./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test18.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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:11:33,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:11:33,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:11:33,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:11:33,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:11:33,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:11:33,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:11:33,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:11:33,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:11:33,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:11:33,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:11:33,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:11:33,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:11:33,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:11:33,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:11:33,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:11:33,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:11:33,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:11:33,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:11:33,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:11:33,532 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:11:33,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:11:33,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:11:33,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:11:33,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:11:33,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:11:33,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:11:33,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:11:33,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:11:33,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:11:33,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:11:33,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:11:33,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:11:33,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:11:33,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:11:33,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:11:33,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:11:33,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:11:33,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:11:33,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:11:33,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:11:33,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:11:33,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:11:33,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:11:33,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:11:33,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:11:33,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:11:33,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:11:33,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:11:33,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:11:33,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:11:33,594 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:11:33,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:11:33,596 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:11:33,596 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:11:33,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:11:33,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:11:33,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:11:33,597 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:11:33,597 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:11:33,597 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:11:33,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:11:33,597 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:11:33,598 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:11:33,598 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:11:33,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:11:33,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:11:33,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:11:33,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:11:33,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:11:33,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:11:33,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:11:33,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:11:33,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2022-07-23 06:11:33,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:11:33,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:11:33,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:11:33,906 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:11:33,907 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:11:33,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-07-23 06:11:33,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afa9c1f9a/5d764cbfb8004bd0ad324f3c80206474/FLAGd96fed972 [2022-07-23 06:11:34,429 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:11:34,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-07-23 06:11:34,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afa9c1f9a/5d764cbfb8004bd0ad324f3c80206474/FLAGd96fed972 [2022-07-23 06:11:34,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afa9c1f9a/5d764cbfb8004bd0ad324f3c80206474 [2022-07-23 06:11:34,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:11:34,793 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:11:34,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:11:34,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:11:34,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:11:34,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:11:34" (1/1) ... [2022-07-23 06:11:34,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47bb5216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:34, skipping insertion in model container [2022-07-23 06:11:34,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:11:34" (1/1) ... [2022-07-23 06:11:34,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:11:34,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:11:35,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:11:35,316 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-07-23 06:11:35,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62fc5b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:35, skipping insertion in model container [2022-07-23 06:11:35,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:11:35,319 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-07-23 06:11:35,321 INFO L158 Benchmark]: Toolchain (without parser) took 526.59ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 59.5MB in the beginning and 100.2MB in the end (delta: -40.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-23 06:11:35,323 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory is still 77.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:11:35,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 521.11ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 59.2MB in the beginning and 100.2MB in the end (delta: -41.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-23 06:11:35,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory is still 77.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 521.11ms. Allocated memory was 98.6MB in the beginning and 123.7MB in the end (delta: 25.2MB). Free memory was 59.2MB in the beginning and 100.2MB in the end (delta: -41.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test18.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 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:11:37,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:11:37,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:11:37,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:11:37,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:11:37,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:11:37,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:11:37,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:11:37,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:11:37,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:11:37,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:11:37,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:11:37,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:11:37,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:11:37,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:11:37,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:11:37,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:11:37,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:11:37,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:11:37,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:11:37,341 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:11:37,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:11:37,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:11:37,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:11:37,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:11:37,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:11:37,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:11:37,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:11:37,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:11:37,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:11:37,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:11:37,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:11:37,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:11:37,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:11:37,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:11:37,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:11:37,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:11:37,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:11:37,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:11:37,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:11:37,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:11:37,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:11:37,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:11:37,406 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:11:37,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:11:37,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:11:37,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:11:37,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:11:37,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:11:37,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:11:37,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:11:37,409 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:11:37,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:11:37,410 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:11:37,410 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:11:37,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:11:37,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:11:37,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:11:37,411 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:11:37,411 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:11:37,412 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:11:37,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:11:37,412 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:11:37,412 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:11:37,412 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:11:37,413 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:11:37,413 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:11:37,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:11:37,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:11:37,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:11:37,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:11:37,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:11:37,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:11:37,415 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:11:37,415 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:37,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:11:37,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98678a21a2b37b871d00192aacebe14c4ee9cc87b75400dd7a4adc0ccfa93151 [2022-07-23 06:11:37,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:11:37,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:11:37,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:11:37,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:11:37,764 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:11:37,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-07-23 06:11:37,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd089d1ec/b0a4ccbf847145448df7fd09ad77294d/FLAG962413932 [2022-07-23 06:11:38,498 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:11:38,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test18.i [2022-07-23 06:11:38,526 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd089d1ec/b0a4ccbf847145448df7fd09ad77294d/FLAG962413932 [2022-07-23 06:11:38,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd089d1ec/b0a4ccbf847145448df7fd09ad77294d [2022-07-23 06:11:38,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:11:38,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:11:38,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:11:38,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:11:38,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:11:38,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:11:38" (1/1) ... [2022-07-23 06:11:38,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e12d107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:38, skipping insertion in model container [2022-07-23 06:11:38,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:11:38" (1/1) ... [2022-07-23 06:11:38,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:11:38,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:11:39,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:11:39,388 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-07-23 06:11:39,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:11:39,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:11:39,476 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:11:39,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:11:39,595 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:11:39,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39 WrapperNode [2022-07-23 06:11:39,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:11:39,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:11:39,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:11:39,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:11:39,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,665 INFO L137 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 52 [2022-07-23 06:11:39,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:11:39,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:11:39,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:11:39,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:11:39,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:11:39,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:11:39,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:11:39,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:11:39,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (1/1) ... [2022-07-23 06:11:39,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:11:39,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:11:39,765 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-23 06:11:39,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-23 06:11:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-23 06:11:39,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-23 06:11:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:11:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:11:39,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:11:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:11:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:11:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:11:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:11:39,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:11:39,929 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:11:39,930 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:11:40,156 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:11:40,162 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:11:40,162 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-23 06:11:40,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:11:40 BoogieIcfgContainer [2022-07-23 06:11:40,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:11:40,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:11:40,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:11:40,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:11:40,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:11:38" (1/3) ... [2022-07-23 06:11:40,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f067afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:11:40, skipping insertion in model container [2022-07-23 06:11:40,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:11:39" (2/3) ... [2022-07-23 06:11:40,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f067afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:11:40, skipping insertion in model container [2022-07-23 06:11:40,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:11:40" (3/3) ... [2022-07-23 06:11:40,173 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test18.i [2022-07-23 06:11:40,187 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:11:40,190 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-07-23 06:11:40,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:11:40,252 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@1c8a005b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fa8684 [2022-07-23 06:11:40,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-07-23 06:11:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:11:40,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:40,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:40,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1121278797, now