./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:08:45,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:08:45,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:08:45,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:08:45,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:08:45,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:08:45,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:08:45,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:08:45,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:08:45,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:08:45,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:08:45,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:08:45,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:08:45,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:08:45,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:08:45,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:08:45,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:08:45,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:08:45,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:08:45,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:08:45,503 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:08:45,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:08:45,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:08:45,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:08:45,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:08:45,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:08:45,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:08:45,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:08:45,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:08:45,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:08:45,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:08:45,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:08:45,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:08:45,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:08:45,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:08:45,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:08:45,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:08:45,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:08:45,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:08:45,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:08:45,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:08:45,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:08:45,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:08:45,553 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:08:45,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:08:45,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:08:45,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:08:45,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:08:45,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:08:45,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:08:45,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:08:45,554 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:08:45,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:08:45,554 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:08:45,554 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:08:45,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:08:45,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:08:45,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:08:45,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:08:45,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:08:45,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:08:45,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:08:45,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:08:45,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 [2022-07-14 06:08:45,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:08:45,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:08:45,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:08:45,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:08:45,813 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:08:45,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2022-07-14 06:08:45,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24a9387a/6f29d280c39b4e5eb16e0ed4a76312b9/FLAG7cd466404 [2022-07-14 06:08:46,246 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:08:46,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2022-07-14 06:08:46,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24a9387a/6f29d280c39b4e5eb16e0ed4a76312b9/FLAG7cd466404 [2022-07-14 06:08:46,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e24a9387a/6f29d280c39b4e5eb16e0ed4a76312b9 [2022-07-14 06:08:46,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:08:46,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:08:46,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:08:46,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:08:46,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:08:46,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7406af24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46, skipping insertion in model container [2022-07-14 06:08:46,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:08:46" (1/1) ... [2022-07-14 06:08:46,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:08:46,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:08:46,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:08:46,604 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-14 06:08:46,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@33eccab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:46, skipping insertion in model container [2022-07-14 06:08:46,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:08:46,606 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-14 06:08:46,608 INFO L158 Benchmark]: Toolchain (without parser) took 332.52ms. Allocated memory was 83.9MB in the beginning and 111.1MB in the end (delta: 27.3MB). Free memory was 44.8MB in the beginning and 84.5MB in the end (delta: -39.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:08:46,609 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory was 61.9MB in the beginning and 61.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:08:46,610 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.50ms. Allocated memory was 83.9MB in the beginning and 111.1MB in the end (delta: 27.3MB). Free memory was 63.2MB in the beginning and 84.5MB in the end (delta: -21.4MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2022-07-14 06:08:46,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 83.9MB. Free memory was 61.9MB in the beginning and 61.8MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.50ms. Allocated memory was 83.9MB in the beginning and 111.1MB in the end (delta: 27.3MB). Free memory was 63.2MB in the beginning and 84.5MB in the end (delta: -21.4MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:08:48,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:08:48,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:08:48,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:08:48,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:08:48,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:08:48,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:08:48,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:08:48,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:08:48,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:08:48,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:08:48,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:08:48,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:08:48,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:08:48,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:08:48,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:08:48,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:08:48,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:08:48,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:08:48,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:08:48,365 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:08:48,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:08:48,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:08:48,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:08:48,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:08:48,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:08:48,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:08:48,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:08:48,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:08:48,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:08:48,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:08:48,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:08:48,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:08:48,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:08:48,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:08:48,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:08:48,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:08:48,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:08:48,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:08:48,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:08:48,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:08:48,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:08:48,378 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:08:48,395 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:08:48,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:08:48,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:08:48,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:08:48,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:08:48,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:08:48,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:08:48,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:08:48,398 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:08:48,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:08:48,398 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:08:48,398 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:08:48,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:08:48,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:08:48,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:08:48,399 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:08:48,399 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:08:48,400 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:08:48,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:08:48,400 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:08:48,400 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:08:48,400 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:08:48,401 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:08:48,401 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:08:48,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:08:48,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:08:48,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:08:48,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:08:48,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:08:48,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:08:48,402 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:08:48,403 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:08:48,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:08:48,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ecc590057ed2a75208183cfd6234616268fa2b1af2dc90ae740756ef7d3d489 [2022-07-14 