./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/array-memsafety-realloc/array-realloc-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 a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:46:21,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:46:21,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:46:21,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:46:21,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:46:21,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:46:21,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:46:21,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:46:21,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:46:21,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:46:21,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:46:21,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:46:21,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:46:21,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:46:21,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:46:21,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:46:21,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:46:21,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:46:21,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:46:21,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:46:21,255 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:46:21,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:46:21,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:46:21,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:46:21,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:46:21,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:46:21,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:46:21,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:46:21,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:46:21,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:46:21,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:46:21,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:46:21,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:46:21,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:46:21,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:46:21,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:46:21,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:46:21,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:46:21,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:46:21,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:46:21,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:46:21,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:46:21,273 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:46:21,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:46:21,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:46:21,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:46:21,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:46:21,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:46:21,300 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:46:21,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:46:21,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:46:21,301 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:46:21,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:46:21,302 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:46:21,302 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:46:21,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:46:21,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:46:21,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:46:21,302 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:46:21,303 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:46:21,303 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:46:21,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:46:21,303 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:46:21,304 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:46:21,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:46:21,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:46:21,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:46:21,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:46:21,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:46:21,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:46:21,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:46:21,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:46:21,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:46:21,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 [2022-07-23 05:46:21,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:46:21,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:46:21,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:46:21,547 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:46:21,558 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:46:21,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2022-07-23 05:46:21,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ec964b1/64749faef25a4128a222dff31519f18a/FLAG64fcfd7d5 [2022-07-23 05:46:21,987 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:46:21,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2022-07-23 05:46:22,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ec964b1/64749faef25a4128a222dff31519f18a/FLAG64fcfd7d5 [2022-07-23 05:46:22,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54ec964b1/64749faef25a4128a222dff31519f18a [2022-07-23 05:46:22,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:46:22,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:46:22,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:46:22,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:46:22,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:46:22,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:46:22" (1/1) ... [2022-07-23 05:46:22,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150e4a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:22, skipping insertion in model container [2022-07-23 05:46:22,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:46:22" (1/1) ... [2022-07-23 05:46:22,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:46:22,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:46:22,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:46:22,620 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) [2022-07-23 05:46:22,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a84c172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:22, skipping insertion in model container [2022-07-23 05:46:22,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:46:22,622 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 05:46:22,625 INFO L158 Benchmark]: Toolchain (without parser) took 233.94ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 54.5MB in the beginning and 104.8MB in the end (delta: -50.3MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2022-07-23 05:46:22,626 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 94.4MB. Free memory is still 72.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 05:46:22,627 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.18ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 54.3MB in the beginning and 104.8MB in the end (delta: -50.5MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2022-07-23 05:46:22,628 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 94.4MB. Free memory is still 72.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.18ms. Allocated memory was 94.4MB in the beginning and 127.9MB in the end (delta: 33.6MB). Free memory was 54.3MB in the beginning and 104.8MB in the end (delta: -50.5MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 575]: 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/array-memsafety-realloc/array-realloc-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 a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:46:24,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:46:24,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:46:24,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:46:24,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:46:24,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:46:24,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:46:24,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:46:24,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:46:24,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:46:24,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:46:24,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:46:24,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:46:24,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:46:24,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:46:24,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:46:24,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:46:24,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:46:24,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:46:24,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:46:24,122 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:46:24,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:46:24,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:46:24,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:46:24,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:46:24,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:46:24,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:46:24,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:46:24,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:46:24,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:46:24,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:46:24,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:46:24,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:46:24,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:46:24,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:46:24,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:46:24,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:46:24,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:46:24,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:46:24,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:46:24,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:46:24,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:46:24,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 05:46:24,174 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:46:24,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:46:24,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:46:24,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:46:24,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:46:24,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:46:24,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:46:24,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:46:24,177 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:46:24,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:46:24,178 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:46:24,178 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:46:24,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:46:24,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:46:24,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:46:24,179 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:46:24,179 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:46:24,179 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:46:24,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:46:24,179 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:46:24,180 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 05:46:24,180 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 05:46:24,180 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:46:24,180 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:46:24,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:46:24,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:46:24,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:46:24,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:46:24,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:46:24,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:46:24,182 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 05:46:24,182 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 05:46:24,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 05:46:24,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a27e6fc2049c9dc12360bd8cd7682ef33f4a19a5a5a6c0e7a780c3703a0494b5 [2022-07-23 05:46:24,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:46:24,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:46:24,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:46:24,473 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:46:24,475 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:46:24,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2022-07-23 05:46:24,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a07d5a52/8f5a9926c02e42ce8385419db3ba60cc/FLAGfe08aa517 [2022-07-23 05:46:24,906 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:46:24,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety-realloc/array-realloc-2.i [2022-07-23 05:46:24,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a07d5a52/8f5a9926c02e42ce8385419db3ba60cc/FLAGfe08aa517 [2022-07-23 05:46:24,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a07d5a52/8f5a9926c02e42ce8385419db3ba60cc [2022-07-23 05:46:24,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:46:24,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:46:24,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:46:24,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:46:24,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:46:24,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:46:24" (1/1) ... [2022-07-23 05:46:24,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64786c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:24, skipping insertion in model container [2022-07-23 05:46:24,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:46:24" (1/1) ... [2022-07-23 05:46:24,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:46:24,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:46:25,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:46:25,260 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 05:46:25,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:46:25,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:46:25,295 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:46:25,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:46:25,346 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:46:25,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25 WrapperNode [2022-07-23 05:46:25,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:46:25,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:46:25,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:46:25,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:46:25,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,393 INFO L137 Inliner]: procedures = 120, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2022-07-23 05:46:25,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:46:25,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:46:25,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:46:25,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:46:25,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:46:25,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:46:25,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:46:25,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:46:25,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (1/1) ... [2022-07-23 05:46:25,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:46:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:46:25,452 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) [2022-07-23 05:46:25,453 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 [2022-07-23 05:46:25,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 05:46:25,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:46:25,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 05:46:25,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 05:46:25,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:46:25,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-23 05:46:25,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 05:46:25,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:46:25,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:46:25,613 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:46:25,614 