./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:55:02,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:55:02,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:55:02,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:55:02,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:55:02,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:55:02,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:55:02,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:55:02,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:55:02,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:55:02,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:55:02,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:55:02,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:55:02,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:55:02,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:55:02,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:55:02,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:55:02,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:55:02,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:55:02,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:55:02,188 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:55:02,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:55:02,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:55:02,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:55:02,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:55:02,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:55:02,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:55:02,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:55:02,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:55:02,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:55:02,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:55:02,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:55:02,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:55:02,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:55:02,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:55:02,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:55:02,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:55:02,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:55:02,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:55:02,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:55:02,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:55:02,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:55:02,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:55:02,241 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:55:02,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:55:02,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:55:02,242 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:55:02,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:55:02,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:55:02,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:55:02,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:55:02,244 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:55:02,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:55:02,245 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:55:02,245 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:55:02,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:55:02,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:55:02,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:55:02,246 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:55:02,246 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:55:02,246 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:55:02,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:55:02,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:55:02,247 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:55:02,247 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:55:02,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:55:02,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:55:02,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:55:02,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:55:02,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:55:02,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:55:02,249 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:55:02,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:55:02,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-07-21 17:55:02,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:55:02,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:55:02,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:55:02,554 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:55:02,554 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:55:02,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-21 17:55:02,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b88843a26/bbbfb83641924325b5cd8361ae761144/FLAG857d44012 [2022-07-21 17:55:03,307 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:55:03,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-21 17:55:03,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b88843a26/bbbfb83641924325b5cd8361ae761144/FLAG857d44012 [2022-07-21 17:55:03,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b88843a26/bbbfb83641924325b5cd8361ae761144 [2022-07-21 17:55:03,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:55:03,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:55:03,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:55:03,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:55:03,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:55:03,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:55:03" (1/1) ... [2022-07-21 17:55:03,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0a3ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:03, skipping insertion in model container [2022-07-21 17:55:03,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:55:03" (1/1) ... [2022-07-21 17:55:03,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:55:03,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:55:04,243 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-21 17:55:04,313 WARN L570 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2022-07-21 17:55:04,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:55:04,716 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-21 17:55:04,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f4733f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:04, skipping insertion in model container [2022-07-21 17:55:04,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:55:04,718 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-21 17:55:04,721 INFO L158 Benchmark]: Toolchain (without parser) took 1077.74ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 30.7MB in the beginning and 34.5MB in the end (delta: -3.8MB). Peak memory consumption was 27.2MB. Max. memory is 16.1GB. [2022-07-21 17:55:04,721 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 52.4MB. Free memory is still 34.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 17:55:04,723 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1076.00ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 30.6MB in the beginning and 34.5MB in the end (delta: -3.9MB). Peak memory consumption was 27.2MB. Max. memory is 16.1GB. [2022-07-21 17:55:04,725 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 52.4MB. Free memory is still 34.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1076.00ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 30.6MB in the beginning and 34.5MB in the end (delta: -3.9MB). Peak memory consumption was 27.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2246]: 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/ntdrivers/floppy.i.cil-3.c -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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:55:06,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:55:06,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:55:06,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:55:06,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:55:06,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:55:06,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:55:06,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:55:06,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:55:06,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:55:06,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:55:06,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:55:06,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:55:06,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:55:06,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:55:06,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:55:06,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:55:06,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:55:06,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:55:06,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:55:06,412 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:55:06,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:55:06,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:55:06,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:55:06,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:55:06,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:55:06,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:55:06,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:55:06,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:55:06,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:55:06,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:55:06,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:55:06,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:55:06,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:55:06,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:55:06,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:55:06,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:55:06,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:55:06,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:55:06,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:55:06,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:55:06,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:55:06,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-21 