06:08:48,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:08:48,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:08:48,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:08:48,701 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:08:48,702 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:08:48,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2022-07-14 06:08:48,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ff35c1b/7e893e6aa7a7481a85611a45c5d2f352/FLAGe01edabc7 [2022-07-14 06:08:49,069 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:08:49,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/stroeder1-alloca-1.i [2022-07-14 06:08:49,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ff35c1b/7e893e6aa7a7481a85611a45c5d2f352/FLAGe01edabc7 [2022-07-14 06:08:49,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ff35c1b/7e893e6aa7a7481a85611a45c5d2f352 [2022-07-14 06:08:49,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:08:49,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:08:49,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:08:49,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:08:49,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:08:49,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dba7670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49, skipping insertion in model container [2022-07-14 06:08:49,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:08:49,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:08:49,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:08:49,805 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-14 06:08:49,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:08:49,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:08:49,830 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:08:49,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:08:49,875 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:08:49,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49 WrapperNode [2022-07-14 06:08:49,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:08:49,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:08:49,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:08:49,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:08:49,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,916 INFO L137 Inliner]: procedures = 119, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-07-14 06:08:49,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:08:49,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:08:49,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:08:49,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:08:49,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:08:49,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:08:49,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:08:49,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:08:49,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (1/1) ... [2022-07-14 06:08:49,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:08:49,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:08:49,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:08:49,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:08:50,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-14 06:08:50,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:08:50,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:08:50,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:08:50,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:08:50,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:08:50,064 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:08:50,069 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:08:50,252 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:08:50,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:08:50,257 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-14 06:08:50,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:08:50 BoogieIcfgContainer [2022-07-14 06:08:50,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:08:50,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:08:50,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:08:50,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:08:50,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:08:49" (1/3) ... [2022-07-14 06:08:50,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8a65e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:08:50, skipping insertion in model container [2022-07-14 06:08:50,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:08:49" (2/3) ... [2022-07-14 06:08:50,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8a65e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:08:50, skipping insertion in model container [2022-07-14 06:08:50,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:08:50" (3/3) ... [2022-07-14 06:08:50,264 INFO L111 eAbstractionObserver]: Analyzing ICFG stroeder1-alloca-1.i [2022-07-14 06:08:50,306 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:08:50,307 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-07-14 06:08:50,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:08:50,367 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@4ea5c38d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7a7f19dd [2022-07-14 06:08:50,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-14 06:08:50,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:08:50,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:50,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:08:50,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:50,381 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-07-14 06:08:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:50,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672708725] [2022-07-14 06:08:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:50,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:50,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:50,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:50,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:08:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:50,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:08:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:50,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:50,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:50,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:50,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672708725] [2022-07-14 06:08:50,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672708725] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:50,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:50,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:08:50,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781835271] [2022-07-14 06:08:50,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:50,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:08:50,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:50,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:08:50,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:08:50,586 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2022-07-14 06:08:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:50,624 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-07-14 06:08:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:08:50,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2022-07-14 06:08:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:50,635 INFO L225 Difference]: With dead ends: 22 [2022-07-14 06:08:50,635 INFO L226 Difference]: Without dead ends: 20 [2022-07-14 06:08:50,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:08:50,639 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:50,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:08:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-14 06:08:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-14 06:08:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-14 06:08:50,675 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2022-07-14 06:08:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:50,676 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-14 06:08:50,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2022-07-14 06:08:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-14 06:08:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:08:50,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:50,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:08:50,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-14 06:08:50,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:50,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:50,904 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-07-14 06:08:50,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:50,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176230304] [2022-07-14 06:08:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:50,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:50,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:50,908 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:50,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:08:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 06:08:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:51,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:51,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:51,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:51,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176230304] [2022-07-14 06:08:51,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176230304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:51,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:51,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:08:51,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108989506] [2022-07-14 06:08:51,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:51,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:08:51,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:51,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:08:51,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:51,111 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:51,217 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-07-14 06:08:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:08:51,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:08:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:51,219 INFO L225 Difference]: With dead ends: 41 [2022-07-14 06:08:51,219 INFO L226 Difference]: Without dead ends: 41 [2022-07-14 06:08:51,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:51,220 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:51,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 65 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:08:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-14 06:08:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2022-07-14 06:08:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-14 06:08:51,229 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2022-07-14 06:08:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:51,229 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-14 06:08:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-14 06:08:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:08:51,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:51,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:08:51,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:51,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:51,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-07-14 