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:46:25,848 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:46:25,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:46:25,851 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-23 05:46:25,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:46:25 BoogieIcfgContainer [2022-07-23 05:46:25,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:46:25,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:46:25,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:46:25,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:46:25,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:46:24" (1/3) ... [2022-07-23 05:46:25,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26732f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:46:25, skipping insertion in model container [2022-07-23 05:46:25,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:46:25" (2/3) ... [2022-07-23 05:46:25,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26732f64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:46:25, skipping insertion in model container [2022-07-23 05:46:25,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:46:25" (3/3) ... [2022-07-23 05:46:25,858 INFO L111 eAbstractionObserver]: Analyzing ICFG array-realloc-2.i [2022-07-23 05:46:25,866 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:46:25,868 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-07-23 05:46:25,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:46:25,905 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@72876b49, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@67fcde95 [2022-07-23 05:46:25,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-07-23 05:46:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 35 states have internal predecessors, (41), 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) [2022-07-23 05:46:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-23 05:46:25,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:25,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-23 05:46:25,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:25,916 INFO L85 PathProgramCache]: Analyzing trace with hash 925662, now seen corresponding path program 1 times [2022-07-23 05:46:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:25,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049972611] [2022-07-23 05:46:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:25,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:25,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:25,937 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) [2022-07-23 05:46:25,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 05:46:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:26,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 05:46:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:26,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:26,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049972611] [2022-07-23 05:46:26,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049972611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:26,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:26,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:46:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984356020] [2022-07-23 05:46:26,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:26,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:46:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:46:26,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:46:26,060 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 35 states have internal predecessors, (41), 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-07-23 05:46:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:26,131 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-07-23 05:46:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:46:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2022-07-23 05:46:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:26,137 INFO L225 Difference]: With dead ends: 37 [2022-07-23 05:46:26,137 INFO L226 Difference]: Without dead ends: 34 [2022-07-23 05:46:26,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:46:26,141 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:26,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-23 05:46:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-23 05:46:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.85) internal successors, (37), 33 states have internal predecessors, (37), 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) [2022-07-23 05:46:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-07-23 05:46:26,159 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 4 [2022-07-23 05:46:26,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:26,160 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-07-23 05:46:26,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-07-23 05:46:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-07-23 05:46:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-23 05:46:26,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:26,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-23 05:46:26,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-23 05:46:26,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:26,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2022-07-23 05:46:26,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:26,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [880666414] [2022-07-23 05:46:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:26,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:26,371 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) [2022-07-23 05:46:26,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 05:46:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:26,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:46:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:26,465 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 13 treesize of output 9 [2022-07-23 05:46:26,477 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 05:46:26,477 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 [2022-07-23 05:46:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:26,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:26,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:26,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [880666414] [2022-07-23 05:46:26,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [880666414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:26,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:26,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:46:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094784285] [2022-07-23 05:46:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:26,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:46:26,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:46:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:46:26,505 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-07-23 05:46:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:26,622 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-07-23 05:46:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:46:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2022-07-23 05:46:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:26,623 INFO L225 Difference]: With dead ends: 51 [2022-07-23 05:46:26,623 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:46:26,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:46:26,624 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:26,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:46:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2022-07-23 05:46:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 43 states have internal predecessors, (57), 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) [2022-07-23 05:46:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2022-07-23 05:46:26,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 4 [2022-07-23 05:46:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:26,629 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2022-07-23 05:46:26,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-07-23 05:46:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2022-07-23 05:46:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-23 05:46:26,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:26,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-23 05:46:26,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:26,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:26,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:26,831 INFO L85 PathProgramCache]: Analyzing trace with hash 925670, now seen corresponding path program 1 times [2022-07-23 05:46:26,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388347185] [2022-07-23 05:46:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:26,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:26,833 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) [2022-07-23 05:46:26,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 05:46:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:26,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:46:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:26,891 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 13 treesize of output 9 [2022-07-23 05:46:26,905 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:46:26,905 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 11 [2022-07-23 05:46:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:26,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:26,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:26,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388347185] [2022-07-23 05:46:26,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388347185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:26,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:26,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:46:26,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414980052] [2022-07-23 05:46:26,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:26,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:46:26,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:46:26,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:46:26,928 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-07-23 05:46:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:26,992 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-07-23 05:46:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:46:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2022-07-23 05:46:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:26,995 INFO L225 Difference]: With dead ends: 58 [2022-07-23 05:46:26,995 INFO L226 Difference]: Without dead ends: 58 [2022-07-23 05:46:26,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:46:26,996 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:26,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-23 05:46:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2022-07-23 05:46:27,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 46 states have internal predecessors, (61), 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) [2022-07-23 05:46:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-07-23 05:46:27,006 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 4 [2022-07-23 05:46:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:27,006 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-07-23 05:46:27,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-07-23 05:46:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-07-23 05:46:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:46:27,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:27,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:46:27,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:27,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:27,216 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash 889567415, now seen corresponding path program 1 times [2022-07-23 05:46:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:27,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633762416] [2022-07-23 05:46:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:27,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:27,220 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) [2022-07-23 05:46:27,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 05:46:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:46:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:27,285 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 [2022-07-23 05:46:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:27,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:27,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:27,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633762416] [2022-07-23 05:46:27,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633762416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:27,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:27,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:46:27,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127073464] [2022-07-23 05:46:27,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:27,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:46:27,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:27,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:46:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:27,292 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:27,400 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-23 05:46:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:46:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-23 05:46:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:27,402 INFO L225 Difference]: With dead ends: 66 [2022-07-23 05:46:27,402 INFO L226 Difference]: Without dead ends: 66 [2022-07-23 05:46:27,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:46:27,403 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:27,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 87 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-23 05:46:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2022-07-23 05:46:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 46 states have internal predecessors, (60), 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) [2022-07-23 05:46:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-07-23 05:46:27,406 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 6 [2022-07-23 05:46:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:27,407 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-07-23 05:46:27,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-07-23 05:46:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:46:27,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:27,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:27,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:27,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:27,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1806786797, now seen corresponding path program 1 times [2022-07-23 05:46:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:27,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872984671] [2022-07-23 05:46:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:27,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:27,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:27,612 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) [2022-07-23 05:46:27,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 05:46:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:27,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:46:27,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:27,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:27,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872984671] [2022-07-23 05:46:27,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872984671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:27,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:27,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:46:27,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643598042] [2022-07-23 05:46:27,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:27,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:46:27,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:46:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:27,673 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-07-23 