seen corresponding path program 1 times [2022-07-23 06:11:40,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:40,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885820174] [2022-07-23 06:11:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:40,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:40,300 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:40,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:11:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:40,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:11:40,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:40,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:40,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:40,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885820174] [2022-07-23 06:11:40,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885820174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:40,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:40,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753231291] [2022-07-23 06:11:40,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:40,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:40,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:40,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:40,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:40,561 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:11:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:40,727 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-07-23 06:11:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:40,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-23 06:11:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:40,737 INFO L225 Difference]: With dead ends: 74 [2022-07-23 06:11:40,737 INFO L226 Difference]: Without dead ends: 70 [2022-07-23 06:11:40,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:40,751 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:40,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 160 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:11:40,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-23 06:11:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2022-07-23 06:11:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:11:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-23 06:11:40,800 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 11 [2022-07-23 06:11:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:40,800 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-23 06:11:40,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:11:40,802 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-23 06:11:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 06:11:40,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:40,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:40,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:41,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:41,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:41,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:41,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2008782478, now seen corresponding path program 1 times [2022-07-23 06:11:41,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:41,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100049083] [2022-07-23 06:11:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:41,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:41,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:41,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:11:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:11:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:41,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:41,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:41,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100049083] [2022-07-23 06:11:41,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100049083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:41,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:41,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:11:41,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342270414] [2022-07-23 06:11:41,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:41,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:11:41,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:11:41,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:11:41,130 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:11:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:41,249 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-07-23 06:11:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:11:41,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-23 06:11:41,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:41,253 INFO L225 Difference]: With dead ends: 69 [2022-07-23 06:11:41,253 INFO L226 Difference]: Without dead ends: 67 [2022-07-23 06:11:41,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:11:41,254 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:41,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 145 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:11:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-23 06:11:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2022-07-23 06:11:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-23 06:11:41,264 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 11 [2022-07-23 06:11:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:41,264 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-23 06:11:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:11:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-23 06:11:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:11:41,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:41,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:41,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:41,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:41,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash -539289096, now seen corresponding path program 1 times [2022-07-23 06:11:41,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:41,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458684050] [2022-07-23 06:11:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:41,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:41,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:41,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:41,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:11:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:41,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:11:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:41,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:41,550 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:41,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458684050] [2022-07-23 06:11:41,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458684050] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:41,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:41,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:11:41,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961263971] [2022-07-23 06:11:41,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:41,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:11:41,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:11:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:11:41,553 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:11:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:41,603 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-07-23 06:11:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:11:41,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-23 06:11:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:41,605 INFO L225 Difference]: With dead ends: 67 [2022-07-23 06:11:41,605 INFO L226 Difference]: Without dead ends: 67 [2022-07-23 06:11:41,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:11:41,607 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 59 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:41,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:11:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-23 06:11:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-07-23 06:11:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-07-23 06:11:41,613 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 13 [2022-07-23 06:11:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:41,613 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-07-23 06:11:41,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 06:11:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-07-23 06:11:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:11:41,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:41,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:41,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:41,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:41,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1099978464, now seen corresponding path program 1 times [2022-07-23 06:11:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:41,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987264225] [2022-07-23 06:11:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:41,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:41,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:41,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:11:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:41,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 06:11:41,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:41,929 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 [2022-07-23 06:11:42,074 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:11:42,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-23 06:11:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:42,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:42,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:42,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987264225] [2022-07-23 06:11:42,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987264225] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:42,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:42,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-07-23 06:11:42,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70685606] [2022-07-23 06:11:42,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:42,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:11:42,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:11:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:11:42,317 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:11:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:42,492 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-07-23 06:11:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:11:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2022-07-23 06:11:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:42,494 INFO L225 Difference]: With dead ends: 58 [2022-07-23 06:11:42,494 INFO L226 Difference]: Without dead ends: 58 [2022-07-23 06:11:42,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:11:42,495 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:42,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 158 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-07-23 06:11:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-23 06:11:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-07-23 06:11:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 48 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-23 06:11:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-23 06:11:42,506 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 18 [2022-07-23 06:11:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:42,506 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-23 06:11:42,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:11:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-07-23 06:11:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:11:42,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:42,507 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:42,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:42,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:42,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:42,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1099978465, now seen corresponding path program 1 times [2022-07-23 06:11:42,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:42,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245140264] [2022-07-23 06:11:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:42,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:42,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:42,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:42,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:11:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:42,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:11:42,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:42,790 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 [2022-07-23 06:11:42,797 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 [2022-07-23 06:11:43,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:11:43,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:11:43,013 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:11:43,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:11:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:43,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:45,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:45,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245140264] [2022-07-23 06:11:45,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245140264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876481407] [2022-07-23 06:11:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:45,618 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:45,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:11:45,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:11:45,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-07-23 06:11:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:11:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:45,785 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 [2022-07-23 06:11:45,790 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 [2022-07-23 06:11:45,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:11:45,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:11:45,946 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:11:45,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:11:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:45,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:48,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [876481407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:48,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:48,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-07-23 06:11:48,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513490176] [2022-07-23 06:11:48,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:48,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:11:48,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:11:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:11:48,330 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:51,054 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2022-07-23 06:11:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:11:51,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-23 06:11:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:51,057 INFO L225 Difference]: With dead ends: 154 [2022-07-23 06:11:51,057 INFO L226 Difference]: Without dead ends: 154 [2022-07-23 06:11:51,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2022-07-23 06:11:51,058 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 90 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:51,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 602 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 501 Invalid, 0 Unknown, 48 Unchecked, 0.6s Time] [2022-07-23 06:11:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-23 06:11:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2022-07-23 06:11:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 69 states have internal predecessors, (92), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-23 06:11:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 107 transitions. [2022-07-23 06:11:51,075 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 107 transitions. Word has length 18 [2022-07-23 06:11:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:51,076 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 107 transitions. [2022-07-23 06:11:51,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 107 transitions. [2022-07-23 06:11:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 06:11:51,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:51,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:51,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:51,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:51,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:51,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash 594419839, now seen corresponding path program 1 times [2022-07-23 06:11:51,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:51,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881001660] [2022-07-23 06:11:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:51,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:51,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:51,485 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:51,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:11:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:11:51,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:51,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:51,583 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:51,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881001660] [2022-07-23 06:11:51,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881001660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:51,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:51,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:51,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456770307] [2022-07-23 