06:08:51,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:51,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696376508] [2022-07-14 06:08:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:51,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:51,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:51,445 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:51,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:08:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:51,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:08:51,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:51,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:08:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:51,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:51,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696376508] [2022-07-14 06:08:51,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696376508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:51,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:51,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:08:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176891046] [2022-07-14 06:08:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:51,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:08:51,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:08:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:51,557 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:51,591 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-14 06:08:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:08:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:08:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:51,592 INFO L225 Difference]: With dead ends: 25 [2022-07-14 06:08:51,593 INFO L226 Difference]: Without dead ends: 25 [2022-07-14 06:08:51,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:51,594 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:51,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-07-14 06:08:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-14 06:08:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-14 06:08:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-14 06:08:51,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 6 [2022-07-14 06:08:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:51,598 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-14 06:08:51,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-14 06:08:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:08:51,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:51,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:51,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:51,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:51,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:51,811 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2022-07-14 06:08:51,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:51,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58169765] [2022-07-14 06:08:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:51,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:51,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:51,814 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:51,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:08:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:08:51,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:51,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:51,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:51,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:51,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58169765] [2022-07-14 06:08:51,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58169765] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:51,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:51,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:08:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988738594] [2022-07-14 06:08:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:08:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:08:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:51,941 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:52,010 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-07-14 06:08:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:08:52,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2022-07-14 06:08:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:52,011 INFO L225 Difference]: With dead ends: 26 [2022-07-14 06:08:52,011 INFO L226 Difference]: Without dead ends: 26 [2022-07-14 06:08:52,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:08:52,012 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:52,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:08:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-14 06:08:52,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-07-14 06:08:52,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-14 06:08:52,015 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2022-07-14 06:08:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:52,016 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-14 06:08:52,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-14 06:08:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 06:08:52,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:52,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:52,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:52,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:52,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:52,218 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2022-07-14 06:08:52,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:52,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201872029] [2022-07-14 06:08:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:52,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:52,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:52,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:52,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:08:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:52,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 06:08:52,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:52,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:08:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:52,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:52,389 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:52,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201872029] [2022-07-14 06:08:52,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201872029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:52,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:52,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:08:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393081742] [2022-07-14 06:08:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:52,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:08:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:08:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:08:52,391 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:52,416 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-07-14 06:08:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:08:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 8 [2022-07-14 06:08:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:52,417 INFO L225 Difference]: With dead ends: 26 [2022-07-14 06:08:52,417 INFO L226 Difference]: Without dead ends: 26 [2022-07-14 06:08:52,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:08:52,418 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:52,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-14 06:08:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-14 06:08:52,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-14 06:08:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-14 06:08:52,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 8 [2022-07-14 06:08:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:52,422 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-14 06:08:52,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-14 06:08:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:08:52,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:52,423 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:52,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:52,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:52,634 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:52,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-07-14 06:08:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:52,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761198997] [2022-07-14 06:08:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:52,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:52,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:52,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:08:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:08:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:52,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:52,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:52,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761198997] [2022-07-14 06:08:52,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761198997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:52,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:52,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 06:08:52,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513441930] [2022-07-14 06:08:52,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:52,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:08:52,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:52,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:08:52,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:08:52,799 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:52,852 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-07-14 06:08:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:08:52,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:08:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:52,853 INFO L225 Difference]: With dead ends: 40 [2022-07-14 06:08:52,853 INFO L226 Difference]: Without dead ends: 40 [2022-07-14 06:08:52,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:08:52,854 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:52,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 61 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:08:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-14 06:08:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-07-14 06:08:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-14 06:08:52,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2022-07-14 06:08:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:52,858 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-14 06:08:52,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-14 06:08:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:08:52,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:52,859 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:52,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:53,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:53,064 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:53,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-07-14 06:08:53,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:53,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419027407] [2022-07-14 