05:46:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:27,801 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-07-23 05:46:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:46:27,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-07-23 05:46:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:27,803 INFO L225 Difference]: With dead ends: 68 [2022-07-23 05:46:27,803 INFO L226 Difference]: Without dead ends: 68 [2022-07-23 05:46:27,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:46:27,804 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:27,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 53 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-23 05:46:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2022-07-23 05:46:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 49 states have internal predecessors, (65), 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) [2022-07-23 05:46:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-23 05:46:27,809 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 7 [2022-07-23 05:46:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:27,809 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-23 05:46:27,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-07-23 05:46:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-23 05:46:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:46:27,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:27,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:27,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-23 05:46:28,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:28,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:28,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1806786798, now seen corresponding path program 1 times [2022-07-23 05:46:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:28,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457403013] [2022-07-23 05:46:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:28,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:28,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:28,019 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) [2022-07-23 05:46:28,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 05:46:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:28,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:46:28,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:28,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:28,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:28,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457403013] [2022-07-23 05:46:28,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457403013] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:28,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:28,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:46:28,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613896189] [2022-07-23 05:46:28,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:28,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:46:28,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:28,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:46:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:46:28,121 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-07-23 05:46:28,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:28,204 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-07-23 05:46:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:46:28,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2022-07-23 05:46:28,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:28,205 INFO L225 Difference]: With dead ends: 61 [2022-07-23 05:46:28,205 INFO L226 Difference]: Without dead ends: 61 [2022-07-23 05:46:28,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:46:28,207 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:28,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 55 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-23 05:46:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2022-07-23 05:46:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.65) internal successors, (66), 50 states have internal predecessors, (66), 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) [2022-07-23 05:46:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-07-23 05:46:28,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 7 [2022-07-23 05:46:28,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:28,213 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-07-23 05:46:28,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-07-23 05:46:28,213 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-07-23 05:46:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:46:28,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:28,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:28,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-23 05:46:28,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:28,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:28,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1454266352, now seen corresponding path program 1 times [2022-07-23 05:46:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:28,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282001681] [2022-07-23 05:46:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:28,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:28,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:28,423 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) [2022-07-23 05:46:28,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 05:46:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:46:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:28,479 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 [2022-07-23 05:46:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:28,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:28,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282001681] [2022-07-23 05:46:28,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282001681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:28,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:28,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:46:28,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995408348] [2022-07-23 05:46:28,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:28,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:46:28,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:28,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:46:28,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:28,492 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-07-23 05:46:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:28,573 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-07-23 05:46:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:46:28,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2022-07-23 05:46:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:28,574 INFO L225 Difference]: With dead ends: 66 [2022-07-23 05:46:28,574 INFO L226 Difference]: Without dead ends: 66 [2022-07-23 05:46:28,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:46:28,574 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:28,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-23 05:46:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2022-07-23 05:46:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 57 states have internal predecessors, (76), 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) [2022-07-23 05:46:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-07-23 05:46:28,578 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 10 [2022-07-23 05:46:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:28,578 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-07-23 05:46:28,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-07-23 05:46:28,578 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-07-23 05:46:28,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:46:28,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:28,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:28,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:28,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2132584042, now seen corresponding path program 1 times [2022-07-23 05:46:28,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:28,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253206897] [2022-07-23 05:46:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:28,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:28,786 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) [2022-07-23 05:46:28,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 05:46:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:28,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:46:28,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:28,877 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 23 treesize of output 11 [2022-07-23 05:46:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:28,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:28,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253206897] [2022-07-23 05:46:28,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253206897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:28,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:28,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:46:28,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686088932] [2022-07-23 05:46:28,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:28,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:46:28,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:46:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:46:28,893 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-23 05:46:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:29,005 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-07-23 05:46:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:46:29,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-07-23 05:46:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:29,006 INFO L225 Difference]: With dead ends: 65 [2022-07-23 05:46:29,006 INFO L226 Difference]: Without dead ends: 65 [2022-07-23 05:46:29,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:46:29,007 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:29,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 69 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-23 05:46:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-07-23 05:46:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 58 states have internal predecessors, (77), 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) [2022-07-23 05:46:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-07-23 05:46:29,011 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 11 [2022-07-23 05:46:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:29,011 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-07-23 05:46:29,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-23 05:46:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-07-23 05:46:29,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:46:29,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:29,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:29,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-23 05:46:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:29,219 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1685595954, now seen corresponding path program 1 times [2022-07-23 05:46:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:29,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30604843] [2022-07-23 05:46:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:29,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:29,220 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) [2022-07-23 05:46:29,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 05:46:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:29,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:46:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:29,270 INFO L356 Elim1Store]: treesize reduction 12, result has 57.1 percent of original size [2022-07-23 05:46:29,271 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 13 treesize of output 26 [2022-07-23 05:46:29,304 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 [2022-07-23 05:46:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:29,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:29,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30604843] [2022-07-23 05:46:29,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30604843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:29,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:29,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:46:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282757308] [2022-07-23 05:46:29,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:29,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:46:29,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:29,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:46:29,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:29,316 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 05:46:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:29,420 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2022-07-23 05:46:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:46:29,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-07-23 05:46:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:29,420 INFO L225 Difference]: With dead ends: 64 [2022-07-23 05:46:29,421 INFO L226 Difference]: Without dead ends: 64 [2022-07-23 05:46:29,421 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 [2022-07-23 05:46:29,421 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:29,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-23 05:46:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-07-23 05:46:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 59 states have internal predecessors, (78), 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) [2022-07-23 05:46:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2022-07-23 05:46:29,424 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 12 [2022-07-23 05:46:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:29,424 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2022-07-23 05:46:29,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 05:46:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2022-07-23 05:46:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:46:29,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:29,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:29,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:29,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:29,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1602458348, now seen corresponding path program 1 times [2022-07-23 05:46:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358166254] [2022-07-23 05:46:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:29,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:29,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:29,633 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) [2022-07-23 05:46:29,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 05:46:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:29,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:46:29,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:29,692 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 05:46:29,692 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 [2022-07-23 05:46:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:29,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:29,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358166254] [2022-07-23 05:46:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358166254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:29,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:29,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:46:29,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18785798] [2022-07-23 05:46:29,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:29,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:46:29,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:29,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:46:29,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:29,707 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 05:46:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:29,770 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2022-07-23 