06:11:51,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:51,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:51,585 INFO L87 Difference]: Start difference. First operand 77 states and 107 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:51,638 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2022-07-23 06:11:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:11:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-23 06:11:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:51,640 INFO L225 Difference]: With dead ends: 70 [2022-07-23 06:11:51,640 INFO L226 Difference]: Without dead ends: 68 [2022-07-23 06:11:51,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:51,641 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:51,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:11:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-23 06:11:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-23 06:11:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 62 states have internal predecessors, (82), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:11:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 93 transitions. [2022-07-23 06:11:51,648 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 93 transitions. Word has length 18 [2022-07-23 06:11:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:51,648 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 93 transitions. [2022-07-23 06:11:51,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 93 transitions. [2022-07-23 06:11:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 06:11:51,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:51,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:51,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:51,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:51,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:51,850 INFO L85 PathProgramCache]: Analyzing trace with hash 517297676, now seen corresponding path program 1 times [2022-07-23 06:11:51,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:51,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14099374] [2022-07-23 06:11:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:51,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:51,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:51,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:51,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 06:11:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:51,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:11:51,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:11:51,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:51,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:51,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14099374] [2022-07-23 06:11:51,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14099374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:51,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:51,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:11:51,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748420603] [2022-07-23 06:11:51,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:51,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:11:51,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:51,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:11:51,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:51,934 INFO L87 Difference]: Start difference. First operand 68 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:11:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:51,988 INFO L93 Difference]: Finished difference Result 113 states and 149 transitions. [2022-07-23 06:11:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:11:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-07-23 06:11:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:51,990 INFO L225 Difference]: With dead ends: 113 [2022-07-23 06:11:51,990 INFO L226 Difference]: Without dead ends: 113 [2022-07-23 06:11:51,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:11:51,991 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:51,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:11:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-23 06:11:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 72. [2022-07-23 06:11:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 64 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:11:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2022-07-23 06:11:51,998 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 20 [2022-07-23 06:11:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:51,998 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2022-07-23 06:11:51,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:11:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2022-07-23 06:11:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 06:11:51,999 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:52,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:52,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:52,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:52,209 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:52,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2034859285, now seen corresponding path program 1 times [2022-07-23 06:11:52,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:52,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077751311] [2022-07-23 06:11:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:52,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:52,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:52,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:52,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:11:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:52,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:11:52,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:11:52,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:11:52,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077751311] [2022-07-23 06:11:52,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077751311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:11:52,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:11:52,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:11:52,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656462983] [2022-07-23 06:11:52,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:11:52,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:11:52,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:11:52,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:11:52,291 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:52,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:52,349 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2022-07-23 06:11:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:11:52,350 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), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-23 06:11:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:52,351 INFO L225 Difference]: With dead ends: 72 [2022-07-23 06:11:52,351 INFO L226 Difference]: Without dead ends: 72 [2022-07-23 06:11:52,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:11:52,352 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:52,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 109 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:11:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-23 06:11:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-07-23 06:11:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 56 states have internal predecessors, (70), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:11:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-07-23 06:11:52,357 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 20 [2022-07-23 06:11:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:52,358 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-07-23 06:11:52,358 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), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:11:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-07-23 06:11:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 06:11:52,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:52,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:52,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:52,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:52,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:52,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1343870148, now seen corresponding path program 1 times [2022-07-23 06:11:52,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:52,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790710774] [2022-07-23 06:11:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:52,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:52,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:52,562 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:52,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:11:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:52,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:11:52,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:11:52,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:11:52,853 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:52,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790710774] [2022-07-23 06:11:52,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790710774] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:52,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:52,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-07-23 06:11:52,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003952691] [2022-07-23 06:11:52,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:52,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:11:52,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:11:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:11:52,855 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:11:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:52,999 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2022-07-23 06:11:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:11:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-07-23 06:11:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:53,001 INFO L225 Difference]: With dead ends: 67 [2022-07-23 06:11:53,001 INFO L226 Difference]: Without dead ends: 65 [2022-07-23 06:11:53,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:11:53,002 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:53,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 132 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-07-23 06:11:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-23 06:11:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-23 06:11:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.4) internal successors, (70), 56 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-23 06:11:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2022-07-23 06:11:53,006 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 21 [2022-07-23 06:11:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:53,007 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2022-07-23 06:11:53,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:11:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2022-07-23 06:11:53,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-23 06:11:53,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:53,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:53,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:53,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:53,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2006472631, now seen corresponding path program 1 times [2022-07-23 06:11:53,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:53,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090258128] [2022-07-23 06:11:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:53,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:53,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:53,219 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:53,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 06:11:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:53,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:11:53,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:53,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:11:53,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:11:53,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090258128] [2022-07-23 06:11:53,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090258128] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:11:53,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:11:53,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-23 06:11:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529731020] [2022-07-23 06:11:53,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:11:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 06:11:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:11:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 06:11:53,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 06:11:53,401 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:11:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:11:53,535 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2022-07-23 06:11:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:11:53,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2022-07-23 06:11:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:11:53,537 INFO L225 Difference]: With dead ends: 181 [2022-07-23 06:11:53,537 INFO L226 Difference]: Without dead ends: 181 [2022-07-23 06:11:53,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:11:53,538 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 197 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:11:53,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 189 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:11:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-23 06:11:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 92. [2022-07-23 06:11:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.364864864864865) internal successors, (101), 78 states have internal predecessors, (101), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:11:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2022-07-23 06:11:53,552 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 23 [2022-07-23 06:11:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:11:53,553 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2022-07-23 06:11:53,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:11:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2022-07-23 06:11:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 06:11:53,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:11:53,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:11:53,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 06:11:53,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:11:53,764 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:11:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:11:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1845507550, now seen corresponding path program 1 times [2022-07-23 06:11:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:11:53,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453984656] [2022-07-23 06:11:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:53,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:11:53,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:11:53,767 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:11:53,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 06:11:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:53,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 06:11:53,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:11:53,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:11:58,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:11:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453984656] [2022-07-23 06:11:58,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453984656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:11:58,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1600058606] [2022-07-23 06:11:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:11:58,128 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:11:58,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:11:58,130 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:11:58,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-07-23 06:11:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:11:58,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:11:58,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:11:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:11:58,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:02,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1600058606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:02,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:02,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-07-23 06:12:02,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042187792] [2022-07-23 06:12:02,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:02,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 06:12:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 06:12:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=166, Unknown=2, NotChecked=0, Total=210 [2022-07-23 06:12:02,557 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:02,651 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-07-23 06:12:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 06:12:02,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-07-23 06:12:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:02,653 INFO L225 Difference]: With dead ends: 100 [2022-07-23 06:12:02,653 INFO L226 Difference]: Without dead ends: 93 [2022-07-23 06:12:02,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=50, Invalid=220, Unknown=2, NotChecked=0, Total=272 [2022-07-23 06:12:02,654 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:02,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 