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 384. [2022-07-14 06:26:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 337 states have (on average 1.2433234421364985) internal successors, (419), 364 states have internal predecessors, (419), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (27), 16 states have call predecessors, (27), 6 states have call successors, (27) [2022-07-14 06:26:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 452 transitions. [2022-07-14 06:26:02,413 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 452 transitions. Word has length 57 [2022-07-14 06:26:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:26:02,414 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 452 transitions. [2022-07-14 06:26:02,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2022-07-14 06:26:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 452 transitions. [2022-07-14 06:26:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:26:02,415 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:26:02,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:26:02,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-07-14 06:26:02,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:26:02,627 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:26:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:26:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1897093746, now seen corresponding path program 1 times [2022-07-14 06:26:02,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:26:02,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634057891] [2022-07-14 06:26:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:02,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:26:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:26:02,629 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:26:02,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-07-14 06:26:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:26:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:03,089 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 [2022-07-14 06:26:03,149 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 [2022-07-14 06:26:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:26:03,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:26:03,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:26:03,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634057891] [2022-07-14 06:26:03,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634057891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:26:03,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:26:03,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:26:03,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336781684] [2022-07-14 06:26:03,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:26:03,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:26:03,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:26:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:26:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:26:03,165 INFO L87 Difference]: Start difference. First operand 384 states and 452 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 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) [2022-07-14 06:26:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:26:03,868 INFO L93 Difference]: Finished difference Result 402 states and 470 transitions. [2022-07-14 06:26:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:26:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-07-14 06:26:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:26:03,871 INFO L225 Difference]: With dead ends: 402 [2022-07-14 06:26:03,871 INFO L226 Difference]: Without dead ends: 402 [2022-07-14 06:26:03,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:26:03,873 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 121 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:26:03,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 340 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:26:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-14 06:26:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 386. [2022-07-14 06:26:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 339 states have (on average 1.2448377581120944) internal successors, (422), 366 states have internal predecessors, (422), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (27), 16 states have call predecessors, (27), 6 states have call successors, (27) [2022-07-14 06:26:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 455 transitions. [2022-07-14 06:26:03,882 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 455 transitions. Word has length 57 [2022-07-14 06:26:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:26:03,884 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 455 transitions. [2022-07-14 06:26:03,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 states have internal predecessors, (45), 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) [2022-07-14 06:26:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 455 transitions. [2022-07-14 06:26:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:26:03,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:26:03,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:26:03,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-07-14 06:26:04,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:26:04,085 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:26:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:26:04,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1897093745, now seen corresponding path program 1 times [2022-07-14 06:26:04,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:26:04,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32814946] [2022-07-14 06:26:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:04,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:26:04,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:26:04,088 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:26:04,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-07-14 06:26:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 06:26:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:04,578 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 [2022-07-14 06:26:04,589 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 [2022-07-14 06:26:04,771 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 13 treesize of output 9 [2022-07-14 06:26:04,825 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 9 [2022-07-14 06:26:05,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:05,140 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:26:05,141 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-14 06:26:05,162 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:26:05,162 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 [2022-07-14 06:26:05,311 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 [2022-07-14 06:26:05,320 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 [2022-07-14 06:26:05,615 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 [2022-07-14 06:26:05,620 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 [2022-07-14 06:26:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:26:05,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:26:05,883 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 40 treesize of output 32 [2022-07-14 06:26:05,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:05,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:05,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:08,217 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5333 (_ BitVec 32)) (v_ArrVal_5332 (_ BitVec 32)) (v_create_data_~data~0.base_108 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_create_data_~data~0.base_108)))) (let ((.cse0 (bvadd |c_ULTIMATE.start_append_~node~0#1.offset| (_ bv8 32)))) (and (bvule (bvadd (_ bv4 32) |c_ULTIMATE.start_append_~node~0#1.offset|) .cse0) (bvule .cse0 (select (store (store |c_#length| v_create_data_~data~0.base_108 v_ArrVal_5333) v_ArrVal_5332 (_ bv80 32)) |c_ULTIMATE.start_append_~node~0#1.base|)) (= |c_ULTIMATE.start_main_~#list~0#1.offset| |c_ULTIMATE.start_append_~pointerToList#1.offset|) (= |c_ULTIMATE.start_main_~#list~0#1.base| |c_ULTIMATE.start_append_~pointerToList#1.base|))))) is different from false [2022-07-14 06:26:08,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:26:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32814946] [2022-07-14 06:26:08,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32814946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:26:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [581148036] [2022-07-14 06:26:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:08,222 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:26:08,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:26:08,224 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:26:08,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-07-14 06:26:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 06:26:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:09,412 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 [2022-07-14 