05:46:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:46:29,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-07-23 05:46:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:29,770 INFO L225 Difference]: With dead ends: 62 [2022-07-23 05:46:29,771 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 05:46:29,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:46:29,771 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:29,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 05:46:29,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-07-23 05:46:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.530612244897959) internal successors, (75), 58 states have internal predecessors, (75), 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) [2022-07-23 05:46:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2022-07-23 05:46:29,774 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 12 [2022-07-23 05:46:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:29,774 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2022-07-23 05:46:29,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-23 05:46:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2022-07-23 05:46:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:46:29,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:29,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:29,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:29,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:29,981 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1602458347, now seen corresponding path program 1 times [2022-07-23 05:46:29,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:29,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064475972] [2022-07-23 05:46:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:29,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:29,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:29,983 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) [2022-07-23 05:46:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 05:46:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:46:30,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:30,075 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 8 treesize of output 7 [2022-07-23 05:46:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:30,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:30,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064475972] [2022-07-23 05:46:30,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064475972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:30,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:30,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:46:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247494733] [2022-07-23 05:46:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:30,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:46:30,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:46:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:46:30,121 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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) [2022-07-23 05:46:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:30,244 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-07-23 05:46:30,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:46:30,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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 12 [2022-07-23 05:46:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:30,248 INFO L225 Difference]: With dead ends: 90 [2022-07-23 05:46:30,248 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 05:46:30,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:46:30,249 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 73 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:30,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 79 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 05:46:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-07-23 05:46:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.509433962264151) internal successors, (80), 62 states have internal predecessors, (80), 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) [2022-07-23 05:46:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2022-07-23 05:46:30,252 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 12 [2022-07-23 05:46:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:30,252 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2022-07-23 05:46:30,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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) [2022-07-23 05:46:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2022-07-23 05:46:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:46:30,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:30,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:30,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:30,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:30,461 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash 713867117, now seen corresponding path program 1 times [2022-07-23 05:46:30,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:30,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138107982] [2022-07-23 05:46:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:30,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:30,463 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) [2022-07-23 05:46:30,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 05:46:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:30,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:46:30,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:30,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:30,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:30,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138107982] [2022-07-23 05:46:30,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138107982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:30,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:30,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:46:30,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726744392] [2022-07-23 05:46:30,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:46:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:46:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:30,542 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-23 05:46:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:30,572 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2022-07-23 05:46:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:46:30,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-07-23 05:46:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:30,573 INFO L225 Difference]: With dead ends: 60 [2022-07-23 05:46:30,573 INFO L226 Difference]: Without dead ends: 60 [2022-07-23 05:46:30,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:30,573 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:30,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 53 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:46:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-23 05:46:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-23 05:46:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.52) internal successors, (76), 59 states have internal predecessors, (76), 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) [2022-07-23 05:46:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-07-23 05:46:30,576 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2022-07-23 05:46:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:30,576 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-07-23 05:46:30,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-23 05:46:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-07-23 05:46:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:46:30,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:30,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:30,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:30,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:30,783 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1863398776, now seen corresponding path program 1 times [2022-07-23 05:46:30,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:30,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431227650] [2022-07-23 05:46:30,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:30,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:30,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:30,784 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) [2022-07-23 05:46:30,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 05:46:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:30,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:46:30,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:30,870 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 13 [2022-07-23 05:46:30,906 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 [2022-07-23 05:46:30,976 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-23 05:46:30,977 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-23 05:46:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:31,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:31,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:31,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431227650] [2022-07-23 05:46:31,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431227650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:31,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:31,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:46:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990185896] [2022-07-23 05:46:31,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:46:31,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:46:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:46:31,062 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2022-07-23 05:46:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:31,374 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2022-07-23 05:46:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:46:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 13 [2022-07-23 05:46:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:31,375 INFO L225 Difference]: With dead ends: 90 [2022-07-23 05:46:31,375 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 05:46:31,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:46:31,376 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 70 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:31,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 175 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-07-23 05:46:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 05:46:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2022-07-23 05:46:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.52) internal successors, (76), 59 states have internal predecessors, (76), 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) [2022-07-23 05:46:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-07-23 05:46:31,378 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2022-07-23 05:46:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:31,378 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-07-23 05:46:31,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2022-07-23 05:46:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-07-23 05:46:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:46:31,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:31,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:31,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-23 05:46:31,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:31,586 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:31,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1863398777, now seen corresponding path program 1 times [2022-07-23 05:46:31,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:31,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465273298] [2022-07-23 05:46:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:31,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:31,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:31,588 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) [2022-07-23 05:46:31,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 05:46:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:31,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:46:31,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:31,683 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 05:46:31,684 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 13 treesize of output 23 [2022-07-23 05:46:31,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-23 05:46:31,772 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:31,773 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 14 treesize of output 20 [2022-07-23 05:46:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:31,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:31,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465273298] [2022-07-23 05:46:31,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465273298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:31,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:31,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:46:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650953718] [2022-07-23 05:46:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:46:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:46:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:46:31,837 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2022-07-23 05:46:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:32,071 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-07-23 05:46:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:46:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 13 [2022-07-23 05:46:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:32,072 INFO L225 Difference]: With dead ends: 86 [2022-07-23 05:46:32,072 INFO L226 Difference]: Without dead ends: 86 [2022-07-23 05:46:32,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:46:32,073 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:32,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 143 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-07-23 05:46:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-23 05:46:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2022-07-23 05:46:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.5) internal successors, (84), 65 states have internal predecessors, (84), 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) [2022-07-23 05:46:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2022-07-23 05:46:32,075 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 13 [2022-07-23 05:46:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:32,076 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2022-07-23 05:46:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2022-07-23 05:46:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2022-07-23 05:46:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:46:32,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:32,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:32,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:32,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1863406910, now seen corresponding path program 1 times [2022-07-23 05:46:32,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:32,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028179062] [2022-07-23 05:46:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:32,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:32,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:32,285 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) [2022-07-23 05:46:32,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 05:46:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:46:32,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:32,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:32,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:32,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028179062] [2022-07-23 05:46:32,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028179062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:32,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:32,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:46:32,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720216644] [2022-07-23 