256 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-07-23 06:12:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-23 06:12:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-07-23 06:12:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 77 states have internal predecessors, (97), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 06:12:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2022-07-23 06:12:02,659 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 24 [2022-07-23 06:12:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:02,659 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2022-07-23 06:12:02,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2022-07-23 06:12:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 06:12:02,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:02,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:02,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:02,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:03,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:03,061 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2918772, now seen corresponding path program 1 times [2022-07-23 06:12:03,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:03,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971924897] [2022-07-23 06:12:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:03,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:03,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:03,064 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:03,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:12:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 06:12:03,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:03,150 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 [2022-07-23 06:12:03,155 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 [2022-07-23 06:12:05,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:05,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:05,393 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:05,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:07,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:07,574 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:07,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:12:07,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:08,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:08,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971924897] [2022-07-23 06:12:08,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971924897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:08,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1254389038] [2022-07-23 06:12:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:08,105 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:08,106 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:08,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-07-23 06:12:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:08,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 06:12:08,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:08,267 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 [2022-07-23 06:12:08,275 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 [2022-07-23 06:12:08,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:08,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:08,415 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:08,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:08,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:08,547 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:08,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:12:08,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:08,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1254389038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:08,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:08,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-07-23 06:12:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399716231] [2022-07-23 06:12:08,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:08,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:12:08,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:12:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2022-07-23 06:12:08,918 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:12:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:09,278 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2022-07-23 06:12:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 06:12:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-07-23 06:12:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:09,280 INFO L225 Difference]: With dead ends: 141 [2022-07-23 06:12:09,280 INFO L226 Difference]: Without dead ends: 141 [2022-07-23 06:12:09,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2022-07-23 06:12:09,281 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 91 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:09,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 229 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 260 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-07-23 06:12:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-23 06:12:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 94. [2022-07-23 06:12:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 82 states have internal predecessors, (107), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-23 06:12:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2022-07-23 06:12:09,292 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 28 [2022-07-23 06:12:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:09,292 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2022-07-23 06:12:09,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:12:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2022-07-23 06:12:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 06:12:09,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:09,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:09,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:09,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:09,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:09,694 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:09,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash 252730558, now seen corresponding path program 1 times [2022-07-23 06:12:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:09,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764643876] [2022-07-23 06:12:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:09,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:09,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:09,696 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:09,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 06:12:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:12:09,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:12:09,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:10,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-07-23 06:12:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:12:11,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764643876] [2022-07-23 06:12:11,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764643876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:11,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:11,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-23 06:12:11,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742188155] [2022-07-23 06:12:11,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:11,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 06:12:11,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 06:12:11,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:12:11,131 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:12:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:12,793 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2022-07-23 06:12:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 06:12:12,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2022-07-23 06:12:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:12,796 INFO L225 Difference]: With dead ends: 160 [2022-07-23 06:12:12,796 INFO L226 Difference]: Without dead ends: 160 [2022-07-23 06:12:12,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-07-23 06:12:12,797 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 365 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:12,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 257 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 283 Invalid, 0 Unknown, 44 Unchecked, 0.9s Time] [2022-07-23 06:12:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-23 06:12:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 77. [2022-07-23 06:12:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 65 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-07-23 06:12:12,802 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 30 [2022-07-23 06:12:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:12,803 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-07-23 06:12:12,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:12:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-07-23 06:12:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:12:12,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:12,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:12,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:13,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:13,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:13,015 INFO L85 PathProgramCache]: Analyzing trace with hash -755287307, now seen corresponding path program 1 times [2022-07-23 06:12:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:13,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006216323] [2022-07-23 06:12:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:13,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:13,017 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:13,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 06:12:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:13,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:12:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:13,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:12:13,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:12:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 06:12:13,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:12:13,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:13,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006216323] [2022-07-23 06:12:13,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006216323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:13,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:13,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2022-07-23 06:12:13,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830394816] [2022-07-23 06:12:13,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:13,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 06:12:13,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:13,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 06:12:13,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-23 06:12:13,547 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:12:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:14,221 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2022-07-23 06:12:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 06:12:14,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-07-23 06:12:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:14,223 INFO L225 Difference]: With dead ends: 117 [2022-07-23 06:12:14,223 INFO L226 Difference]: Without dead ends: 117 [2022-07-23 06:12:14,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-07-23 06:12:14,225 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 286 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:14,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 256 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 394 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-07-23 06:12:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-23 06:12:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 84. [2022-07-23 06:12:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 71 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-23 06:12:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-07-23 06:12:14,230 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 31 [2022-07-23 06:12:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:14,231 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-07-23 06:12:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:12:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-07-23 06:12:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:12:14,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:14,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:14,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-23 06:12:14,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:14,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1939069955, now seen corresponding path program 1 times [2022-07-23 06:12:14,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:14,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247929971] [2022-07-23 06:12:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:14,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:14,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:14,446 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:14,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 06:12:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:14,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 06:12:14,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:14,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:12:15,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:12:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:15,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:12:15,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:15,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247929971] [2022-07-23 06:12:15,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247929971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:15,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:15,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2022-07-23 06:12:15,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201287531] [2022-07-23 06:12:15,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:15,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 06:12:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 06:12:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:12:15,532 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:12:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:15,807 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2022-07-23 06:12:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 06:12:15,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2022-07-23 06:12:15,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:15,809 INFO L225 Difference]: With dead ends: 143 [2022-07-23 06:12:15,809 INFO L226 Difference]: Without dead ends: 143 [2022-07-23 06:12:15,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-07-23 06:12:15,810 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 30 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:15,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 266 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2022-07-23 06:12:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-23 06:12:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2022-07-23 06:12:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 100 states have (on average 1.26) internal successors, (126), 107 states have internal predecessors, (126), 8 states have call successors, (8), 6 states have call predecessors, (8), 10 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-23 06:12:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-07-23 06:12:15,815 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 32 [2022-07-23 06:12:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:15,816 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-07-23 06:12:15,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:12:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-07-23 06:12:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:12:15,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:15,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:15,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:16,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:16,026 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:16,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:16,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1947073116, now seen corresponding path program 2 times [2022-07-23 06:12:16,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:16,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756768232] [2022-07-23 06:12:16,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:12:16,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:16,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:16,028 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:16,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 06:12:16,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:12:16,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:12:16,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:12:16,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:12:16,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:12:16,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:16,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756768232] [2022-07-23 06:12:16,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756768232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:12:16,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:12:16,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:12:16,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168627597] [2022-07-23 06:12:16,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:12:16,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:12:16,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:12:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:12:16,117 