06:26:09,548 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 [2022-07-14 06:26:09,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:09,561 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 20 treesize of output 19 [2022-07-14 06:26:09,690 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 [2022-07-14 06:26:09,824 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:26:09,825 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 31 treesize of output 14 [2022-07-14 06:26:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:26:09,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:26:09,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [581148036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:26:09,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:26:09,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 20 [2022-07-14 06:26:09,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569694268] [2022-07-14 06:26:09,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:26:09,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:26:09,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:26:09,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:26:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=456, Unknown=1, NotChecked=42, Total=552 [2022-07-14 06:26:09,929 INFO L87 Difference]: Start difference. First operand 386 states and 455 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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) [2022-07-14 06:26:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:26:10,456 INFO L93 Difference]: Finished difference Result 423 states and 496 transitions. [2022-07-14 06:26:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:26:10,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-07-14 06:26:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:26:10,458 INFO L225 Difference]: With dead ends: 423 [2022-07-14 06:26:10,458 INFO L226 Difference]: Without dead ends: 423 [2022-07-14 06:26:10,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=65, Invalid=588, Unknown=1, NotChecked=48, Total=702 [2022-07-14 06:26:10,458 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 39 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:26:10,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1021 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 180 Unchecked, 0.4s Time] [2022-07-14 06:26:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-14 06:26:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 394. [2022-07-14 06:26:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 347 states have (on average 1.244956772334294) internal successors, (432), 373 states have internal predecessors, (432), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (27), 17 states have call predecessors, (27), 6 states have call successors, (27) [2022-07-14 06:26:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 465 transitions. [2022-07-14 06:26:10,465 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 465 transitions. Word has length 57 [2022-07-14 06:26:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:26:10,466 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 465 transitions. [2022-07-14 06:26:10,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 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) [2022-07-14 06:26:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 465 transitions. [2022-07-14 06:26:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:26:10,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:26:10,467 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:26:10,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-07-14 06:26:10,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-07-14 06:26:10,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:26:10,879 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:26:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:26:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1768854146, now seen corresponding path program 1 times [2022-07-14 06:26:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:26:10,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940858307] [2022-07-14 06:26:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:10,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:26:10,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:26:10,882 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:26:10,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-07-14 06:26:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:11,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 06:26:11,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:11,539 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 [2022-07-14 06:26:11,625 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 13 treesize of output 9 [2022-07-14 06:26:11,852 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:26:11,852 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 52 treesize of output 51 [2022-07-14 06:26:11,949 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 40 treesize of output 22 [2022-07-14 06:26:12,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:12,694 INFO L356 Elim1Store]: treesize reduction 73, result has 31.1 percent of original size [2022-07-14 06:26:12,695 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 7 case distinctions, treesize of input 34 treesize of output 53 [2022-07-14 06:26:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:26:13,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:26:13,702 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:26:13,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940858307] [2022-07-14 06:26:13,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940858307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:26:13,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1308335938] [2022-07-14 06:26:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:13,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:26:13,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:26:13,703 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:26:13,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-07-14 06:26:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:14,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:26:14,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:14,670 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 [2022-07-14 06:26:15,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:15,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:15,985 INFO L356 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2022-07-14 06:26:15,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 41 [2022-07-14 06:26:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:26:16,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:26:16,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1308335938] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:26:16,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:26:16,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-07-14 06:26:16,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482161307] [2022-07-14 06:26:16,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:26:16,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:26:16,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:26:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:26:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:26:16,429 INFO L87 Difference]: Start difference. First operand 394 states and 465 transitions. Second operand has 17 states, 16 states have (on average 5.375) internal successors, (86), 17 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:26:20,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:26:20,501 INFO L93 Difference]: Finished difference Result 417 states and 489 transitions. [2022-07-14 06:26:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:26:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.375) internal successors, (86), 17 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2022-07-14 06:26:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:26:20,503 INFO L225 Difference]: With dead ends: 417 [2022-07-14 06:26:20,504 INFO L226 Difference]: Without dead ends: 417 [2022-07-14 06:26:20,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:26:20,504 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 42 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:26:20,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 813 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 243 Unchecked, 0.3s Time] [2022-07-14 06:26:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-14 06:26:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 411. [2022-07-14 06:26:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 363 states have (on average 1.2396694214876034) internal successors, (450), 389 states have internal predecessors, (450), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (27), 18 states have call predecessors, (27), 6 states have call successors, (27) [2022-07-14 06:26:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 483 transitions. [2022-07-14 06:26:20,515 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 