05:46:32,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:32,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:46:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:32,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:46:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:32,351 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-23 05:46:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:32,390 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-07-23 05:46:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:46:32,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-07-23 05:46:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:32,391 INFO L225 Difference]: With dead ends: 61 [2022-07-23 05:46:32,391 INFO L226 Difference]: Without dead ends: 61 [2022-07-23 05:46:32,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:46:32,391 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:32,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:46:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-23 05:46:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-23 05:46:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 60 states have internal predecessors, (73), 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) [2022-07-23 05:46:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-23 05:46:32,393 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 13 [2022-07-23 05:46:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:32,393 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-23 05:46:32,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-07-23 05:46:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-23 05:46:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:46:32,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:32,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:32,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:32,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:32,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:32,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1879468086, now seen corresponding path program 1 times [2022-07-23 05:46:32,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:32,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86622194] [2022-07-23 05:46:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:32,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:32,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:32,596 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) [2022-07-23 05:46:32,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 05:46:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:32,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:46:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:32,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:32,705 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:46:32,706 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 11 [2022-07-23 05:46:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:32,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:32,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86622194] [2022-07-23 05:46:32,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86622194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:32,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:32,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-23 05:46:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668350348] [2022-07-23 05:46:32,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:32,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:46:32,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:32,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:46:32,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:46:32,718 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-07-23 05:46:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:32,771 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-23 05:46:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:46:32,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-07-23 05:46:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:32,772 INFO L225 Difference]: With dead ends: 62 [2022-07-23 05:46:32,772 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 05:46:32,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:46:32,773 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:32,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:46:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 05:46:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2022-07-23 05:46:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 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) [2022-07-23 05:46:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-07-23 05:46:32,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 17 [2022-07-23 05:46:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:32,775 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-07-23 05:46:32,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-07-23 05:46:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-07-23 05:46:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:46:32,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:32,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:32,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:32,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:32,983 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:32,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1879468087, now seen corresponding path program 1 times [2022-07-23 05:46:32,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:32,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210498770] [2022-07-23 05:46:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:32,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:32,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:32,985 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) [2022-07-23 05:46:32,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 05:46:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:33,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:46:33,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:33,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:33,175 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:46:33,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-07-23 05:46:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:33,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:33,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210498770] [2022-07-23 05:46:33,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210498770] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:33,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:33,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-23 05:46:33,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709823731] [2022-07-23 05:46:33,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:33,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:46:33,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:46:33,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:46:33,301 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-07-23 05:46:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:33,368 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-07-23 05:46:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:46:33,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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 17 [2022-07-23 05:46:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:33,369 INFO L225 Difference]: With dead ends: 41 [2022-07-23 05:46:33,369 INFO L226 Difference]: Without dead ends: 41 [2022-07-23 05:46:33,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:46:33,370 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:33,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 26 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-23 05:46:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-07-23 05:46:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 38 states have internal predecessors, (43), 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) [2022-07-23 05:46:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-07-23 05:46:33,371 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 17 [2022-07-23 05:46:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:33,371 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-07-23 05:46:33,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-07-23 05:46:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-07-23 05:46:33,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:46:33,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:33,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:33,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:33,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:33,572 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1866031452, now seen corresponding path program 1 times [2022-07-23 05:46:33,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:33,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343465000] [2022-07-23 05:46:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:33,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:33,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:33,574 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) [2022-07-23 05:46:33,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 05:46:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:46:33,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:33,723 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 [2022-07-23 05:46:33,735 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 [2022-07-23 05:46:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:33,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:33,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-23 05:46:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:33,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:33,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343465000] [2022-07-23 05:46:33,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343465000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:33,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:33,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-23 05:46:33,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651297148] [2022-07-23 05:46:33,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:33,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:46:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:33,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:46:33,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:46:33,801 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-07-23 05:46:33,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:33,955 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-07-23 05:46:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:46:33,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 18 [2022-07-23 05:46:33,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:33,956 INFO L225 Difference]: With dead ends: 42 [2022-07-23 05:46:33,956 INFO L226 Difference]: Without dead ends: 42 [2022-07-23 05:46:33,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:46:33,956 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:33,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 36 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-23 05:46:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-07-23 05:46:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.3125) internal successors, (42), 37 states have internal predecessors, (42), 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) [2022-07-23 05:46:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-23 05:46:33,958 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18 [2022-07-23 05:46:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:33,958 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-23 05:46:33,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-07-23 05:46:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-23 05:46:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 05:46:33,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:33,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:33,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:34,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:34,159 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:34,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2012400074, now seen corresponding path program 1 times [2022-07-23 05:46:34,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:34,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111875023] [2022-07-23 05:46:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:34,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:34,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:34,161 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) [2022-07-23 05:46:34,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 05:46:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:34,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:46:34,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:34,270 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 [2022-07-23 05:46:34,461 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 [2022-07-23 05:46:34,509 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 [2022-07-23 05:46:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:34,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:34,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-23 05:46:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:34,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:34,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111875023] [2022-07-23 05:46:34,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111875023] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:34,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:34,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-07-23 05:46:34,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333671725] [2022-07-23 05:46:34,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:34,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:46:34,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:34,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:46:34,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:46:34,678 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-07-23 05:46:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:34,700 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-07-23 05:46:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:46:34,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 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 19 [2022-07-23 05:46:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:34,701 INFO L225 Difference]: With dead ends: 49 [2022-07-23 05:46:34,701 INFO L226 Difference]: Without dead ends: 49 [2022-07-23 05:46:34,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:46:34,702 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:34,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 104 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-07-23 05:46:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-23 05:46:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-23 05:46:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 47 states have internal predecessors, (53), 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) [2022-07-23 05:46:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-23 05:46:34,703 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 19 [2022-07-23 05:46:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:34,703 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-23 05:46:34,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-07-23 05:46:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-23 05:46:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-23 05:46:34,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:34,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:34,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-07-23 05:46:34,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:34,905 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1581502644, now seen corresponding path program 1 times [2022-07-23 05:46:34,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:34,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902510782] [2022-07-23 05:46:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:34,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:34,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:34,906 