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:12:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:16,149 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2022-07-23 06:12:16,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 06:12:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2022-07-23 06:12:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:16,151 INFO L225 Difference]: With dead ends: 112 [2022-07-23 06:12:16,151 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 06:12:16,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:12:16,152 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:16,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 148 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:12:16,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 06:12:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2022-07-23 06:12:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.208955223880597) internal successors, (81), 73 states have internal predecessors, (81), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:12:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-07-23 06:12:16,157 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 32 [2022-07-23 06:12:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:16,157 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-07-23 06:12:16,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:12:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-07-23 06:12:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 06:12:16,158 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:16,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:16,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:16,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:16,368 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:16,369 INFO L85 PathProgramCache]: Analyzing trace with hash 18373623, now seen corresponding path program 1 times [2022-07-23 06:12:16,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:16,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17234885] [2022-07-23 06:12:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:16,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:16,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:16,371 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:16,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 06:12:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:16,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 06:12:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:16,486 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 [2022-07-23 06:12:16,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:12:16,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-23 06:12:16,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-23 06:12:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:12:16,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:12:16,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:16,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17234885] [2022-07-23 06:12:16,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17234885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:16,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:16,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2022-07-23 06:12:16,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808132510] [2022-07-23 06:12:16,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:16,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 06:12:16,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:16,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 06:12:16,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:12:16,970 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:12:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:17,966 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2022-07-23 06:12:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 06:12:17,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2022-07-23 06:12:17,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:17,968 INFO L225 Difference]: With dead ends: 96 [2022-07-23 06:12:17,968 INFO L226 Difference]: Without dead ends: 96 [2022-07-23 06:12:17,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 06:12:17,970 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:17,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 255 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 616 Invalid, 0 Unknown, 51 Unchecked, 0.6s Time] [2022-07-23 06:12:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-23 06:12:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2022-07-23 06:12:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 75 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:12:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-07-23 06:12:17,974 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 33 [2022-07-23 06:12:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:17,975 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-07-23 06:12:17,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 06:12:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-07-23 06:12:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:12:17,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:17,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:17,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:18,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:18,184 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1907841251, now seen corresponding path program 1 times [2022-07-23 06:12:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:18,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356399614] [2022-07-23 06:12:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:18,186 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:18,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:12:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:18,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:12:18,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:12:18,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:12:18,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:18,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356399614] [2022-07-23 06:12:18,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356399614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:18,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:18,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-23 06:12:18,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495774212] [2022-07-23 06:12:18,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:18,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:12:18,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:12:18,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:12:18,409 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:12:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:18,541 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2022-07-23 06:12:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:12:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-07-23 06:12:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:18,543 INFO L225 Difference]: With dead ends: 100 [2022-07-23 06:12:18,543 INFO L226 Difference]: Without dead ends: 100 [2022-07-23 06:12:18,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:12:18,544 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 52 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:18,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 197 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:12:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-23 06:12:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2022-07-23 06:12:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.2) internal successors, (90), 81 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:12:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-07-23 06:12:18,548 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 36 [2022-07-23 06:12:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:18,549 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-07-23 06:12:18,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 06:12:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-07-23 06:12:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-23 06:12:18,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:18,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:18,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:18,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:18,756 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1443160135, now seen corresponding path program 2 times [2022-07-23 06:12:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:18,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801830231] [2022-07-23 06:12:18,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:12:18,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:18,759 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:18,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 06:12:18,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:12:18,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:12:18,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-23 06:12:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:18,877 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 [2022-07-23 06:12:18,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 06:12:19,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:19,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:19,054 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:19,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:19,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:19,220 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:19,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:21,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:21,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:21,395 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:21,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:12:21,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:23,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:23,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801830231] [2022-07-23 06:12:23,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801830231] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:23,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1230397418] [2022-07-23 06:12:23,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:12:23,997 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:23,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:23,998 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:23,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-07-23 06:12:24,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:12:24,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:12:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-23 06:12:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:24,157 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 [2022-07-23 06:12:24,161 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 [2022-07-23 06:12:24,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:24,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:24,263 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:24,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:26,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:26,363 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:26,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:26,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:12:26,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:26,491 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:12:26,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:12:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:12:26,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:28,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1230397418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:28,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:28,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2022-07-23 06:12:28,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3119736] [2022-07-23 06:12:28,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:28,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 06:12:28,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 06:12:28,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2022-07-23 06:12:28,821 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:29,266 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2022-07-23 06:12:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 06:12:29,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-07-23 06:12:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:29,267 INFO L225 Difference]: With dead ends: 141 [2022-07-23 06:12:29,267 INFO L226 Difference]: Without dead ends: 141 [2022-07-23 06:12:29,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=55, Invalid=286, Unknown=1, NotChecked=0, Total=342 [2022-07-23 06:12:29,268 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 84 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:29,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 327 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 400 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-07-23 06:12:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-23 06:12:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 93. [2022-07-23 06:12:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 81 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:12:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2022-07-23 06:12:29,272 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 38 [2022-07-23 06:12:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:29,272 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2022-07-23 06:12:29,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:12:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2022-07-23 06:12:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-23 06:12:29,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:29,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:29,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:29,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:29,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:29,678 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -515638253, now seen corresponding path program 1 times [2022-07-23 06:12:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:29,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817646917] [2022-07-23 06:12:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:29,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:29,681 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:29,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 06:12:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:29,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 06:12:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:29,762 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 [2022-07-23 06:12:29,864 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:12:29,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-23 06:12:29,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:12:30,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-23 06:12:34,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-23 06:12:34,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:12:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:34,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:12:34,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817646917] [2022-07-23 06:12:34,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817646917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:12:34,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:12:34,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2022-07-23 06:12:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277714936] [2022-07-23 06:12:34,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:12:34,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 06:12:34,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:12:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 06:12:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=564, Unknown=1, NotChecked=0, Total=650 [2022-07-23 06:12:34,950 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:12:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:12:36,947 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-07-23 06:12:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 06:12:36,948 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-07-23 06:12:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:12:36,949 INFO L225 Difference]: With dead ends: 140 [2022-07-23 06:12:36,949 INFO L226 Difference]: Without dead ends: 140 [2022-07-23 06:12:36,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=263, Invalid=1898, Unknown=1, NotChecked=0, Total=2162 [2022-07-23 06:12:36,950 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 137 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:12:36,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 211 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 649 Invalid, 0 Unknown, 94 Unchecked, 0.8s Time] [2022-07-23 06:12:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-23 06:12:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 96. [2022-07-23 06:12:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.205128205128205) internal successors, (94), 84 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-23 06:12:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2022-07-23 06:12:36,956 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 38 [2022-07-23 06:12:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:12:36,956 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2022-07-23 06:12:36,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 06:12:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2022-07-23 06:12:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 06:12:36,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:12:36,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:12:36,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 