06:08:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:53,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:53,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:53,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:53,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:08:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:08:53,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:53,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:08:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:53,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:53,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:53,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419027407] [2022-07-14 06:08:53,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419027407] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:53,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:53,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-07-14 06:08:53,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815765784] [2022-07-14 06:08:53,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:53,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:08:53,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:08:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:08:53,663 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:53,911 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-07-14 06:08:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:08:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:08:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:53,913 INFO L225 Difference]: With dead ends: 45 [2022-07-14 06:08:53,913 INFO L226 Difference]: Without dead ends: 45 [2022-07-14 06:08:53,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:08:53,919 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:53,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-07-14 06:08:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-14 06:08:53,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2022-07-14 06:08:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-14 06:08:53,923 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 10 [2022-07-14 06:08:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:53,923 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-14 06:08:53,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-14 06:08:53,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:08:53,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:53,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:53,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:54,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:54,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:54,146 INFO L85 PathProgramCache]: Analyzing trace with hash -680998151, now seen corresponding path program 1 times [2022-07-14 06:08:54,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:54,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084714564] [2022-07-14 06:08:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:54,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:54,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:54,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:54,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 06:08:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 06:08:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:54,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:08:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:54,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:54,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:54,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084714564] [2022-07-14 06:08:54,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084714564] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:54,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:54,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:08:54,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236658626] [2022-07-14 06:08:54,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:54,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:08:54,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:54,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:08:54,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:08:54,270 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:54,412 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-07-14 06:08:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:08:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 06:08:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:54,413 INFO L225 Difference]: With dead ends: 58 [2022-07-14 06:08:54,413 INFO L226 Difference]: Without dead ends: 58 [2022-07-14 06:08:54,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:08:54,414 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:54,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 72 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:08:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-14 06:08:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2022-07-14 06:08:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-07-14 06:08:54,417 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 12 [2022-07-14 06:08:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:54,418 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-07-14 06:08:54,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-07-14 06:08:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:08:54,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:54,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:54,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-14 06:08:54,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:54,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025161, now seen corresponding path program 1 times [2022-07-14 06:08:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:54,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017471116] [2022-07-14 06:08:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:54,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:54,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:54,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:54,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:08:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:08:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:54,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:08:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:55,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:55,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017471116] [2022-07-14 06:08:55,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017471116] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-14 06:08:55,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:08:55,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-07-14 06:08:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371559796] [2022-07-14 06:08:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:08:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:08:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:08:55,652 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:56,114 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-07-14 06:08:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:08:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 06:08:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:56,116 INFO L225 Difference]: With dead ends: 46 [2022-07-14 06:08:56,117 INFO L226 Difference]: Without dead ends: 46 [2022-07-14 06:08:56,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:08:56,117 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:56,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:08:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-14 06:08:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-07-14 06:08:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-07-14 06:08:56,121 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 12 [2022-07-14 06:08:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:56,121 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-07-14 06:08:56,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-07-14 06:08:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:08:56,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:56,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:56,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:56,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1604245468, now seen corresponding path program 1 times [2022-07-14 06:08:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727950378] [2022-07-14 06:08:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:56,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:56,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:56,333 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:56,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 06:08:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:08:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:56,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:56,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:56,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727950378] [2022-07-14 06:08:56,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727950378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:56,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:56,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:08:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127510437] [2022-07-14 06:08:56,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:56,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:08:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:08:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:08:56,405 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:56,434 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-07-14 06:08:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:08:56,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-07-14 06:08:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:56,435 INFO L225 Difference]: With dead ends: 51 [2022-07-14 06:08:56,435 INFO L226 Difference]: Without dead ends: 51 [2022-07-14 06:08:56,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:56,436 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:56,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 52 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:08:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-14 06:08:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-07-14 06:08:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-07-14 06:08:56,439 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2022-07-14 06:08:56,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:56,439 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-07-14 06:08:56,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-07-14 06:08:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:08:56,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:56,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:56,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:56,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:56,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:56,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1346080030, now seen corresponding path program 1 times [2022-07-14 06:08:56,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:56,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599249076] [2022-07-14 