17:55:06,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:55:06,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:55:06,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:55:06,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:55:06,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:55:06,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:55:06,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:55:06,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:55:06,469 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:55:06,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:55:06,470 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:55:06,470 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:55:06,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:55:06,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:55:06,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:55:06,471 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:55:06,471 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:55:06,472 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:55:06,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:55:06,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:55:06,472 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 17:55:06,472 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 17:55:06,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:55:06,473 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:55:06,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:55:06,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:55:06,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:55:06,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:55:06,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:55:06,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:55:06,474 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 17:55:06,475 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 17:55:06,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 17:55:06,475 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-07-21 17:55:06,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:55:06,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:55:06,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:55:06,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:55:06,764 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:55:06,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-21 17:55:06,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea442e9d/2e2640f813c1402eae74b361f76c1f5d/FLAG783b283a8 [2022-07-21 17:55:07,528 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:55:07,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-07-21 17:55:07,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea442e9d/2e2640f813c1402eae74b361f76c1f5d/FLAG783b283a8 [2022-07-21 17:55:07,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea442e9d/2e2640f813c1402eae74b361f76c1f5d [2022-07-21 17:55:07,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:55:07,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:55:07,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:55:07,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:55:07,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:55:07,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:55:07" (1/1) ... [2022-07-21 17:55:07,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a46e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:07, skipping insertion in model container [2022-07-21 17:55:07,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:55:07" (1/1) ... [2022-07-21 17:55:07,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:55:07,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:55:08,508 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-21 17:55:08,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:55:08,986 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-21 17:55:09,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:55:09,088 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-21 17:55:09,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:55:09,330 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:55:09,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-07-21 17:55:09,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:55:09,653 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:55:09,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09 WrapperNode [2022-07-21 17:55:09,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:55:09,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:55:09,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:55:09,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:55:09,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:09,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:09,883 INFO L137 Inliner]: procedures = 142, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3022 [2022-07-21 17:55:09,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:55:09,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:55:09,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:55:09,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:55:09,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:09,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:09,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:09,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:10,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:10,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:10,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:10,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:55:10,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:55:10,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:55:10,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:55:10,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (1/1) ... [2022-07-21 17:55:10,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:55:10,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:55:10,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 17:55:10,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 17:55:10,199 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-07-21 17:55:10,200 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-07-21 17:55:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-21 17:55:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 17:55:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-21 17:55:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-07-21 17:55:10,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-21 17:55:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-21 17:55:10,201 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-21 17:55:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-07-21 17:55:10,201 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-07-21 17:55:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-07-21 17:55:10,201 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-07-21 17:55:10,201 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-07-21 17:55:10,202 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-07-21 17:55:10,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-07-21 17:55:10,202 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-21 17:55:10,203 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-21 17:55:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-07-21 17:55:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-07-21 17:55:10,203 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-07-21 17:55:10,204 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-07-21 17:55:10,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-07-21 17:55:10,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-21 17:55:10,204 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-21 17:55:10,204 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-21 17:55:10,204 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-21 17:55:10,204 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-07-21 17:55:10,205 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-07-21 17:55:10,205 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-07-21 17:55:10,205 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-07-21 17:55:10,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 17:55:10,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:55:10,206 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-07-21 17:55:10,206 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-07-21 17:55:10,206 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-07-21 17:55:10,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-07-21 17:55:10,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:55:10,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 17:55:10,207 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-21 17:55:10,207 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-21 17:55:10,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-07-21 17:55:10,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-07-21 17:55:10,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-07-21 17:55:10,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 17:55:10,208 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-07-21 17:55:10,208 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-07-21 17:55:10,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-07-21 17:55:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-07-21 17:55:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:55:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-21 17:55:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-07-21 17:55:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 17:55:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-07-21 17:55:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-21 17:55:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-21 17:55:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-07-21 17:55:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-07-21 17:55:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-07-21 