06:12:37,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:12:37,164 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:12:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:12:37,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1607118890, now seen corresponding path program 1 times [2022-07-23 06:12:37,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:12:37,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162643627] [2022-07-23 06:12:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:37,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:12:37,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:12:37,166 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:12:37,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 06:12:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:37,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-23 06:12:37,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:37,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:12:37,760 INFO L356 Elim1Store]: treesize reduction 6, result has 50.0 percent of original size [2022-07-23 06:12:37,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2022-07-23 06:12:37,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-23 06:12:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:12:42,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:12:53,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:12:53,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162643627] [2022-07-23 06:12:53,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162643627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:12:53,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882707564] [2022-07-23 06:12:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:12:53,028 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:12:53,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:12:53,029 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:12:53,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-07-23 06:12:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:12:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 06:12:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:12:55,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:12:55,974 INFO L356 Elim1Store]: treesize reduction 19, result has 24.0 percent of original size [2022-07-23 06:12:55,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2022-07-23 06:12:56,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-07-23 06:13:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:13:10,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:15,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-23 06:13:22,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [882707564] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:22,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:22,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-07-23 06:13:22,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054893268] [2022-07-23 06:13:22,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:22,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 06:13:22,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:22,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 06:13:22,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2229, Unknown=16, NotChecked=0, Total=2450 [2022-07-23 06:13:22,672 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:13:22,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:22,704 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-07-23 06:13:22,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 06:13:22,705 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-07-23 06:13:22,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:22,706 INFO L225 Difference]: With dead ends: 101 [2022-07-23 06:13:22,706 INFO L226 Difference]: Without dead ends: 84 [2022-07-23 06:13:22,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 43.8s TimeCoverageRelationStatistics Valid=205, Invalid=2229, Unknown=16, NotChecked=0, Total=2450 [2022-07-23 06:13:22,707 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:22,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 305 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 179 Unchecked, 0.0s Time] [2022-07-23 06:13:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-23 06:13:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-23 06:13:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 73 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-23 06:13:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-07-23 06:13:22,710 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 40 [2022-07-23 06:13:22,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:22,711 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-07-23 06:13:22,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:13:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-07-23 06:13:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 06:13:22,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:22,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:13:22,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:22,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:23,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:23,112 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:13:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:23,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1528456508, now seen corresponding path program 1 times [2022-07-23 06:13:23,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:23,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087487103] [2022-07-23 06:13:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:23,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:23,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:23,115 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:23,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-23 06:13:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:13:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:13:23,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:13:23,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087487103] [2022-07-23 06:13:23,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087487103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:23,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:23,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-23 06:13:23,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750071690] [2022-07-23 06:13:23,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:23,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 06:13:23,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 06:13:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-23 06:13:23,334 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 06:13:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:23,586 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2022-07-23 06:13:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:13:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 44 [2022-07-23 06:13:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:23,588 INFO L225 Difference]: With dead ends: 138 [2022-07-23 06:13:23,589 INFO L226 Difference]: Without dead ends: 138 [2022-07-23 06:13:23,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:13:23,589 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 126 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:23,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 215 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:13:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-23 06:13:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2022-07-23 06:13:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 82 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-23 06:13:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2022-07-23 06:13:23,593 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 44 [2022-07-23 06:13:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:23,593 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2022-07-23 06:13:23,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 06:13:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2022-07-23 06:13:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 06:13:23,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:23,594 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:13:23,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:23,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:23,803 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:13:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1589564234, now seen corresponding path program 2 times [2022-07-23 06:13:23,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:23,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949410571] [2022-07-23 06:13:23,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:13:23,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:23,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:23,805 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:23,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 06:13:23,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:13:23,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:13:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:13:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:13:24,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:24,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-23 06:13:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:13:26,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:26,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949410571] [2022-07-23 06:13:26,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949410571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:26,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:26,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-07-23 06:13:26,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167725172] [2022-07-23 06:13:26,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:26,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 06:13:26,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 06:13:26,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:13:26,270 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-23 06:13:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:32,552 INFO L93 Difference]: Finished difference Result 223 states and 237 transitions. [2022-07-23 06:13:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-23 06:13:32,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2022-07-23 06:13:32,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:32,555 INFO L225 Difference]: With dead ends: 223 [2022-07-23 06:13:32,555 INFO L226 Difference]: Without dead ends: 223 [2022-07-23 06:13:32,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-07-23 06:13:32,557 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 513 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:32,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 367 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-23 06:13:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-23 06:13:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 107. [2022-07-23 06:13:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 95 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-23 06:13:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2022-07-23 06:13:32,562 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 46 [2022-07-23 06:13:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:32,562 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2022-07-23 06:13:32,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-23 06:13:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2022-07-23 06:13:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 06:13:32,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:32,564 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:13:32,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-23 06:13:32,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:13:32,772 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:13:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash -899085478, now seen corresponding path program 3 times [2022-07-23 06:13:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:32,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803380211] [2022-07-23 06:13:32,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:13:32,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:32,774 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:32,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 06:13:32,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 06:13:32,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:13:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-23 06:13:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:32,935 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 [2022-07-23 06:13:37,117 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:13:37,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:13:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:41,485 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-07-23 06:13:41,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2022-07-23 06:13:41,494 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:41,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-23 06:13:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:41,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:13:41,876 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:41,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-23 06:13:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:46,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:13:46,162 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:46,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-23 06:13:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 06:13:46,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:46,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803380211] [2022-07-23 06:13:46,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803380211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:46,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [183175798] [2022-07-23 06:13:46,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 06:13:46,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:13:46,805 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:13:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-23 06:13:47,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 06:13:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:13:47,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-23 06:13:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:47,186 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 [2022-07-23 06:13:47,193 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 [2022-07-23 06:13:47,504 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:47,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:13:47,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:13:47,776 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:13:47,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-23 06:13:47,790 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:47,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-23 06:13:48,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:48,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:13:48,108 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:48,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-23 06:13:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:50,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:13:50,290 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:13:50,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-23 06:13:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-23 06:13:50,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:52,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [183175798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:13:52,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:52,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 30 [2022-07-23 06:13:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340044100] [2022-07-23 06:13:52,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:52,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 06:13:52,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:52,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 06:13:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=939, Unknown=4, NotChecked=0, Total=1056 [2022-07-23 06:13:52,668 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 26 states have internal predecessors, (47), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-23 06:13:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:13:57,720 INFO L93 Difference]: Finished difference Result 201 states and 226 transitions. [2022-07-23 06:13:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 06:13:57,721 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 26 states have internal predecessors, (47), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2022-07-23 06:13:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:13:57,722 INFO L225 Difference]: With dead ends: 201 [2022-07-23 06:13:57,722 INFO L226 Difference]: Without dead ends: 201 [2022-07-23 06:13:57,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=169, Invalid=1385, Unknown=6, NotChecked=0, Total=1560 [2022-07-23 06:13:57,724 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 110 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:13:57,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 608 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 689 Invalid, 0 Unknown, 225 Unchecked, 0.6s Time] [2022-07-23 06:13:57,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-23 06:13:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 111. [2022-07-23 06:13:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.2365591397849462) internal successors, (115), 98 states have internal predecessors, (115), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-23 06:13:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-07-23 06:13:57,731 