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:34,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 05:46:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:34,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:46:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:34,997 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 [2022-07-23 05:46:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:35,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:46:35,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:35,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902510782] [2022-07-23 05:46:35,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902510782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:46:35,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:46:35,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:46:35,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362522862] [2022-07-23 05:46:35,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:46:35,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:46:35,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:35,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:46:35,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:46:35,008 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:35,100 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-07-23 05:46:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:46:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 19 [2022-07-23 05:46:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:35,101 INFO L225 Difference]: With dead ends: 50 [2022-07-23 05:46:35,101 INFO L226 Difference]: Without dead ends: 50 [2022-07-23 05:46:35,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:46:35,102 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:35,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:46:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-23 05:46:35,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-07-23 05:46:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.263157894736842) internal successors, (48), 43 states have internal predecessors, (48), 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) [2022-07-23 05:46:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-07-23 05:46:35,103 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 19 [2022-07-23 05:46:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:35,103 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-07-23 05:46:35,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:46:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-07-23 05:46:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:46:35,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:35,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:35,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:35,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:35,304 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:35,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2040107238, now seen corresponding path program 1 times [2022-07-23 05:46:35,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:35,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389486414] [2022-07-23 05:46:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:35,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:35,306 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) [2022-07-23 05:46:35,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 05:46:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:46:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:35,413 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 05:46:35,414 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 [2022-07-23 05:46:35,453 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 [2022-07-23 05:46:35,466 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 [2022-07-23 05:46:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:35,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:35,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-23 05:46:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:35,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389486414] [2022-07-23 05:46:35,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389486414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:35,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:35,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-23 05:46:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668127730] [2022-07-23 05:46:35,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:35,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:46:35,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:46:35,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:46:35,604 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-07-23 05:46:35,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:35,782 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-07-23 05:46:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:46:35,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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 20 [2022-07-23 05:46:35,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:35,783 INFO L225 Difference]: With dead ends: 44 [2022-07-23 05:46:35,783 INFO L226 Difference]: Without dead ends: 44 [2022-07-23 05:46:35,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:46:35,784 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:35,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-07-23 05:46:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-23 05:46:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-07-23 05:46:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.236842105263158) internal successors, (47), 42 states have internal predecessors, (47), 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) [2022-07-23 05:46:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-07-23 05:46:35,797 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 20 [2022-07-23 05:46:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:35,797 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-07-23 05:46:35,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-07-23 05:46:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-07-23 05:46:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:46:35,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:35,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:35,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:36,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:36,009 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:36,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1247947063, now seen corresponding path program 1 times [2022-07-23 05:46:36,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:36,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885116274] [2022-07-23 05:46:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:36,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:36,011 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) [2022-07-23 05:46:36,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 05:46:36,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:46:36,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:36,134 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 8 treesize of output 7 [2022-07-23 05:46:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:36,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:36,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:36,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885116274] [2022-07-23 05:46:36,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885116274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:36,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:36,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-23 05:46:36,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933385264] [2022-07-23 05:46:36,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:36,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:46:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:46:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:46:36,476 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 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) [2022-07-23 05:46:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:37,729 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2022-07-23 05:46:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:46:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 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 20 [2022-07-23 05:46:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:37,732 INFO L225 Difference]: With dead ends: 138 [2022-07-23 05:46:37,732 INFO L226 Difference]: Without dead ends: 138 [2022-07-23 05:46:37,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:46:37,733 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 403 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:37,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 110 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:46:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-23 05:46:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 88. [2022-07-23 05:46:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.3012048192771084) internal successors, (108), 87 states have internal predecessors, (108), 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) [2022-07-23 05:46:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-07-23 05:46:37,735 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 20 [2022-07-23 05:46:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:37,735 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-07-23 05:46:37,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 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) [2022-07-23 05:46:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-07-23 05:46:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:46:37,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:37,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:37,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:37,945 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1181184967, now seen corresponding path program 1 times [2022-07-23 05:46:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:37,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218323921] [2022-07-23 05:46:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:37,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:37,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:37,947 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) [2022-07-23 05:46:37,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 05:46:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:38,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 05:46:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:38,171 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-23 05:46:38,342 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 [2022-07-23 05:46:42,480 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 39 treesize of output 27 [2022-07-23 05:46:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:44,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:44,651 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 48 treesize of output 44 [2022-07-23 05:46:49,455 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 35 treesize of output 27 [2022-07-23 05:46:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:49,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:49,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218323921] [2022-07-23 05:46:49,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218323921] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:49,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:49,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-07-23 05:46:49,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355431531] [2022-07-23 05:46:49,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:49,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:46:49,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:49,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:46:49,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=324, Unknown=4, NotChecked=0, Total=380 [2022-07-23 05:46:49,526 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 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) [2022-07-23 05:46:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:49,538 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-07-23 05:46:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:46:49,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 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 21 [2022-07-23 05:46:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:49,539 INFO L225 Difference]: With dead ends: 90 [2022-07-23 05:46:49,539 INFO L226 Difference]: Without dead ends: 83 [2022-07-23 05:46:49,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=52, Invalid=324, Unknown=4, NotChecked=0, Total=380 [2022-07-23 05:46:49,540 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:49,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 74 Unchecked, 0.0s Time] [2022-07-23 05:46:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-23 05:46:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-07-23 05:46:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.3076923076923077) internal successors, (102), 82 states have internal predecessors, (102), 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) [2022-07-23 05:46:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2022-07-23 05:46:49,542 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 21 [2022-07-23 05:46:49,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:49,542 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2022-07-23 05:46:49,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 20 states have internal predecessors, (41), 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) [2022-07-23 05:46:49,542 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2022-07-23 05:46:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:46:49,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:49,543 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:49,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:49,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:49,750 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash -31653308, now seen corresponding path program 1 times [2022-07-23 05:46:49,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:49,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616632752] [2022-07-23 05:46:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:49,752 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) [2022-07-23 05:46:49,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 05:46:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:49,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:46:49,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:49,912 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 05:46:49,913 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 [2022-07-23 05:46:49,962 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 [2022-07-23 05:46:50,000 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 [2022-07-23 05:46:50,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:46:50,109 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-23 05:46:50,109 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-23 05:46:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:50,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:50,620 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 166 treesize of output 160 [2022-07-23 05:46:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:50,718 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:50,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616632752] [2022-07-23 05:46:50,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616632752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:50,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:50,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-07-23 05:46:50,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474848851] [2022-07-23 05:46:50,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:50,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 05:46:50,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:50,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 05:46:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:46:50,719 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 