17:55:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-07-21 17:55:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-07-21 17:55:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-07-21 17:55:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-07-21 17:55:10,212 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-21 17:55:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-21 17:55:10,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:55:10,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:55:10,746 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:55:10,751 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:55:10,814 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:10,822 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-21 17:55:10,822 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-21 17:55:10,827 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:11,203 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-21 17:55:11,203 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-21 17:55:11,244 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:11,260 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-21 17:55:11,260 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-21 17:55:11,265 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:13,392 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:13,411 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:13,445 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-07-21 17:55:13,445 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-07-21 17:55:13,448 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:13,449 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:13,449 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:13,791 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-07-21 17:55:13,791 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-07-21 17:55:13,791 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-07-21 17:55:13,791 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-07-21 17:55:13,791 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-07-21 17:55:13,791 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-07-21 17:55:13,796 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:13,813 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:13,829 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:17,865 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-07-21 17:55:17,865 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-07-21 17:55:17,865 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-07-21 17:55:17,865 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-07-21 17:55:17,865 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-07-21 17:55:17,865 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-07-21 17:55:18,000 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:18,104 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-21 17:55:18,105 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-21 17:55:18,116 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:18,118 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:18,120 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:18,124 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:18,124 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:18,129 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:18,130 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:18,132 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-21 17:55:21,283 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-07-21 17:55:21,283 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-07-21 17:55:21,283 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-07-21 17:55:21,284 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-07-21 17:55:21,285 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-07-21 17:55:21,285 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-07-21 17:55:21,285 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-07-21 17:55:21,285 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-07-21 17:55:21,301 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:55:21,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:55:21,322 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 17:55:21,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:55:21 BoogieIcfgContainer [2022-07-21 17:55:21,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:55:21,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:55:21,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:55:21,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:55:21,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:55:07" (1/3) ... [2022-07-21 17:55:21,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a949cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:55:21, skipping insertion in model container [2022-07-21 17:55:21,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:55:09" (2/3) ... [2022-07-21 17:55:21,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a949cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:55:21, skipping insertion in model container [2022-07-21 17:55:21,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:55:21" (3/3) ... [2022-07-21 17:55:21,333 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-07-21 17:55:21,345 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:55:21,345 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 954 error locations. [2022-07-21 17:55:21,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:55:21,432 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@39887ebc, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c8c101d [2022-07-21 17:55:21,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 954 error locations. [2022-07-21 17:55:21,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 2081 states, 1019 states have (on average 2.154072620215898) internal successors, (2195), 1997 states have internal predecessors, (2195), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-07-21 17:55:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-21 17:55:21,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:21,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-21 17:55:21,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:55:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1700083, now seen corresponding path program 1 times [2022-07-21 17:55:21,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:55:21,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660578528] [2022-07-21 17:55:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:21,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:55:21,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:55:21,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:55:21,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 17:55:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:55:22,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:55:23,184 INFO L356 Elim1Store]: treesize reduction 152, result has 17.8 percent of original size [2022-07-21 17:55:23,185 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 4 case distinctions, treesize of input 18 treesize of output 38 [2022-07-21 17:55:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:55:23,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:55:23,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:55:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660578528] [2022-07-21 17:55:23,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660578528] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:55:23,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:55:23,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:55:23,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209804110] [2022-07-21 17:55:23,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:55:23,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:55:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:55:23,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:55:23,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:55:23,272 INFO L87 Difference]: Start difference. First operand has 2081 states, 1019 states have (on average 2.154072620215898) internal successors, (2195), 1997 states have internal predecessors, (2195), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:26,154 INFO L93 Difference]: Finished difference Result 2077 states and 2349 transitions. [2022-07-21 17:55:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:55:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-21 17:55:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:26,177 INFO L225 Difference]: With dead ends: 2077 [2022-07-21 17:55:26,178 INFO L226 Difference]: Without dead ends: 2075 [2022-07-21 17:55:26,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:55:26,182 INFO L413 NwaCegarLoop]: 2312 mSDtfsCounter, 57 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:26,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 3654 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-21 17:55:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-07-21 17:55:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2075. [2022-07-21 17:55:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 1017 states have (on average 2.1435594886922322) internal successors, (2180), 1991 states have internal predecessors, (2180), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:55:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2347 transitions. [2022-07-21 17:55:26,287 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2347 transitions. Word has length 3 [2022-07-21 17:55:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:26,288 INFO L495 AbstractCegarLoop]: Abstraction has 2075 states and 2347 transitions. [2022-07-21 17:55:26,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2347 transitions. [2022-07-21 17:55:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-21 17:55:26,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:26,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-21 17:55:26,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 17:55:26,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:55:26,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:55:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:26,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1700084, now