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 48 [2022-07-23 06:13:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:13:57,731 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-07-23 06:13:57,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 26 states have internal predecessors, (47), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-23 06:13:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-07-23 06:13:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 06:13:57,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:13:57,732 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:13:57,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-07-23 06:13:57,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-07-23 06:13:58,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:13:58,140 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:13:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:13:58,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2031851011, now seen corresponding path program 1 times [2022-07-23 06:13:58,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:13:58,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397001403] [2022-07-23 06:13:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:13:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:13:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:13:58,142 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:13:58,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 06:13:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:13:58,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:13:58,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:13:58,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:13:58,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:13:58,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-23 06:13:58,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:13:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:13:58,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:13:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:13:58,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:13:58,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397001403] [2022-07-23 06:13:58,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397001403] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:13:58,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:13:58,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2022-07-23 06:13:58,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640856382] [2022-07-23 06:13:58,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:13:58,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 06:13:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:13:58,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 06:13:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:13:58,976 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-23 06:14:01,753 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 [] [2022-07-23 06:14:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:02,298 INFO L93 Difference]: Finished difference Result 147 states and 160 transitions. [2022-07-23 06:14:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-23 06:14:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 47 [2022-07-23 06:14:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:02,301 INFO L225 Difference]: With dead ends: 147 [2022-07-23 06:14:02,301 INFO L226 Difference]: Without dead ends: 147 [2022-07-23 06:14:02,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2022-07-23 06:14:02,302 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 352 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:02,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 325 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 539 Invalid, 1 Unknown, 44 Unchecked, 2.6s Time] [2022-07-23 06:14:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-23 06:14:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2022-07-23 06:14:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 104 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-23 06:14:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2022-07-23 06:14:02,307 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 47 [2022-07-23 06:14:02,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:02,308 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2022-07-23 06:14:02,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-23 06:14:02,308 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2022-07-23 06:14:02,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 06:14:02,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:02,309 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:02,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-23 06:14:02,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:14:02,515 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:14:02,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1437128181, now seen corresponding path program 1 times [2022-07-23 06:14:02,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:02,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551587532] [2022-07-23 06:14:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:02,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:02,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:02,517 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:02,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 06:14:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:14:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:02,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:14:02,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:02,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-23 06:14:03,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 06:14:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:14:03,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-23 06:14:03,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551587532] [2022-07-23 06:14:03,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551587532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:14:03,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:03,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-07-23 06:14:03,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805487850] [2022-07-23 06:14:03,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:03,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 06:14:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 06:14:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:14:03,673 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-23 06:14:07,140 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 [] [2022-07-23 06:14:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:08,191 INFO L93 Difference]: Finished difference Result 145 states and 158 transitions. [2022-07-23 06:14:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-23 06:14:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-07-23 06:14:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:08,193 INFO L225 Difference]: With dead ends: 145 [2022-07-23 06:14:08,193 INFO L226 Difference]: Without dead ends: 145 [2022-07-23 06:14:08,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 06:14:08,194 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 276 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 68 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:08,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 261 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 668 Invalid, 1 Unknown, 66 Unchecked, 3.1s Time] [2022-07-23 06:14:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-23 06:14:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2022-07-23 06:14:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 105 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-23 06:14:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2022-07-23 06:14:08,198 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 48 [2022-07-23 06:14:08,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:08,199 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2022-07-23 06:14:08,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-23 06:14:08,199 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2022-07-23 06:14:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-23 06:14:08,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:08,200 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:08,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-23 06:14:08,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:14:08,404 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:14:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1601300735, now seen corresponding path program 1 times [2022-07-23 06:14:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:08,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844689792] [2022-07-23 06:14:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:08,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:08,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:08,407 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:08,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 06:14:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:08,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-23 06:14:08,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:08,546 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 [2022-07-23 06:14:08,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:14:08,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-23 06:14:08,730 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-23 06:14:08,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 33 [2022-07-23 06:14:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:08,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-07-23 06:14:08,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-07-23 06:14:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:09,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-23 06:14:09,268 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:14:09,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-07-23 06:14:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:14:09,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:09,783 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844689792] [2022-07-23 06:14:09,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844689792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:14:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930449439] [2022-07-23 06:14:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:09,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:14:09,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:14:09,784 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:14:09,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-23 06:14:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:09,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 06:14:09,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:09,991 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 [2022-07-23 06:14:10,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:14:10,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-07-23 06:14:10,096 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-23 06:14:10,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 33 [2022-07-23 06:14:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:10,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-07-23 06:14:10,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-07-23 06:14:10,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:10,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-07-23 06:14:10,417 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:14:10,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-07-23 06:14:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:14:10,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:10,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [930449439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:14:10,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:10,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2022-07-23 06:14:10,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459105621] [2022-07-23 06:14:10,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:10,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 06:14:10,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:10,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 06:14:10,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-07-23 06:14:10,631 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:14:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:11,219 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2022-07-23 06:14:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 06:14:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-07-23 06:14:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:11,221 INFO L225 Difference]: With dead ends: 131 [2022-07-23 06:14:11,221 INFO L226 Difference]: Without dead ends: 131 [2022-07-23 06:14:11,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 06:14:11,221 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:11,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 270 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 425 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-07-23 06:14:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-23 06:14:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2022-07-23 06:14:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.202020202020202) internal successors, (119), 105 states have internal predecessors, (119), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-23 06:14:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2022-07-23 06:14:11,225 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 49 [2022-07-23 06:14:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:11,226 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2022-07-23 06:14:11,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:14:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2022-07-23 06:14:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 06:14:11,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:11,227 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:11,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:11,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-07-23 06:14:11,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:14:11,636 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:14:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 148524762, now seen corresponding path program 1 times [2022-07-23 06:14:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:11,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786750526] [2022-07-23 06:14:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:11,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:11,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:11,638 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:11,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-23 06:14:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:11,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:14:11,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:14:11,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 06:14:11,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:11,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786750526] [2022-07-23 06:14:11,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786750526] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:14:11,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:11,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-23 06:14:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811873682] [2022-07-23 06:14:11,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:11,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 06:14:11,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 06:14:11,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:14:11,953 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 06:14:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:12,140 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2022-07-23 06:14:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:14:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2022-07-23 06:14:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:12,142 INFO L225 Difference]: With dead ends: 119 [2022-07-23 06:14:12,142 INFO L226 Difference]: Without dead ends: 119 [2022-07-23 06:14:12,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:14:12,143 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:12,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 337 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:14:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-23 06:14:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-07-23 06:14:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 92 states have (on average 1.141304347826087) internal successors, (105), 98 states have internal predecessors, (105), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-23 06:14:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-07-23 06:14:12,147 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 52 [2022-07-23 06:14:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:12,147 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-07-23 06:14:12,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 06:14:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-07-23 06:14:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-23 06:14:12,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:12,148 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:12,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-07-23 06:14:12,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:14:12,359 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:14:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1274788323, now seen corresponding path program 1 times [2022-07-23 06:14:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861364688] [2022-07-23 06:14:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:14:12,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:12,361 