483 transitions. Word has length 57 [2022-07-14 06:26:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:26:20,516 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 483 transitions. [2022-07-14 06:26:20,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.375) internal successors, (86), 17 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:26:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 483 transitions. [2022-07-14 06:26:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:26:20,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:26:20,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:26:20,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-07-14 06:26:20,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-07-14 06:26:20,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:26:20,928 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:26:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:26:20,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1768854147, now seen corresponding path program 1 times [2022-07-14 06:26:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:26:20,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951357305] [2022-07-14 06:26:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:20,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:26:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:26:20,930 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:26:20,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-07-14 06:26:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:26:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:21,668 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 [2022-07-14 06:26:21,673 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 [2022-07-14 06:26:21,781 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 13 treesize of output 9 [2022-07-14 06:26:22,019 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:26:22,020 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 52 treesize of output 51 [2022-07-14 06:26:22,159 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:26:22,160 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 52 treesize of output 51 [2022-07-14 06:26:22,242 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 40 treesize of output 22 [2022-07-14 06:26:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:22,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:22,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:23,045 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-14 06:26:23,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-07-14 06:26:23,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:23,084 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-14 06:26:23,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 20 [2022-07-14 06:26:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:26:23,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:26:28,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:26:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951357305] [2022-07-14 06:26:28,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951357305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:26:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1091606831] [2022-07-14 06:26:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:28,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:26:28,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:26:28,376 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:26:28,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-07-14 06:26:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:26:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:29,416 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 [2022-07-14 06:26:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:29,517 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 [2022-07-14 06:26:29,814 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 13 treesize of output 9 [2022-07-14 06:26:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:33,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:33,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:26:33,323 INFO L356 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-07-14 06:26:33,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 40 [2022-07-14 06:26:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:26:33,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:26:34,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1091606831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:26:34,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:26:34,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-07-14 06:26:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761656173] [2022-07-14 06:26:34,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:26:34,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 06:26:34,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:26:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 06:26:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=401, Unknown=3, NotChecked=0, Total=462 [2022-07-14 06:26:34,135 INFO L87 Difference]: Start difference. First operand 411 states and 483 transitions. Second operand has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 19 states have internal predecessors, (93), 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) [2022-07-14 06:26:47,329 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:26:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:26:57,506 INFO L93 Difference]: Finished difference Result 414 states and 485 transitions. [2022-07-14 06:26:57,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:26:57,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 19 states have internal predecessors, (93), 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 57 [2022-07-14 06:26:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:26:57,508 INFO L225 Difference]: With dead ends: 414 [2022-07-14 06:26:57,508 INFO L226 Difference]: Without dead ends: 414 [2022-07-14 06:26:57,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=136, Invalid=912, Unknown=8, NotChecked=0, Total=1056 [2022-07-14 06:26:57,509 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 41 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 399 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:26:57,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1220 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 0 Unknown, 399 Unchecked, 0.4s Time] [2022-07-14 06:26:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-14 06:26:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 411. [2022-07-14 06:26:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 363 states have (on average 1.2369146005509641) internal successors, (449), 389 states have internal predecessors, (449), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (27), 18 states have call predecessors, (27), 6 states have call successors, (27) [2022-07-14 06:26:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 482 transitions. [2022-07-14 06:26:57,516 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 482 transitions. Word has length 57 [2022-07-14 06:26:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:26:57,516 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 482 transitions. [2022-07-14 06:26:57,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 19 states have internal predecessors, (93), 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) [2022-07-14 06:26:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 482 transitions. [2022-07-14 06:26:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 06:26:57,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:26:57,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:26:57,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-07-14 06:26:57,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-07-14 06:26:57,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:26:57,918 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:26:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:26:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash 848375861, now seen corresponding path program 1 times [2022-07-14 06:26:57,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:26:57,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561720986] [2022-07-14 06:26:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:26:57,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:26:57,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:26:57,920 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:26:57,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-07-14 06:26:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:26:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:26:58,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:26:58,425 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 13 treesize of output 9 [2022-07-14 06:26:58,464 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 9 [2022-07-14 06:26:58,729 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-07-14 06:26:58,729 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 4 