seen corresponding path program 1 times [2022-07-21 17:55:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:55:26,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834361697] [2022-07-21 17:55:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:26,511 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:55:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:55:26,512 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:55:26,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 17:55:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:27,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:55:27,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:55:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:55:28,152 INFO L356 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-07-21 17:55:28,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-07-21 17:55:28,181 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 1122 treesize of output 1106 [2022-07-21 17:55:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:55:28,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:55:28,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:55:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834361697] [2022-07-21 17:55:28,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834361697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:55:28,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:55:28,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:55:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118582784] [2022-07-21 17:55:28,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:55:28,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:55:28,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:55:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:55:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:55:28,372 INFO L87 Difference]: Start difference. First operand 2075 states and 2347 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:32,599 INFO L93 Difference]: Finished difference Result 2073 states and 2345 transitions. [2022-07-21 17:55:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:55:32,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-21 17:55:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:32,610 INFO L225 Difference]: With dead ends: 2073 [2022-07-21 17:55:32,610 INFO L226 Difference]: Without dead ends: 2073 [2022-07-21 17:55:32,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:55:32,615 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 5 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:32,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3723 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-21 17:55:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2022-07-21 17:55:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2073. [2022-07-21 17:55:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 1017 states have (on average 2.1415929203539825) internal successors, (2178), 1989 states have internal predecessors, (2178), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:55:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2345 transitions. [2022-07-21 17:55:32,676 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2345 transitions. Word has length 3 [2022-07-21 17:55:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:32,676 INFO L495 AbstractCegarLoop]: Abstraction has 2073 states and 2345 transitions. [2022-07-21 17:55:32,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2345 transitions. [2022-07-21 17:55:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:55:32,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:32,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:55:32,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:55:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:55:32,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:55:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash -890788470, now seen corresponding path program 1 times [2022-07-21 17:55:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:55:32,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564644961] [2022-07-21 17:55:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:32,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:55:32,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:55:32,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:55:32,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 17:55:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:33,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:55:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:55:33,780 INFO L356 Elim1Store]: treesize reduction 118, result has 36.2 percent of original size [2022-07-21 17:55:33,781 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 4 case distinctions, treesize of input 18 treesize of output 72 [2022-07-21 17:55:33,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:55:33,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-07-21 17:55:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:55:33,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:55:33,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:55:33,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564644961] [2022-07-21 17:55:33,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564644961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:55:33,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:55:33,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:55:33,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856384329] [2022-07-21 17:55:33,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:55:33,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:55:33,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:55:33,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:55:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:55:33,886 INFO L87 Difference]: Start difference. First operand 2073 states and 2345 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2022-07-21 17:55:38,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:55:43,583 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:55:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:43,644 INFO L93 Difference]: Finished difference Result 2072 states and 2344 transitions. [2022-07-21 17:55:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:55:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 [2022-07-21 17:55:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:43,653 INFO L225 Difference]: With dead ends: 2072 [2022-07-21 17:55:43,653 INFO L226 Difference]: Without dead ends: 2072 [2022-07-21 17:55:43,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:55:43,654 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 4 mSDsluCounter, 4091 mSDsCounter, 0 mSdLazyCounter, 2934 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2934 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:43,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6431 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2934 Invalid, 2 Unknown, 0 Unchecked, 9.6s Time] [2022-07-21 17:55:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-07-21 17:55:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2022-07-21 17:55:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1017 states have (on average 2.1406096361848572) internal successors, (2177), 1988 states have internal predecessors, (2177), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:55:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2022-07-21 17:55:43,695 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 6 [2022-07-21 17:55:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:43,695 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2022-07-21 17:55:43,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2022-07-21 17:55:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2022-07-21 17:55:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:55:43,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:43,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:55:43,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:55:43,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:55:43,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:55:43,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash -890788469, now seen corresponding path program 1 times [2022-07-21 17:55:43,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:55:43,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084450087] [2022-07-21 17:55:43,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:43,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:55:43,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:55:43,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:55:43,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 17:55:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:55:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:55:44,907 INFO L356 Elim1Store]: treesize reduction 130, result has 29.7 percent of original size [2022-07-21 17:55:44,907 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 4 case distinctions, treesize of input 18 treesize of output 60 [2022-07-21 17:55:44,962 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 13 treesize of output 9 [2022-07-21 17:55:44,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 17:55:45,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-07-21 17:55:45,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-21 17:55:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:55:45,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:55:45,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:55:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084450087] [2022-07-21 17:55:45,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084450087] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:55:45,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:55:45,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:55:45,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269182595] [2022-07-21 17:55:45,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:55:45,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:55:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:55:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:55:45,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:55:45,038 