06:08:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:56,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:56,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:56,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:56,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:08:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:56,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 06:08:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:56,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:56,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599249076] [2022-07-14 06:08:56,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599249076] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:56,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:56,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-14 06:08:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292945727] [2022-07-14 06:08:56,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:08:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:56,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:08:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:08:56,837 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:57,037 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-07-14 06:08:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:08:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 14 [2022-07-14 06:08:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:57,039 INFO L225 Difference]: With dead ends: 53 [2022-07-14 06:08:57,039 INFO L226 Difference]: Without dead ends: 53 [2022-07-14 06:08:57,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:08:57,040 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:57,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 66 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:08:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-14 06:08:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2022-07-14 06:08:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-07-14 06:08:57,042 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 14 [2022-07-14 06:08:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:57,042 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-07-14 06:08:57,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-07-14 06:08:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:08:57,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:57,043 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:57,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:57,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:57,252 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:57,252 INFO L85 PathProgramCache]: Analyzing trace with hash 262066236, now seen corresponding path program 1 times [2022-07-14 06:08:57,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:57,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980184645] [2022-07-14 06:08:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:57,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:57,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:57,254 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:57,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 06:08:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:57,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:08:57,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:57,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:57,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:57,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980184645] [2022-07-14 06:08:57,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980184645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:57,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:57,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 06:08:57,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783569411] [2022-07-14 06:08:57,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:57,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:08:57,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:08:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:08:57,403 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:57,451 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-07-14 06:08:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:08:57,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 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 16 [2022-07-14 06:08:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:57,452 INFO L225 Difference]: With dead ends: 47 [2022-07-14 06:08:57,452 INFO L226 Difference]: Without dead ends: 47 [2022-07-14 06:08:57,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:08:57,453 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:57,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:08:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-14 06:08:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-07-14 06:08:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-07-14 06:08:57,455 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2022-07-14 06:08:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:57,456 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-07-14 06:08:57,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-07-14 06:08:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:08:57,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:57,456 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:57,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:57,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:57,657 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash -749051014, now seen corresponding path program 1 times [2022-07-14 06:08:57,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:57,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495310175] [2022-07-14 06:08:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:57,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:57,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:57,659 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:57,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:08:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:57,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 06:08:57,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:57,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:08:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:57,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:08:58,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495310175] [2022-07-14 06:08:58,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495310175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:58,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:08:58,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-14 06:08:58,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354898688] [2022-07-14 06:08:58,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:58,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:08:58,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:08:58,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:08:58,436 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:58,949 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-07-14 06:08:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:08:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 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 16 [2022-07-14 06:08:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:58,950 INFO L225 Difference]: With dead ends: 55 [2022-07-14 06:08:58,950 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 06:08:58,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:08:58,951 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:58,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 57 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 56 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-07-14 06:08:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 06:08:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-07-14 06:08:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-14 06:08:58,957 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2022-07-14 06:08:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:58,958 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-14 06:08:58,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-14 06:08:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:08:58,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:58,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:08:58,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:08:59,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:59,159 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1557469017, now seen corresponding path program 1 times [2022-07-14 06:08:59,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:59,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059500074] [2022-07-14 06:08:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:08:59,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:59,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:59,162 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:59,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:08:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:08:59,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:08:59,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:08:59,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:08:59,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:08:59,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059500074] [2022-07-14 06:08:59,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059500074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:08:59,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:08:59,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:08:59,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510157537] [2022-07-14 06:08:59,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:08:59,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:08:59,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:08:59,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:08:59,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:59,293 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:08:59,297 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-07-14 06:08:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:08:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 06:08:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:08:59,297 INFO L225 Difference]: With dead ends: 50 [2022-07-14 06:08:59,298 INFO L226 Difference]: Without dead ends: 35 [2022-07-14 06:08:59,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:08:59,298 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:08:59,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-07-14 06:08:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-14 06:08:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-14 06:08:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-07-14 06:08:59,300 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 18 [2022-07-14 06:08:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:08:59,300 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-07-14 06:08:59,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:08:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-07-14 06:08:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:08:59,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:08:59,301 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-07-14 06:08:59,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-07-14 06:08:59,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:08:59,508 