states have internal predecessors, (40), 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) [2022-07-23 05:46:50,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:50,834 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2022-07-23 05:46:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:46:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 states have internal predecessors, (40), 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 21 [2022-07-23 05:46:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:50,835 INFO L225 Difference]: With dead ends: 83 [2022-07-23 05:46:50,836 INFO L226 Difference]: Without dead ends: 83 [2022-07-23 05:46:50,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:46:50,836 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:50,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 107 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 48 Unchecked, 0.0s Time] [2022-07-23 05:46:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-23 05:46:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-07-23 05:46:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 78 states have internal predecessors, (96), 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) [2022-07-23 05:46:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-07-23 05:46:50,838 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 21 [2022-07-23 05:46:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:50,838 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-07-23 05:46:50,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 states have internal predecessors, (40), 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) [2022-07-23 05:46:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-07-23 05:46:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:46:50,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:50,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:50,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-23 05:46:51,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:51,043 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:51,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:51,044 INFO L85 PathProgramCache]: Analyzing trace with hash -31653307, now seen corresponding path program 1 times [2022-07-23 05:46:51,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:51,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759609585] [2022-07-23 05:46:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:46:51,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:51,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:51,045 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:51,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 05:46:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:46:51,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:46:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:51,344 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:46:51,344 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 14 treesize of output 20 [2022-07-23 05:46:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:51,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:51,858 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 41 treesize of output 37 [2022-07-23 05:46:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:46:52,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:52,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759609585] [2022-07-23 05:46:52,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759609585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:52,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:52,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-23 05:46:52,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587450689] [2022-07-23 05:46:52,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:52,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:46:52,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:52,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:46:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:46:52,081 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 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) [2022-07-23 05:46:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:53,278 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-07-23 05:46:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:46:53,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 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 21 [2022-07-23 05:46:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:53,279 INFO L225 Difference]: With dead ends: 105 [2022-07-23 05:46:53,279 INFO L226 Difference]: Without dead ends: 105 [2022-07-23 05:46:53,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:46:53,280 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:53,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 145 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-07-23 05:46:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-23 05:46:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-07-23 05:46:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.2804878048780488) internal successors, (105), 86 states have internal predecessors, (105), 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) [2022-07-23 05:46:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2022-07-23 05:46:53,282 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 21 [2022-07-23 05:46:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:53,282 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2022-07-23 05:46:53,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 17 states have internal predecessors, (40), 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) [2022-07-23 05:46:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2022-07-23 05:46:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:46:53,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:53,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:53,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:53,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:53,491 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:53,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:53,491 INFO L85 PathProgramCache]: Analyzing trace with hash 25639426, now seen corresponding path program 2 times [2022-07-23 05:46:53,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:53,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275780742] [2022-07-23 05:46:53,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:46:53,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:53,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:53,492 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) [2022-07-23 05:46:53,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 05:46:53,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:46:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:53,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:46:53,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:53,700 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 [2022-07-23 05:46:53,716 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 [2022-07-23 05:46:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:46:53,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:46:53,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-07-23 05:46:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:46:53,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:46:53,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275780742] [2022-07-23 05:46:53,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275780742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:46:53,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:46:53,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-23 05:46:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640174987] [2022-07-23 05:46:53,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:46:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:46:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:46:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:46:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:46:53,798 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-07-23 05:46:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:46:54,055 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2022-07-23 05:46:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:46:54,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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 27 [2022-07-23 05:46:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:46:54,056 INFO L225 Difference]: With dead ends: 90 [2022-07-23 05:46:54,057 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 05:46:54,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:46:54,057 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:46:54,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:46:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 05:46:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-07-23 05:46:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 85 states have internal predecessors, (104), 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) [2022-07-23 05:46:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-07-23 05:46:54,059 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 27 [2022-07-23 05:46:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:46:54,059 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-07-23 05:46:54,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-07-23 05:46:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-07-23 05:46:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:46:54,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:46:54,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:46:54,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-23 05:46:54,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:46:54,260 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:46:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:46:54,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312443, now seen corresponding path program 2 times [2022-07-23 05:46:54,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:46:54,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308146675] [2022-07-23 05:46:54,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:46:54,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:46:54,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:46:54,261 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:46:54,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 05:46:54,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:46:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:46:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-23 05:46:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:46:54,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-23 05:46:54,680 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 [2022-07-23 05:46:56,755 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 39 treesize of output 27 [2022-07-23 05:47:09,089 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 [2022-07-23 05:47:15,231 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 45 treesize of output 33 [2022-07-23 05:47:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:47:17,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:47:17,498 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 48 treesize of output 44 [2022-07-23 05:47:26,206 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:47:34,472 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:47:45,777 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:47:56,783 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:48:11,822 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:48:35,646 WARN L233 SmtUtils]: Spent 14.96s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:49:02,957 WARN L233 SmtUtils]: Spent 10.67s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:49:37,230 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:49:37,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-23 05:50:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:50:03,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:50:03,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308146675] [2022-07-23 05:50:03,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308146675] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:03,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:50:03,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-07-23 05:50:03,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588005955] [2022-07-23 05:50:03,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:03,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 05:50:03,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:50:03,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 05:50:03,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=729, Unknown=49, NotChecked=0, Total=870 [2022-07-23 05:50:03,583 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 30 states have internal predecessors, (57), 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) [2022-07-23 05:50:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:24,292 INFO L93 Difference]: Finished difference Result 128 states and 158 transitions. [2022-07-23 05:50:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:50:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 30 states have internal predecessors, (57), 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 29 [2022-07-23 05:50:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:24,293 INFO L225 Difference]: With dead ends: 128 [2022-07-23 05:50:24,293 INFO L226 Difference]: Without dead ends: 121 [2022-07-23 05:50:24,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 208.8s TimeCoverageRelationStatistics Valid=113, Invalid=890, Unknown=53, NotChecked=0, Total=1056 [2022-07-23 05:50:24,294 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:24,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 113 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2022-07-23 05:50:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-23 05:50:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-23 05:50:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.264957264957265) internal successors, (148), 120 states have internal predecessors, (148), 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) [2022-07-23 05:50:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2022-07-23 05:50:24,297 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 29 [2022-07-23 05:50:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:24,297 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2022-07-23 05:50:24,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 30 states have internal predecessors, (57), 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) [2022-07-23 05:50:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2022-07-23 05:50:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:50:24,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:24,297 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-07-23 05:50:24,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:24,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:50:24,506 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:50:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash 19219216, now seen corresponding path program 2 times [2022-07-23 05:50:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:50:24,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761149458] [2022-07-23 05:50:24,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:50:24,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:50:24,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:50:24,508 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) [2022-07-23 05:50:24,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 05:50:24,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:50:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:50:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:24,868 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 [2022-07-23 05:50:24,952 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 [2022-07-23 05:50:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:50:25,281 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-23 05:50:25,281 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 2 case distinctions, treesize of input 15 treesize of output 27 [2022-07-23 