case distinctions, treesize of input 21 treesize of output 37 [2022-07-14 06:26:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:26:58,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:27:00,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:27:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561720986] [2022-07-14 06:27:00,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561720986] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:27:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575682331] [2022-07-14 06:27:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:27:00,886 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:27:00,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:27:00,887 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:27:00,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-07-14 06:27:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:27:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:27:01,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:27:01,798 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 [2022-07-14 06:27:02,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:27:02,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:27:02,445 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:27:02,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 26 [2022-07-14 06:27:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-14 06:27:02,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:27:02,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575682331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:27:02,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:27:02,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-07-14 06:27:02,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009318762] [2022-07-14 06:27:02,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:27:02,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:27:02,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:27:02,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:27:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2022-07-14 06:27:02,518 INFO L87 Difference]: Start difference. First operand 411 states and 482 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 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) [2022-07-14 06:27:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:27:02,870 INFO L93 Difference]: Finished difference Result 432 states and 505 transitions. [2022-07-14 06:27:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:27:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-07-14 06:27:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:27:02,873 INFO L225 Difference]: With dead ends: 432 [2022-07-14 06:27:02,873 INFO L226 Difference]: Without dead ends: 432 [2022-07-14 06:27:02,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=46, Invalid=193, Unknown=1, NotChecked=0, Total=240 [2022-07-14 06:27:02,874 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 10 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:27:02,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 528 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 133 Unchecked, 0.3s Time] [2022-07-14 06:27:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-14 06:27:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 423. [2022-07-14 06:27:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 375 states have (on average 1.232) internal successors, (462), 401 states have internal predecessors, (462), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (24), 18 states have call predecessors, (24), 6 states have call successors, (24) [2022-07-14 06:27:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 492 transitions. [2022-07-14 06:27:02,887 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 492 transitions. Word has length 58 [2022-07-14 06:27:02,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:27:02,887 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 492 transitions. [2022-07-14 06:27:02,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 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) [2022-07-14 06:27:02,887 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 492 transitions. [2022-07-14 06:27:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 06:27:02,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:27:02,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:27:02,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-07-14 06:27:03,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-07-14 06:27:03,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:27:03,289 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:27:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:27:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash 848375862, now seen corresponding path program 1 times [2022-07-14 06:27:03,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:27:03,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699326064] [2022-07-14 06:27:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:27:03,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:27:03,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:27:03,291 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:27:03,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-07-14 06:27:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:27:03,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:27:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:27:03,786 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 [2022-07-14 06:27:03,889 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 13 treesize of output 9 [2022-07-14 06:27:03,942 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 9 [2022-07-14 06:27:04,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:27:04,269 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-14 06:27:04,269 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 2 case distinctions, treesize of input 17 treesize of output 29 [2022-07-14 06:27:04,283 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:27:04,283 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 [2022-07-14 06:27:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:27:04,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:27:10,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:27:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699326064] [2022-07-14 06:27:10,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699326064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:27:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1090665288] [2022-07-14 06:27:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:27:10,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:27:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:27:10,831 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:27:10,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-07-14 06:27:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:27:11,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:27:11,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:27:11,591 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 [2022-07-14 06:27:11,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:27:11,637 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 [2022-07-14 06:27:11,825 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 13 treesize of output 9 [2022-07-14 06:27:12,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:27:12,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:27:12,642 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:27:12,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-07-14 06:27:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-14 06:27:12,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:27:12,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1090665288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:27:12,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:27:12,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2022-07-14 06:27:12,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538761763] [2022-07-14 06:27:12,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:27:12,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:27:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:27:12,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:27:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=256, Unknown=3, NotChecked=0, Total=306 [2022-07-14 06:27:12,819 INFO L87 Difference]: Start difference. First operand 423 states and 492 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 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) [2022-07-14 06:27:13,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:27:13,246 INFO L93 Difference]: Finished difference Result 423 states and 491 transitions. [2022-07-14 06:27:13,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:27:13,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-07-14 06:27:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:27:13,249 INFO L225 Difference]: With dead ends: 423 [2022-07-14 06:27:13,249 INFO L226 Difference]: Without dead ends: 423 [2022-07-14 