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:12,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 06:14:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:14:12,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 06:14:12,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 06:14:12,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 06:14:12,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:12,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861364688] [2022-07-23 06:14:12,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861364688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:14:12,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:12,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-23 06:14:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363908458] [2022-07-23 06:14:12,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:12,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 06:14:12,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 06:14:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:14:12,846 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-23 06:14:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:13,361 INFO L93 Difference]: Finished difference Result 387 states and 411 transitions. [2022-07-23 06:14:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:14:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 55 [2022-07-23 06:14:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:13,365 INFO L225 Difference]: With dead ends: 387 [2022-07-23 06:14:13,366 INFO L226 Difference]: Without dead ends: 387 [2022-07-23 06:14:13,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:14:13,371 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 777 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:13,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 530 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 06:14:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-23 06:14:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 144. [2022-07-23 06:14:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 125 states have internal predecessors, (137), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-23 06:14:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2022-07-23 06:14:13,377 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 55 [2022-07-23 06:14:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:13,378 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2022-07-23 06:14:13,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-23 06:14:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2022-07-23 06:14:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 06:14:13,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:13,379 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:13,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:13,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:14:13,590 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:14:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash 998331403, now seen corresponding path program 2 times [2022-07-23 06:14:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180141181] [2022-07-23 06:14:13,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:14:13,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:13,592 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:13,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-23 06:14:13,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:14:13,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:14:13,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 06:14:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:13,720 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 [2022-07-23 06:14:13,778 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:13,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:13,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:14:15,889 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_65| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_65|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_60|))) is different from true [2022-07-23 06:14:15,974 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-23 06:14:15,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-23 06:14:18,018 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_66| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_66|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61|))) is different from true [2022-07-23 06:14:18,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-23 06:14:18,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-07-23 06:14:18,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:18,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-07-23 06:14:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:14:18,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180141181] [2022-07-23 06:14:18,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180141181] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:14:18,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:18,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-07-23 06:14:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355927961] [2022-07-23 06:14:18,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:18,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-23 06:14:18,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-23 06:14:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=588, Unknown=2, NotChecked=98, Total=756 [2022-07-23 06:14:18,882 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 06:14:34,064 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 [] [2022-07-23 06:14:36,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:14:39,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:14:42,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:14:44,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 06:14:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:44,553 INFO L93 Difference]: Finished difference Result 171 states and 195 transitions. [2022-07-23 06:14:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-23 06:14:44,554 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2022-07-23 06:14:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:44,555 INFO L225 Difference]: With dead ends: 171 [2022-07-23 06:14:44,555 INFO L226 Difference]: Without dead ends: 171 [2022-07-23 06:14:44,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=290, Invalid=2794, Unknown=4, NotChecked=218, Total=3306 [2022-07-23 06:14:44,557 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 42 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:44,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 505 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 946 Invalid, 5 Unknown, 347 Unchecked, 11.4s Time] [2022-07-23 06:14:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-23 06:14:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 147. [2022-07-23 06:14:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 128 states have internal predecessors, (142), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-23 06:14:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2022-07-23 06:14:44,563 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 54 [2022-07-23 06:14:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:44,563 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2022-07-23 06:14:44,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 06:14:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2022-07-23 06:14:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-23 06:14:44,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:44,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:44,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:44,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:14:44,776 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:14:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1999848787, now seen corresponding path program 4 times [2022-07-23 06:14:44,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:44,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649778045] [2022-07-23 06:14:44,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 06:14:44,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:44,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:44,778 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:44,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-23 06:14:44,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 06:14:44,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:14:44,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 06:14:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:44,961 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 [2022-07-23 06:14:44,968 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 [2022-07-23 06:14:45,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:45,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:45,181 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:45,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:45,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:45,461 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:45,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:45,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:45,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:45,725 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:45,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:47,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:47,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:47,939 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:47,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:50,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:50,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:50,225 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:50,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 06:14:50,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:50,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:14:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649778045] [2022-07-23 06:14:50,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649778045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:14:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171056614] [2022-07-23 06:14:50,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 06:14:50,974 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:14:50,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:14:50,975 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:14:50,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-07-23 06:14:51,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 06:14:51,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:14:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 06:14:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:51,234 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 [2022-07-23 06:14:51,241 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 [2022-07-23 06:14:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:53,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:53,428 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:53,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:53,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:53,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:53,553 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:53,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:53,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:53,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:53,724 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:53,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:53,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:53,871 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:53,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:54,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:14:54,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-23 06:14:54,017 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:14:54,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-23 06:14:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 06:14:54,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:14:54,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1171056614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:14:54,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:14:54,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2022-07-23 06:14:54,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301022803] [2022-07-23 06:14:54,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:14:54,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 06:14:54,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:14:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 06:14:54,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:14:54,459 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:14:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:14:55,194 INFO L93 Difference]: Finished difference Result 235 states and 264 transitions. [2022-07-23 06:14:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 06:14:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2022-07-23 06:14:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:14:55,196 INFO L225 Difference]: With dead ends: 235 [2022-07-23 06:14:55,196 INFO L226 Difference]: Without dead ends: 235 [2022-07-23 06:14:55,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:14:55,197 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 122 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:14:55,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 561 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 645 Invalid, 0 Unknown, 69 Unchecked, 0.6s Time] [2022-07-23 06:14:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-23 06:14:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 147. [2022-07-23 06:14:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 122 states have (on average 1.1557377049180328) internal successors, (141), 128 states have internal predecessors, (141), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-23 06:14:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2022-07-23 06:14:55,202 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 58 [2022-07-23 06:14:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:14:55,203 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2022-07-23 06:14:55,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 06:14:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2022-07-23 06:14:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 06:14:55,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:14:55,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:14:55,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-23 06:14:55,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-07-23 06:14:55,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:14:55,616 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-07-23 06:14:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:14:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1618774478, now seen corresponding path program 2 times [2022-07-23 06:14:55,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:14:55,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015734324] [2022-07-23 06:14:55,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:14:55,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:14:55,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:14:55,618 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:14:55,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-23 06:14:55,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:14:55,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:14:55,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-23 06:14:55,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:14:56,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:14:56,223 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-23 06:14:56,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2022-07-23 06:14:56,817 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-23 06:14:56,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 57 [2022-07-23 06:14:57,085 INFO L356 Elim1Store]: treesize reduction 39, result has 13.3 percent of original size [2022-07-23 06:14:57,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 103 [2022-07-23 06:15:00,020 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-23 06:15:00,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 42 [2022-07-23 06:15:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:15:20,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:15:22,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-07-23 06:15:22,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-07-23 06:15:39,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:15:39,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015734324] [2022-07-23 06:15:39,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015734324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:15:39,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [831868689] [2022-07-23 06:15:39,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:15:39,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:15:39,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:15:39,297 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:15:39,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-23 06:15:39,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:15:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:15:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-23 06:15:39,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:15:46,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-23 06:15:46,899 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-23 06:15:46,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2022-07-23 06:15:59,798 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-23 06:15:59,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-07-23 06:16:00,368 INFO L356 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2022-07-23 06:16:00,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 49 [2022-07-23 06:16:02,548 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-23 06:16:02,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 38