05:50:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:50:25,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:26,537 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 62 treesize of output 56 [2022-07-23 05:50:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:50:26,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:50:26,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761149458] [2022-07-23 05:50:26,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761149458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:26,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:50:26,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-07-23 05:50:26,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950927802] [2022-07-23 05:50:26,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:26,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 05:50:26,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:50:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 05:50:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:50:26,895 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-07-23 05:50:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:27,910 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2022-07-23 05:50:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:50:27,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 19 states have internal predecessors, (50), 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 29 [2022-07-23 05:50:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:27,911 INFO L225 Difference]: With dead ends: 121 [2022-07-23 05:50:27,911 INFO L226 Difference]: Without dead ends: 121 [2022-07-23 05:50:27,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:50:27,912 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:27,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 88 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-07-23 05:50:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-23 05:50:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-07-23 05:50:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 120 states have internal predecessors, (145), 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) [2022-07-23 05:50:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2022-07-23 05:50:27,914 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 29 [2022-07-23 05:50:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:27,915 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2022-07-23 05:50:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-07-23 05:50:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2022-07-23 05:50:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:50:27,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:27,915 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:50:27,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-23 05:50:28,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:50:28,116 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:50:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash 17372175, now seen corresponding path program 1 times [2022-07-23 05:50:28,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:50:28,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377546640] [2022-07-23 05:50:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:50:28,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:50:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:50:28,118 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:50:28,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 05:50:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:50:28,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:50:28,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:28,274 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 [2022-07-23 05:50:28,302 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 [2022-07-23 05:50:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:50:28,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:50:28,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:50:28,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377546640] [2022-07-23 05:50:28,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377546640] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:50:28,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:50:28,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 05:50:28,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918810704] [2022-07-23 05:50:28,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:50:28,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:50:28,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:50:28,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:50:28,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:50:28,347 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-07-23 05:50:28,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:28,774 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-07-23 05:50:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:50:28,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 29 [2022-07-23 05:50:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:28,776 INFO L225 Difference]: With dead ends: 54 [2022-07-23 05:50:28,776 INFO L226 Difference]: Without dead ends: 54 [2022-07-23 05:50:28,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:50:28,776 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:28,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 48 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:50:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-23 05:50:28,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-23 05:50:28,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 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) [2022-07-23 05:50:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-07-23 05:50:28,778 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2022-07-23 05:50:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:28,778 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-07-23 05:50:28,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-07-23 05:50:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-07-23 05:50:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 05:50:28,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:28,779 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2022-07-23 05:50:28,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:28,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:50:28,987 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:50:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1885020329, now seen corresponding path program 2 times [2022-07-23 05:50:28,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:50:28,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768102839] [2022-07-23 05:50:28,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:50:28,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:50:28,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:50:28,989 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) [2022-07-23 05:50:28,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-23 05:50:29,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-23 05:50:29,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:29,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:50:29,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:29,413 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-07-23 05:50:29,413 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 16 treesize of output 22 [2022-07-23 05:50:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-23 05:50:29,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:50:29,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:50:29,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768102839] [2022-07-23 05:50:29,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768102839] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:50:29,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:50:29,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:50:29,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718905076] [2022-07-23 05:50:29,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:50:29,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:50:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:50:29,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:50:29,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:50:29,831 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) [2022-07-23 05:50:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:34,469 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-07-23 05:50:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:50:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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 45 [2022-07-23 05:50:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:34,471 INFO L225 Difference]: With dead ends: 53 [2022-07-23 05:50:34,471 INFO L226 Difference]: Without dead ends: 53 [2022-07-23 05:50:34,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:50:34,472 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:34,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-07-23 05:50:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-23 05:50:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-23 05:50:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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) [2022-07-23 05:50:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-07-23 05:50:34,473 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 45 [2022-07-23 05:50:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:34,473 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-07-23 05:50:34,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) [2022-07-23 05:50:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-07-23 05:50:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:50:34,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:34,474 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-23 05:50:34,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:34,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:50:34,681 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:50:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1902250599, now seen corresponding path program 2 times [2022-07-23 05:50:34,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:50:34,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900874025] [2022-07-23 05:50:34,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:50:34,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:50:34,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:50:34,683 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) [2022-07-23 05:50:34,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 05:50:34,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:50:34,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:34,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:50:34,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:35,238 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 8 treesize of output 7 [2022-07-23 05:50:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:50:35,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:50:36,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:50:36,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900874025] [2022-07-23 05:50:36,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900874025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:36,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:50:36,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-07-23 05:50:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467619159] [2022-07-23 05:50:36,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:36,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 05:50:36,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:50:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 05:50:36,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:50:36,879 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 22 states, 21 states have (on average 4.761904761904762) internal successors, (100), 22 states have internal predecessors, (100), 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) [2022-07-23 05:50:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:50:46,523 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2022-07-23 05:50:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-23 05:50:46,526 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.761904761904762) internal successors, (100), 22 states have internal predecessors, (100), 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 52 [2022-07-23 05:50:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:50:46,527 INFO L225 Difference]: With dead ends: 119 [2022-07-23 05:50:46,527 INFO L226 Difference]: Without dead ends: 119 [2022-07-23 05:50:46,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1141, Invalid=3019, Unknown=0, NotChecked=0, Total=4160 [2022-07-23 05:50:46,529 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 271 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:50:46,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 89 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-23 05:50:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-23 05:50:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-07-23 05:50:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 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) [2022-07-23 05:50:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-07-23 05:50:46,530 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 52 [2022-07-23 05:50:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:50:46,531 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-07-23 05:50:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.761904761904762) internal successors, (100), 22 states have internal predecessors, (100), 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) [2022-07-23 05:50:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-07-23 05:50:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-23 05:50:46,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:50:46,532 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2022-07-23 05:50:46,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-23 05:50:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:50:46,744 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-23 05:50:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:50:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1670411065, now seen corresponding path program 3 times [2022-07-23 05:50:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:50:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201743779] [2022-07-23 05:50:46,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:50:46,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:50:46,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:50:46,746 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) [2022-07-23 05:50:46,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 05:50:48,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-23 05:50:48,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:50:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 05:50:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:50:49,886 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 8 treesize of output 7 [2022-07-23 05:50:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:50:50,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:50:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:50:54,162 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:50:54,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201743779] [2022-07-23 05:50:54,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201743779] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:50:54,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:50:54,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2022-07-23 05:50:54,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806852124] [2022-07-23 05:50:54,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:50:54,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-23 05:50:54,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:50:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-23 05:50:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2022-07-23 05:50:54,163 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 38 states, 37 states have (on average 6.162162162162162) internal successors, (228), 38 states have internal predecessors, (228), 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)