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:08:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:08:59,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2022-07-14 06:08:59,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:08:59,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298186374] [2022-07-14 06:08:59,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:08:59,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:08:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:08:59,509 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:08:59,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:08:59,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:08:59,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:08:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 06:08:59,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:08:59,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:08:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:08:59,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:00,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:00,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298186374] [2022-07-14 06:09:00,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298186374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:00,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:00,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-14 06:09:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549133474] [2022-07-14 06:09:00,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:00,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:09:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:09:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:09:00,582 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:02,097 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2022-07-14 06:09:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:09:02,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-14 06:09:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:02,098 INFO L225 Difference]: With dead ends: 131 [2022-07-14 06:09:02,098 INFO L226 Difference]: Without dead ends: 131 [2022-07-14 06:09:02,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:09:02,099 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:02,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 99 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-07-14 06:09:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-14 06:09:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 51. [2022-07-14 06:09:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-14 06:09:02,102 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 18 [2022-07-14 06:09:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:02,102 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-14 06:09:02,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-14 06:09:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-14 06:09:02,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:02,103 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:02,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-14 06:09:02,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:02,309 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:09:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1515193216, now seen corresponding path program 2 times [2022-07-14 06:09:02,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:02,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169572771] [2022-07-14 06:09:02,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:02,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:02,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:02,311 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:02,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:09:02,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:02,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:09:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:02,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:09:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:02,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:04,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:04,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169572771] [2022-07-14 06:09:04,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169572771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:04,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:04,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2022-07-14 06:09:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510068315] [2022-07-14 06:09:04,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:09:04,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:04,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:09:04,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:09:04,526 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:05,336 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2022-07-14 06:09:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:09:05,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 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 24 [2022-07-14 06:09:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:05,339 INFO L225 Difference]: With dead ends: 73 [2022-07-14 06:09:05,339 INFO L226 Difference]: Without dead ends: 66 [2022-07-14 06:09:05,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:09:05,340 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:05,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 92 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 21 Unchecked, 0.5s Time] [2022-07-14 06:09:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-14 06:09:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-07-14 06:09:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-07-14 06:09:05,343 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 24 [2022-07-14 06:09:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:05,343 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-07-14 06:09:05,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-07-14 06:09:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-14 06:09:05,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:05,344 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:05,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-14 06:09:05,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:05,552 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:09:05,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:05,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1844565766, now seen corresponding path program 3 times [2022-07-14 06:09:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:05,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947805264] [2022-07-14 06:09:05,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:05,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:05,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:05,554 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:05,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 06:09:05,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:09:05,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:05,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 06:09:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:05,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:09:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:06,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:07,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:07,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947805264] [2022-07-14 06:09:07,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947805264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:07,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:07,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-07-14 06:09:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931035081] [2022-07-14 06:09:07,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:07,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:09:07,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:09:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:09:07,718 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:11,112 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-07-14 06:09:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:09:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 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 32 [2022-07-14 06:09:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:11,114 INFO L225 Difference]: With dead ends: 84 [2022-07-14 06:09:11,114 INFO L226 Difference]: Without dead ends: 84 [2022-07-14 06:09:11,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:09:11,126 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:11,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 69 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 130 Invalid, 0 Unknown, 18 Unchecked, 1.3s Time] [2022-07-14 06:09:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-14 06:09:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2022-07-14 06:09:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.123076923076923) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2022-07-14 06:09:11,134 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 32 [2022-07-14 06:09:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:11,134 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2022-07-14 06:09:11,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2022-07-14 06:09:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:09:11,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:11,137 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2022-07-14 06:09:11,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:11,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:11,338 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:09:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2022-07-14 06:09:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:11,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119912541] [2022-07-14 06:09:11,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:11,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:11,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:11,341 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:11,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:09:11,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 06:09:11,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 06:09:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:11,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:09:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:11,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,735 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:14,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119912541] [2022-07-14 06:09:14,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119912541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:14,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:14,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-07-14 06:09:14,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173747490] [2022-07-14 06:09:14,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:09:14,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:09:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:09:14,737 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:30,703 INFO L93 Difference]: Finished difference Result 483 states and 497 transitions. [2022-07-14 06:09:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:09:30,705 