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2022-07-21 17:55:49,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:55:56,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-21 17:55:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:56,706 INFO L93 Difference]: Finished difference Result 2071 states and 2343 transitions. [2022-07-21 17:55:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:55:56,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 [2022-07-21 17:55:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:56,721 INFO L225 Difference]: With dead ends: 2071 [2022-07-21 17:55:56,721 INFO L226 Difference]: Without dead ends: 2071 [2022-07-21 17:55:56,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:55:56,723 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 2 mSDsluCounter, 4154 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6494 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:56,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6494 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2869 Invalid, 2 Unknown, 0 Unchecked, 11.5s Time] [2022-07-21 17:55:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-07-21 17:55:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2071. [2022-07-21 17:55:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1016 states have (on average 2.141732283464567) internal successors, (2176), 1987 states have internal predecessors, (2176), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:55:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2343 transitions. [2022-07-21 17:55:56,769 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2343 transitions. Word has length 6 [2022-07-21 17:55:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:56,769 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 2343 transitions. [2022-07-21 17:55:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2022-07-21 17:55:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2343 transitions. [2022-07-21 17:55:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 17:55:56,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:56,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:55:56,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:55:56,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:55:56,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:55:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1867291348, now seen corresponding path program 1 times [2022-07-21 17:55:56,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:55:56,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420445354] [2022-07-21 17:55:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:56,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:55:56,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:55:56,996 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) [2022-07-21 17:55:56,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 17:55:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 17:55:57,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:55:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:55:57,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:55:57,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:55:57,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420445354] [2022-07-21 17:55:57,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420445354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:55:57,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:55:57,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:55:57,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220423296] [2022-07-21 17:55:57,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:55:57,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:55:57,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:55:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:55:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:55:57,865 INFO L87 Difference]: Start difference. First operand 2071 states and 2343 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:55:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:57,957 INFO L93 Difference]: Finished difference Result 2074 states and 2346 transitions. [2022-07-21 17:55:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:55:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-21 17:55:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:57,965 INFO L225 Difference]: With dead ends: 2074 [2022-07-21 17:55:57,965 INFO L226 Difference]: Without dead ends: 2072 [2022-07-21 17:55:57,966 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 [2022-07-21 17:55:57,966 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 2 mSDsluCounter, 4677 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7018 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:57,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7018 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:55:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-07-21 17:55:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2022-07-21 17:55:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1017 states have (on average 2.1406096361848572) internal successors, (2177), 1988 states have internal predecessors, (2177), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:55:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2022-07-21 17:55:58,009 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 13 [2022-07-21 17:55:58,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:58,010 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2022-07-21 17:55:58,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:55:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2022-07-21 17:55:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 17:55:58,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:58,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:55:58,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:55:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:55:58,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:55:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1906515750, now seen corresponding path program 1 times [2022-07-21 17:55:58,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:55:58,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231351237] [2022-07-21 17:55:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:58,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:55:58,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:55:58,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:55:58,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 17:55:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:59,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 17:55:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:55:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:55:59,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:55:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:55:59,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:55:59,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231351237] [2022-07-21 17:55:59,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231351237] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:55:59,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:55:59,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 17:55:59,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602395291] [2022-07-21 17:55:59,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:55:59,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 17:55:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:55:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 17:55:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 17:55:59,203 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:55:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:59,436 INFO L93 Difference]: Finished difference Result 2084 states and 2359 transitions. [2022-07-21 17:55:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:55:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-07-21 17:55:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:59,444 INFO L225 Difference]: With dead ends: 2084 [2022-07-21 17:55:59,444 INFO L226 Difference]: Without dead ends: 2082 [2022-07-21 17:55:59,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-07-21 17:55:59,445 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 11 mSDsluCounter, 7012 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9352 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:59,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9352 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:55:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-07-21 17:55:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2082. [2022-07-21 17:55:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 1026 states have (on average 2.1335282651072123) internal successors, (2189), 1997 states have internal predecessors, (2189), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:55:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2356 transitions. [2022-07-21 17:55:59,479 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2356 transitions. Word has length 14 [2022-07-21 17:55:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:59,480 INFO L495 AbstractCegarLoop]: Abstraction has 2082 states and 2356 transitions. [2022-07-21 17:55:59,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:55:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2356 transitions. [2022-07-21 17:55:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:55:59,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:59,481 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:55:59,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:55:59,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:55:59,694 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:55:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494956, now seen corresponding path program 2 times [2022-07-21 17:55:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:55:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129857726] [2022-07-21 