06:27:13,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=60, Invalid=317, Unknown=3, NotChecked=0, Total=380 [2022-07-14 06:27:13,250 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 13 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:27:13,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 441 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-07-14 06:27:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-07-14 06:27:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 411. [2022-07-14 06:27:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 364 states have (on average 1.2307692307692308) internal successors, (448), 390 states have internal predecessors, (448), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (23), 17 states have call predecessors, (23), 6 states have call successors, (23) [2022-07-14 06:27:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 477 transitions. [2022-07-14 06:27:13,257 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 477 transitions. Word has length 58 [2022-07-14 06:27:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:27:13,257 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 477 transitions. [2022-07-14 06:27:13,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 8 states have internal predecessors, (44), 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) [2022-07-14 06:27:13,258 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 477 transitions. [2022-07-14 06:27:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 06:27:13,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:27:13,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:27:13,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-07-14 06:27:13,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-07-14 06:27:13,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:27:13,671 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:27:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:27:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2094859879, now seen corresponding path program 1 times [2022-07-14 06:27:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:27:13,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344973431] [2022-07-14 06:27:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:27:13,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:27:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:27:13,673 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:27:13,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-07-14 06:27:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:27:14,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:27:14,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:27:14,437 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 [2022-07-14 06:27:15,028 INFO L356 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2022-07-14 06:27:15,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 34 treesize of output 57 [2022-07-14 06:27:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:27:15,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:27:21,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:27:21,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344973431] [2022-07-14 06:27:21,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344973431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:27:21,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1872634254] [2022-07-14 06:27:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:27:21,314 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:27:21,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:27:21,315 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:27:21,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-07-14 06:27:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:27:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:27:22,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:27:22,277 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 [2022-07-14 06:27:39,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:27:39,478 INFO L356 Elim1Store]: treesize reduction 70, result has 34.6 percent of original size [2022-07-14 06:27:39,478 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 5 case distinctions, treesize of input 28 treesize of output 53 [2022-07-14 06:27:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:27:39,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:27:46,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1872634254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:27:46,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:27:46,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-07-14 06:27:46,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643125685] [2022-07-14 06:27:46,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:27:46,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:27:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:27:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:27:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=128, Unknown=14, NotChecked=0, Total=182 [2022-07-14 06:27:46,522 INFO L87 Difference]: Start difference. First operand 411 states and 477 transitions. Second operand has 12 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:27:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:27:47,639 INFO L93 Difference]: Finished difference Result 525 states and 614 transitions. [2022-07-14 06:27:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:27:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 59 [2022-07-14 06:27:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:27:47,641 INFO L225 Difference]: With dead ends: 525 [2022-07-14 06:27:47,641 INFO L226 Difference]: Without dead ends: 525 [2022-07-14 06:27:47,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=62, Invalid=196, Unknown=14, NotChecked=0, Total=272 [2022-07-14 06:27:47,642 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 97 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:27:47,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 614 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 301 Unchecked, 0.2s Time] [2022-07-14 06:27:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-14 06:27:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 434. [2022-07-14 06:27:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 387 states have (on average 1.2299741602067182) internal successors, (476), 413 states have internal predecessors, (476), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (23), 17 states have call predecessors, (23), 6 states have call successors, (23) [2022-07-14 06:27:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 505 transitions. [2022-07-14 06:27:47,650 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 505 transitions. Word has length 59 [2022-07-14 06:27:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:27:47,650 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 505 transitions. [2022-07-14 06:27:47,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:27:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 505 transitions. [2022-07-14 06:27:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 06:27:47,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:27:47,650 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:27:47,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-07-14 06:27:47,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-07-14 06:27:48,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:27:48,051 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_dataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_dataErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 89 more)] === [2022-07-14 06:27:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:27:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2094859878, now seen corresponding path program 1 times [2022-07-14 06:27:48,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:27:48,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735677723] [2022-07-14 06:27:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:27:48,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:27:48,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:27:48,053 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:27:48,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-07-14 06:27:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:27:48,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 06:27:48,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:27:48,793 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 [2022-07-14 06:27:48,799 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 [2022-07-14 06:27:51,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:27:51,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:27:51,200 INFO L356 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-07-14 06:27:51,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 39 [2022-07-14 06:27:51,248 INFO L356 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-07-14 06:27:51,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2022-07-14 06:27:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-14 06:27:51,383 INFO L328 TraceCheckSpWp]: Computing backward predicates...