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-14 06:09:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:30,706 INFO L225 Difference]: With dead ends: 483 [2022-07-14 06:09:30,707 INFO L226 Difference]: Without dead ends: 483 [2022-07-14 06:09:30,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=547, Invalid=1259, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 06:09:30,708 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 434 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:30,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 314 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 567 Invalid, 0 Unknown, 22 Unchecked, 3.1s Time] [2022-07-14 06:09:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-07-14 06:09:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 99. [2022-07-14 06:09:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2022-07-14 06:09:30,713 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 34 [2022-07-14 06:09:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:30,713 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2022-07-14 06:09:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2022-07-14 06:09:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:09:30,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:30,714 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:30,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-07-14 06:09:30,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:30,916 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:09:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 597234191, now seen corresponding path program 4 times [2022-07-14 06:09:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:30,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705175435] [2022-07-14 06:09:30,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:09:30,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:30,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:30,917 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:30,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-14 06:09:30,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:09:30,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:31,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:09:31,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:31,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:09:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-14 06:09:31,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:35,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705175435] [2022-07-14 06:09:35,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705175435] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:35,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:35,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2022-07-14 06:09:35,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672116739] [2022-07-14 06:09:35,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:35,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 06:09:35,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 06:09:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:09:35,333 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:36,534 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2022-07-14 06:09:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:09:36,535 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 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 44 [2022-07-14 06:09:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:36,536 INFO L225 Difference]: With dead ends: 141 [2022-07-14 06:09:36,536 INFO L226 Difference]: Without dead ends: 130 [2022-07-14 06:09:36,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:09:36,536 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:36,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 109 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-07-14 06:09:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-14 06:09:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2022-07-14 06:09:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 103 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2022-07-14 06:09:36,540 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 44 [2022-07-14 06:09:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:36,540 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2022-07-14 06:09:36,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2022-07-14 06:09:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:09:36,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:36,541 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:36,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:36,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:36,749 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:09:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:36,750 INFO L85 PathProgramCache]: Analyzing trace with hash 557214165, now seen corresponding path program 5 times [2022-07-14 06:09:36,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:36,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124601232] [2022-07-14 06:09:36,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:09:36,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:36,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:36,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:36,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 06:09:36,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-14 06:09:36,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:36,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-14 06:09:36,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:36,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:09:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:09:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:46,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:09:46,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124601232] [2022-07-14 06:09:46,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124601232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:46,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:09:46,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 37 [2022-07-14 06:09:46,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323186210] [2022-07-14 06:09:46,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:46,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 06:09:46,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:09:46,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 06:09:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:09:46,226 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:53,200 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2022-07-14 06:09:53,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 06:09:53,202 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-14 06:09:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:53,202 INFO L225 Difference]: With dead ends: 181 [2022-07-14 06:09:53,202 INFO L226 Difference]: Without dead ends: 166 [2022-07-14 06:09:53,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:09:53,203 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:53,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 249 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 463 Invalid, 0 Unknown, 39 Unchecked, 2.2s Time] [2022-07-14 06:09:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-14 06:09:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 139. [2022-07-14 06:09:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.1094890510948905) internal successors, (152), 138 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 152 transitions. [2022-07-14 06:09:53,206 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 152 transitions. Word has length 52 [2022-07-14 06:09:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:53,206 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 152 transitions. [2022-07-14 06:09:53,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 152 transitions. [2022-07-14 06:09:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:09:53,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:53,207 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:53,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:53,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:09:53,407 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:09:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -724026728, now seen corresponding path program 6 times [2022-07-14 06:09:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:09:53,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239563452] [2022-07-14 06:09:53,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:09:53,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:09:53,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:09:53,409 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:09:53,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 06:09:53,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-14 06:09:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:53,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:09:53,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:53,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:09:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 26 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:54,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:01,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239563452] [2022-07-14 06:10:01,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239563452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:01,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:01,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 42 [2022-07-14 06:10:01,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294360870] [2022-07-14 06:10:01,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:01,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:10:01,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:10:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:10:01,587 INFO L87 Difference]: Start difference. First operand 139 states and 152 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:08,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:10:12,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:10:13,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:10:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:37,226 INFO L93 Difference]: Finished difference Result 275 states and 287 transitions. [2022-07-14 06:10:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-14 06:10:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 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 56 [2022-07-14 06:10:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:37,228 INFO L225 Difference]: With dead ends: 275 [2022-07-14 06:10:37,228 INFO L226 Difference]: Without dead ends: 252 [2022-07-14 06:10:37,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=1525, Invalid=7031, Unknown=0, NotChecked=0, Total=8556 [2022-07-14 06:10:37,230 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 417 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:37,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 378 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 884 Invalid, 0 Unknown, 96 Unchecked, 9.3s Time] [2022-07-14 06:10:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-14 06:10:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 140. [2022-07-14 06:10:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.1014492753623188) internal successors, (152), 139 