17:55:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:55:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:55:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:55:59,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:55:59,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 17:56:01,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:56:01,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:56:01,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 17:56:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:56:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:56:01,689 INFO L356 Elim1Store]: treesize reduction 142, result has 24.1 percent of original size [2022-07-21 17:56:01,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 85 [2022-07-21 17:56:52,126 INFO L356 Elim1Store]: treesize reduction 32, result has 58.4 percent of original size [2022-07-21 17:56:52,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 116 [2022-07-21 17:57:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 17:57:37,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:37,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:57:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129857726] [2022-07-21 17:57:37,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129857726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:37,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:37,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:57:37,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939443440] [2022-07-21 17:57:37,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:37,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:57:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-07-21 17:57:37,828 INFO L87 Difference]: Start difference. First operand 2082 states and 2356 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:37,860 INFO L93 Difference]: Finished difference Result 2083 states and 2356 transitions. [2022-07-21 17:57:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 17:57:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:37,867 INFO L225 Difference]: With dead ends: 2083 [2022-07-21 17:57:37,867 INFO L226 Difference]: Without dead ends: 2081 [2022-07-21 17:57:37,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-07-21 17:57:37,868 INFO L413 NwaCegarLoop]: 2335 mSDtfsCounter, 2 mSDsluCounter, 2732 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5067 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1946 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:37,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5067 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1946 Unchecked, 0.0s Time] [2022-07-21 17:57:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2022-07-21 17:57:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 2081. [2022-07-21 17:57:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 1026 states have (on average 2.1306042884990255) internal successors, (2186), 1996 states have internal predecessors, (2186), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:57:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 2353 transitions. [2022-07-21 17:57:37,900 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 2353 transitions. Word has length 17 [2022-07-21 17:57:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:37,900 INFO L495 AbstractCegarLoop]: Abstraction has 2081 states and 2353 transitions. [2022-07-21 17:57:37,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 2353 transitions. [2022-07-21 17:57:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:57:37,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:37,901 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:37,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:38,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:57:38,123 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:57:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494955, now seen corresponding path program 1 times [2022-07-21 17:57:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:57:38,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79754066] [2022-07-21 17:57:38,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:38,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:57:38,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:57:38,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:57:38,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 17:57:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1318 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:57:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:39,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:39,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:57:39,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79754066] [2022-07-21 17:57:39,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79754066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:39,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:57:39,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-21 17:57:39,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363935742] [2022-07-21 17:57:39,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:39,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 17:57:39,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:57:39,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 17:57:39,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:57:39,327 INFO L87 Difference]: Start difference. First operand 2081 states and 2353 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:39,988 INFO L93 Difference]: Finished difference Result 2100 states and 2376 transitions. [2022-07-21 17:57:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 17:57:39,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-21 17:57:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:39,995 INFO L225 Difference]: With dead ends: 2100 [2022-07-21 17:57:39,995 INFO L226 Difference]: Without dead ends: 2090 [2022-07-21 17:57:39,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:57:39,996 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 41 mSDsluCounter, 18692 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 21033 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:39,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 21033 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:57:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2022-07-21 17:57:40,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2090. [2022-07-21 17:57:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1035 states have (on average 2.1207729468599035) internal successors, (2195), 2005 states have internal predecessors, (2195), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:57:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 2362 transitions. [2022-07-21 17:57:40,030 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 2362 transitions. Word has length 17 [2022-07-21 17:57:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:40,030 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 2362 transitions. [2022-07-21 17:57:40,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 2362 transitions. [2022-07-21 17:57:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:57:40,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:40,031 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:40,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-21 17:57:40,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:57:40,247 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:57:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1174908437, now seen corresponding path program 2 times [2022-07-21 17:57:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:57:40,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988244120] [2022-07-21 17:57:40,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:57:40,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:57:40,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:57:40,251 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:57:40,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 17:57:43,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:57:43,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:57:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:57:43,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:43,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:43,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:43,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:43,805 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-21 17:57:43,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-07-21 17:57:43,835 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-21 17:57:43,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2022-07-21 17:57:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:57:44,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:57:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-21 17:57:44,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:44,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:57:44,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988244120] [2022-07-21 17:57:44,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988244120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:44,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:44,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:57:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668383135] [2022-07-21 17:57:44,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:57:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:57:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:57:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:44,128 INFO L87 Difference]: Start difference. First operand 2090 states and 2362 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:44,180 INFO L93 Difference]: Finished difference Result 2089 states and 2361 transitions. [2022-07-21 17:57:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:57:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-07-21 17:57:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:44,188 INFO L225 Difference]: With dead ends: 2089 [2022-07-21 17:57:44,188 INFO L226 Difference]: Without dead ends: 2089 [2022-07-21 17:57:44,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:57:44,189 INFO L413 NwaCegarLoop]: 2335 mSDtfsCounter, 6 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5108 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1902 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:44,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 5108 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 1902 Unchecked, 0.0s Time] [2022-07-21 17:57:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-07-21 17:57:44,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2089. [2022-07-21 17:57:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1035 states have (on average 2.119806763285024) internal successors, (2194), 2004 states have internal predecessors, (2194), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:57:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 2361 transitions. [2022-07-21 17:57:44,218 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 2361 transitions. Word has length 23 [2022-07-21 17:57:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:44,219 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 2361 transitions. [2022-07-21 17:57:44,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 2361 transitions. [2022-07-21 17:57:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:57:44,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:44,220 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:44,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:44,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:57:44,435 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:57:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:44,436 INFO L85 PathProgramCache]: Analyzing trace with hash -489338443, now seen corresponding path program 1 times [2022-07-21 17:57:44,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:57:44,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411660509] [2022-07-21 17:57:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:44,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:57:44,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:57:44,439 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) [2022-07-21 17:57:44,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 17:57:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:45,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 17:57:45,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:45,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:46,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:57:46,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411660509] [2022-07-21 17:57:46,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411660509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:46,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:57:46,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-21 17:57:46,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37084851] [2022-07-21 17:57:46,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:46,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 17:57:46,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:57:46,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 17:57:46,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:57:46,045 INFO L87 Difference]: Start difference. First operand 2089 states and 2361 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:48,189 INFO L93 Difference]: Finished difference Result 2123 states and 2405 transitions. [2022-07-21 17:57:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 17:57:48,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-21 17:57:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:48,196 INFO L225 Difference]: With dead ends: 2123 [2022-07-21 17:57:48,196 INFO L226 Difference]: Without dead ends: 2107 [2022-07-21 17:57:48,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=890, Invalid=1866, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 17:57:48,198 INFO L413 NwaCegarLoop]: 2343 mSDtfsCounter, 116 mSDsluCounter, 25738 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 28081 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:48,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 28081 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 17:57:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-07-21 17:57:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2107. [2022-07-21 17:57:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1053 states have (on average 2.100664767331434) internal successors, (2212), 2022 states have internal predecessors, (2212), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:57:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2379 transitions. [2022-07-21 17:57:48,226 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2379 transitions. Word has length 25 [2022-07-21 17:57:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:48,226 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 2379 transitions. [2022-07-21 17:57:48,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:57:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2379 transitions. [2022-07-21 17:57:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:57:48,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:48,228 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:48,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:48,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:57:48,447 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:57:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314357, now seen corresponding path program 2 times [2022-07-21 17:57:48,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:57:48,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834661895] [2022-07-21 17:57:48,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:57:48,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:57:48,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:57:48,450 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:57:48,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 17:57:50,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:57:50,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:57:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:57:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:51,136 INFO L356 Elim1Store]: treesize reduction 345, result has 15.0 percent of original size [2022-07-21 17:57:51,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 93 treesize of output 128 [2022-07-21 17:57:53,501 INFO L356 Elim1Store]: treesize reduction 55, result has 42.7 percent of original size [2022-07-21 17:57:53,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 75 [2022-07-21 17:57:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-21 17:57:53,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:57:53,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:57:53,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834661895] [2022-07-21 17:57:53,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834661895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:57:53,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:57:53,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:57:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877118306] [2022-07-21 17:57:53,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:57:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:57:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:57:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:57:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:57:53,750 INFO L87 Difference]: Start difference. First operand 2107 states and 2379 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:57:55,946 INFO L93 Difference]: Finished difference Result 2106 states and 2378 transitions. [2022-07-21 17:57:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:57:55,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-07-21 17:57:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:57:55,953 INFO L225 Difference]: With dead ends: 2106 [2022-07-21 17:57:55,953 INFO L226 Difference]: Without dead ends: 2106 [2022-07-21 17:57:55,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:57:55,953 INFO L413 NwaCegarLoop]: 2332 mSDtfsCounter, 6 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3689 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:57:55,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3689 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 971 Invalid, 0 Unknown, 10 Unchecked, 2.2s Time] [2022-07-21 17:57:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2022-07-21 17:57:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2022-07-21 17:57:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 1053 states have (on average 2.0997150997150995) internal successors, (2211), 2021 states have internal predecessors, (2211), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:57:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 2378 transitions. [2022-07-21 17:57:55,982 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 2378 transitions. Word has length 37 [2022-07-21 17:57:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:57:55,982 INFO L495 AbstractCegarLoop]: Abstraction has 2106 states and 2378 transitions. [2022-07-21 17:57:55,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:57:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 2378 transitions. [2022-07-21 17:57:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 17:57:55,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:57:55,983 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:57:56,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:57:56,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:57:56,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:57:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:57:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314358, now seen corresponding path program 1 times [2022-07-21 17:57:56,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:57:56,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055461726] [2022-07-21 17:57:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:57:56,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:57:56,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:57:56,207 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:57:56,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 17:57:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:57:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 17:57:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:57:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:57,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:57:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:57:59,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:57:59,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055461726] [2022-07-21 17:57:59,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055461726] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:57:59,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:57:59,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-21 17:57:59,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848529087] [2022-07-21 17:57:59,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:57:59,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-21 17:57:59,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:57:59,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-21 17:57:59,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 17:57:59,550 INFO L87 Difference]: Start difference. First operand 2106 states and 2378 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:58:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:10,505 INFO L93 Difference]: Finished difference Result 2170 states and 2464 transitions. [2022-07-21 17:58:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-21 17:58:10,506 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-07-21 17:58:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:10,513 INFO L225 Difference]: With dead ends: 2170 [2022-07-21 17:58:10,513 INFO L226 Difference]: Without dead ends: 2142 [2022-07-21 17:58:10,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3512, Invalid=7830, Unknown=0, NotChecked=0, Total=11342 [2022-07-21 17:58:10,517 INFO L413 NwaCegarLoop]: 2348 mSDtfsCounter, 351 mSDsluCounter, 53927 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 56275 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:10,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 56275 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-21 17:58:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-07-21 17:58:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2142. [2022-07-21 17:58:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 1089 states have (on average 2.0633608815426996) internal successors, (2247), 2057 states have internal predecessors, (2247), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-07-21 17:58:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2414 transitions. [2022-07-21 17:58:10,544 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2414 transitions. Word has length 37 [2022-07-21 17:58:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:10,544 INFO L495 AbstractCegarLoop]: Abstraction has 2142 states and 2414 transitions. [2022-07-21 17:58:10,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 17:58:10,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2414 transitions. [2022-07-21 17:58:10,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 17:58:10,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:10,546 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:10,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:10,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:10,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:58:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash 283062838, now seen corresponding path program 2 times [2022-07-21 17:58:10,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:10,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884059771] [2022-07-21 17:58:10,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:58:10,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:10,772 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) [2022-07-21 17:58:10,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 17:58:14,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:58:14,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:58:14,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 17:58:14,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:14,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:14,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 34 [2022-07-21 17:58:14,717 INFO L356 Elim1Store]: treesize reduction 345, result has 15.0 percent of original size [2022-07-21 17:58:14,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 93 treesize of output 128 [2022-07-21 17:58:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:58:18,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 17:58:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-07-21 17:58:18,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:58:18,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884059771] [2022-07-21 17:58:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884059771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:58:18,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:58:18,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:58:18,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458701707] [2022-07-21 17:58:18,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:58:18,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:58:18,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:18,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:58:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:58:18,966 INFO L87 Difference]: Start difference. First operand 2142 states and 2414 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:58:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:58:25,703 INFO L93 Difference]: Finished difference Result 3532 states and 4049 transitions. [2022-07-21 17:58:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:58:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-07-21 17:58:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:58:25,715 INFO L225 Difference]: With dead ends: 3532 [2022-07-21 17:58:25,715 INFO L226 Difference]: Without dead ends: 3532 [2022-07-21 17:58:25,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:58:25,716 INFO L413 NwaCegarLoop]: 1063 mSDtfsCounter, 2704 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2706 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 4208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1270 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:58:25,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2706 Valid, 3076 Invalid, 4208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2894 Invalid, 0 Unknown, 1270 Unchecked, 6.6s Time] [2022-07-21 17:58:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2022-07-21 17:58:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 2867. [2022-07-21 17:58:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 1748 states have (on average 2.0635011441647597) internal successors, (3607), 2717 states have internal predecessors, (3607), 149 states have call successors, (149), 42 states have call predecessors, (149), 43 states have return successors, (132), 121 states have call predecessors, (132), 126 states have call successors, (132) [2022-07-21 17:58:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 3888 transitions. [2022-07-21 17:58:25,769 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 3888 transitions. Word has length 61 [2022-07-21 17:58:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:58:25,770 INFO L495 AbstractCegarLoop]: Abstraction has 2867 states and 3888 transitions. [2022-07-21 17:58:25,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 17:58:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 3888 transitions. [2022-07-21 17:58:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 17:58:25,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:58:25,772 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:58:25,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:58:25,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 17:58:25,997 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-07-21 17:58:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:58:25,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1440500246, now seen corresponding path program 1 times [2022-07-21 17:58:25,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 17:58:25,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72454517] [2022-07-21 17:58:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:58:25,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 17:58:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 17:58:26,001 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 17:58:26,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 17:58:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:58:27,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-21 17:58:27,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:58:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:28,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:58:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:58:35,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 17:58:35,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72454517] [2022-07-21 17:58:35,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72454517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:58:35,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 17:58:35,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-07-21 17:58:35,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174523379] [2022-07-21 17:58:35,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 17:58:35,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-21 17:58:35,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 17:58:35,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-21 17:58:35,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=7009, Unknown=0, NotChecked=0, Total=9506 [2022-07-21 17:58:35,276 INFO L87 Difference]: Start difference. First operand 2867 states and 3888 transitions. Second operand has 98 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)