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2022-07-14 06:10:37,233 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 56 [2022-07-14 06:10:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:37,233 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2022-07-14 06:10:37,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2022-07-14 06:10:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-14 06:10:37,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:37,233 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:37,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:37,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:37,444 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:10:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash 488520603, now seen corresponding path program 7 times [2022-07-14 06:10:37,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:37,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207565989] [2022-07-14 06:10:37,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:10:37,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:37,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:37,446 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:10:37,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 06:10:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:37,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:10:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:37,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:10:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 34 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:38,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:43,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:43,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207565989] [2022-07-14 06:10:43,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207565989] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:43,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:43,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 39 [2022-07-14 06:10:43,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57981805] [2022-07-14 06:10:43,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:43,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-14 06:10:43,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-14 06:10:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:10:43,975 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:47,037 INFO L93 Difference]: Finished difference Result 230 states and 240 transitions. [2022-07-14 06:10:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:10:47,038 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 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 60 [2022-07-14 06:10:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:47,039 INFO L225 Difference]: With dead ends: 230 [2022-07-14 06:10:47,039 INFO L226 Difference]: Without dead ends: 211 [2022-07-14 06:10:47,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:10:47,040 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 110 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:47,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 270 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 367 Invalid, 0 Unknown, 30 Unchecked, 1.6s Time] [2022-07-14 06:10:47,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-14 06:10:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 179. [2022-07-14 06:10:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.07909604519774) internal successors, (191), 178 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 191 transitions. [2022-07-14 06:10:47,043 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 191 transitions. Word has length 60 [2022-07-14 06:10:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:47,043 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 191 transitions. [2022-07-14 06:10:47,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.0256410256410255) internal successors, (118), 39 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 191 transitions. [2022-07-14 06:10:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-14 06:10:47,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:47,044 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:47,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:47,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:10:47,253 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:10:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:47,254 INFO L85 PathProgramCache]: Analyzing trace with hash -749046242, now seen corresponding path program 8 times [2022-07-14 06:10:47,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:10:47,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575961318] [2022-07-14 06:10:47,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:47,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:10:47,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:10:47,255 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:10:47,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:10:47,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:47,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:10:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:47,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:10:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:48,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 27 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:53,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:10:53,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575961318] [2022-07-14 06:10:53,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575961318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:53,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:10:53,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2022-07-14 06:10:53,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008100846] [2022-07-14 06:10:53,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:53,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:10:53,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:10:53,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:10:53,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:10:53,947 INFO L87 Difference]: Start difference. First operand 179 states and 191 transitions. Second operand has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:25,022 INFO L93 Difference]: Finished difference Result 282 states and 292 transitions. [2022-07-14 06:11:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-14 06:11:25,023 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 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 64 [2022-07-14 06:11:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:25,024 INFO L225 Difference]: With dead ends: 282 [2022-07-14 06:11:25,024 INFO L226 Difference]: Without dead ends: 282 [2022-07-14 06:11:25,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=1582, Invalid=6250, Unknown=0, NotChecked=0, Total=7832 [2022-07-14 06:11:25,026 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 514 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:25,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 367 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1026 Invalid, 0 Unknown, 58 Unchecked, 2.3s Time] [2022-07-14 06:11:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-14 06:11:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 132. [2022-07-14 06:11:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.0923076923076922) internal successors, (142), 131 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2022-07-14 06:11:25,030 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 64 [2022-07-14 06:11:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:25,030 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2022-07-14 06:11:25,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.073170731707317) internal successors, (126), 42 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2022-07-14 06:11:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 06:11:25,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:25,031 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2022-07-14 06:11:25,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:25,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:11:25,238 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-07-14 06:11:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2022-07-14 06:11:25,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:11:25,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114033413] [2022-07-14 06:11:25,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:11:25,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:11:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:11:25,240 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:11:25,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:11:25,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:11:25,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:11:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:25,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-14 06:11:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:11:26,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:11:33,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:11:33,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114033413] [2022-07-14 06:11:33,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114033413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:33,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:11:33,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2022-07-14 06:11:33,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651106554] [2022-07-14 06:11:33,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:33,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:11:33,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:11:33,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:11:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:11:33,519 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:43,414 WARN L233 SmtUtils]: Spent 7.93s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:11:45,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:11:46,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:11:48,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:11:49,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:11:58,281 WARN L233 SmtUtils]: Spent 7.76s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:12:13,778 WARN L233 SmtUtils]: Spent 14.69s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:12:16,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:18,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:20,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:22,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:29,055 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:12:41,882 WARN L233 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:12:43,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:45,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:12:47,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:04,702 WARN L233 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:13:07,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:09,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:11,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:23,500 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 06:13:25,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:27,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-14 06:13:29,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []